Training methodology
The engine calculates, the human teaches and automated analysis organizes. How to split the work between the three without paying twice for the same thing.
An engine like Stockfish tells you the best move, but not why you failed to find it. A human trainer explains the why and holds you accountable, but will not review a thousand games. Automated analysis covers the middle: it finds the pattern behind the mistake so the lesson treats the cause, not the symptom.
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Repertoire
A working repertoire is not a list of memorized variations. It is a small set of structures you understand — and the English and the Sicilian are an efficient pair to build that on.
A usable repertoire rests on pawn structures, not on the number of lines. Pick one first move as White and one defense against 1.e4, learn the three or four structures they produce, and only go deeper into variations that have actually shown up in your own games.
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Rating progress
A plateau is rarely a lack of knowledge. It is a handful of repeated mistakes, calculation cut short and decisions made with the clock in the red.
Between 1000 and 1800, rating stalls for three reasons: tactical mistakes repeated in the same type of position, calculation abandoned before the opponent's reply, and rushed decisions caused by poor clock management. All three can be measured in your own history and fixed with targeted training, not with more content.
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Repertoire
1.c4 trades forcing theory for structural understanding. Four formations cover almost every game — and transpositions do the rest of the work.
The English Opening fights for the center from the flank: the c4 pawn presses on d5 without opening a single forcing line on move one. Required theory is short and the payoff is positional. Whoever knows the four typical structures still steers the middlegame when the opponent leaves the book on move six.
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Repertoire
The Sicilian gives Black genuine counterplay — provided you pick one variation, understand the structure, and know what to do against the anti-Sicilians that show up in half your games.
The Sicilian trades Black's c-pawn for White's d-pawn and produces an asymmetrical position: Black gets the central majority and a half-open c-file, White gets space and the initiative. That is an advantage for anyone who can handle imbalance — and a trap for anyone who only memorized the first ten moves.
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Training methodology
A recorded course solves a shortage of content. A plateau is almost never a shortage of content — it is a shortage of selection and of feedback on your own decision process.
A recorded course delivers the content its author chose to teach, in their order, to an average student who is not you. Coaching delivers selection, correction of your process, and accountability. When rating stalls, the bottleneck is usually choosing what to study — precisely what a video cannot do.
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Training methodology
Half an hour a day, five days a week, beats four hours on a Sunday — as long as those minutes are spent in the right places.
Thirty minutes a day is enough to gain rating, provided it is split between short tactics, reviewing your own games and one long game a week. What stalls the working adult is not the shortage of hours: it is spending the few they have memorizing openings, the part of the game that decides the fewest games below 2000.
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Repertoire
1.d4 d5 2.Nc3 Nf6 3.Bf4 trades the slow solidity of the classical London for direct plans — Nb5 hitting c7, the e4 break and the h4 assault.
The Jobava London is the classical London with a knight on c3 instead of a pawn on c3: White gives up the c2-c4 break to gain attacking tempo. There are three plans — Nb5 pressing c7, the e4 lever and the h4-h5 assault against a fianchetto — and they fit on a single page of notes.
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Endgames
Opposition, key squares, the rule of the square, the rook-pawn draw and the three-against-three breakthrough. Five patterns, and they decide more games than any opening line.
Five pawn-endgame patterns cover nearly everything that appears below 2000: key squares, the opposition, the rule of the square, the rook-pawn draw and the pawn breakthrough. You learn them once and use them forever, because their outcome is mathematical — it does not depend on evaluation, it depends on counting.
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Repertoire
1...d5 forces the issue on move two and erases White's preparation against the Sicilian, the French and the Caro-Kann. The price is understanding three squares for the queen.
The Scandinavian answers 1.e4 with 1...d5 and settles Black's entire repertoire against the most popular first move in chess. All the relevant theory revolves around where the queen goes after 2.exd5 Qxd5 3.Nc3 — a5, d6 or d8 — and around a development scheme that is essentially the same in all three cases.
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Repertoire
3.Bc4 points at f7 on move three, and it is the first opening almost everyone learns. What almost nobody learns is what to do from move six onwards.
The Italian Game arises from 1.e4 e5 2.Nf3 Nc6 3.Bc4 and splits into two different games: the Giuoco Piano, with an immediate d2-d4 and open play, and the Giuoco Pianissimo, with d2-d3, castling and the Nb1-d2-f1-g3 manoeuvre. Choosing between them decides everything — and most losses in the Italian come from playing the slow manoeuvre without knowing where it leads.
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Repertoire
1...c6 looks slow and is the opposite: it prepares ...d5 without locking in the c8 bishop, which is the problem the French never solves. Three White replies cover almost everything.
The Caro-Kann answers 1.e4 with 1...c6, preparing ...d5 with the c-pawn instead of the e-pawn — which is why the light-squared bishop gets out before the structure closes. The whole repertoire fits into three replies: the Advance (3.e5), the Exchange and Panov Attack (3.exd5) and the Classical (3.Nc3 or 3.Nd2). The rest is plans, not theory.
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Repertoire
The standard criticism is that the London is always the same. It is the same for five moves and completely different from move six — provided you know what you are playing against.
The London System sets up the same structure against almost everything — pawn on d4, bishop on f4, e3, c3, Bd3, Nbd2 — but the plan that follows changes completely with Black's reply. Against ...c5 it is the b-file and the trade on c5; against ...Bf5 it is Qb3 hitting b7; against ...g6 it is the attack with h4. Playing the same continuation in all three is what turns the London into autopilot and drains its strength.
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Training methodology
The engine tells you which move was best. It does not tell you why you failed to find it — and that second answer is the one that moves your rating.
Analyzing a game with an engine in five steps: write down what you were thinking before turning the engine on, mark the critical moments, only then consult Stockfish, translate each difference into a human cause, and turn the recurring causes into training. Turning the engine on first is the mistake that lets someone analyze a thousand games without improving at all.
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Training methodology
One mistake is bad luck. The same mistake in nine games is a diagnosis — and it is the only thing worth training.
No single game tells you where your real problem is. The pattern only appears in aggregate: the same phases, the same structures and the same kinds of decision going wrong again and again. This guide gives a taxonomy of six mistake families, a way to survey your own pattern across twenty games, and a rule for prioritising by cost in points rather than by frequency.
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Training methodology
Inaccuracy, mistake and blunder are centipawn bands, not judgements about your chess. Understanding the ruler is what separates reading the analysis from learning from it.
The inaccuracy, mistake and blunder labels come from an arithmetic operation: the centipawn drop between the evaluation before and after your move, compared against fixed thresholds. That makes the labels useful for triage and insufficient for learning, because the same drop can mean completely different things depending on the position — and it never tells you the human cause of the error.
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Training methodology
They are not three speeds of the same game. They are three games with different skills — and training all of them the same way is why your rating stalls in all three.
Rapid, blitz and bullet demand different skills: in rapid the plan decides, in blitz pattern recognition decides, and in bullet execution speed and an automated repertoire decide. Training that serves one gets in the way of the others, and choosing a main time control is a training decision, not a matter of taste.
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Competition
Strong online players usually lose the first two rounds for reasons that have nothing to do with chess: the clock, the scoresheet, touch-move and five hours of concentration.
An over-the-board tournament demands three things online chess does not: operating a clock and a scoresheet while you play, living with rules that only exist on a physical board — touch-move, phones, claims — and sustaining concentration for four or five hours at a stretch, several times over a weekend. Preparing those three is worth more than studying an opening the night before.
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Competition
In tournament week most players study the right thing at the wrong time. This schedule reverses the usual order: new chess leaves the stage early, and the last two days are about sleep, logistics and one short review.
You cannot get stronger in the week before a tournament, but you can arrive intact — and that is what decides the second day's rounds. This schedule spreads seven days in the opposite order to intuition: the repertoire is frozen at the start of the week, the study load falls every day, and the last two days deal with sleep, food and logistics, which is where most amateur points are actually lost.
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Repertoire
The Morra trades a pawn for three tempi of development and two open files. Against a player who does not know the defence, that decides games in twenty moves; against one who does, the price is an equal position a pawn down.
The Smith-Morra Gambit (1.e4 c5 2.d4 cxd4 3.c3) gives up a pawn to open the c- and d-files and bring every white piece into play before Black finishes developing. This guide covers White's standard formation, the two tactical themes behind most quick wins, the trap that punishes playing the Morra on autopilot, and what happens when Black knows the correct defence.
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Repertoire
Almost every material loss in the QGD comes from a single misunderstanding: believing the d5 pawn is hanging because the knight defending it is pinned. It usually is not.
The Queen's Gambit Declined is a solid opening in which almost every quick material loss comes from two opposite tactical motifs: White captures on d5 believing the black knight is pinned, and Black lets go of the defence of d5 in the middlegame. This guide covers the Elephant Trap, the Rubinstein Trap and the five-second check that avoids both.
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Rating progress
A stuck rating rarely means you have not studied enough. It usually means four measurable things are handing back, every month, the points your good games win.
A rating audit is a statistical reading of your own games to find where the points go — not another study plan. Four leaks account for most plateaus: training in one time control and competing in another, losing games in the conversion phase, concentrating your losses in a handful of opening lines, and playing on after the first loss of a session. This guide shows how to measure each one and what to do with the answer.
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Training methodology
Almost every hung piece has the same cause, and it is not weak calculation: it is a missing list. The move that won the piece was on the board the whole time and never entered the count, because nobody went looking for it.
Calculating in chess is two jobs that most club players collapse into one: building the list of moves worth calculating, and calculating each of them. This guide covers the scan that produces the list — checks, captures and threats, in that order, yours first and then your opponent's — three positions where it decides the game, and how to drill the routine until it runs on its own.
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Repertoire
The Scotch Gambit gives up the pawn on d4 to open the centre on move four and put the bishop on the f7 diagonal before Black has developed anything. It is the most direct way to play 1.e4 e5 without entering Ruy Lopez theory — and the modern main line is not the one the old books teach.
The Scotch Gambit (1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4) trades a central pawn for immediate development, an open centre and pressure on f7. This guide covers the modern main line with 5.c3 Nf6 6.e5, why the Möller Attack stopped being an elite choice, what to do against Black's two ways of giving the pawn back, and the Max Lange Attack against 4...Nf6.
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Repertoire
With no opening book, the first twenty moves have to be solved at the board. What replaces memory is not improvisation: it is a reading of the drawn position, done before the first move, that almost nobody bothers with.
In Chess960 the back rank is drawn from 960 possible arrangements and opening theory ceases to exist. This guide covers what changes and what does not, the three-question reading you make before the first move, the data that corrects the myth of the weak f7 square, how the castling rules work, and where development starts when the pieces are born on strange squares.
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Training methodology
The argument is usually treated as a matter of taste, and it is not. It has an answer — the answer is just different for each person, and it is sitting in the game history of whoever is asking.
Tactics or openings is the most repeated question in amateur chess, and it is badly posed: the two solve different problems, and only your own history says which problem is yours. This guide separates tactical vision from calculation, shows when opening study genuinely starts to matter, and describes the twenty-game test that settles the question in your case.
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Training methodology
The bar measures the position, not how hard it is to play — and the number moves with search depth and engine settings. This guide gives the three questions that turn an evaluation into a plan, with two cases measured here where the naive reading fails.
Studying an opening with an engine needs a different procedure from analysing a finished game: what matters is not the best move but what produced the number. This guide defines the evaluation-bar trap, gives the matrix that turns evaluation bands into positional concepts, shows two cases measured in Stockfish 18 where the naive reading fails — a capture that loses seventy hundredths between depth 20 and depth 30, and a position rated 0.00 that ended in mate sixteen moves later — and closes with a forty-minute protocol for studying a new line.
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Repertoire
Five different answers to the Ruy Lopez, measured at the same depth, fit inside four tenths of a pawn. If the evaluation barely separates the options, the choice has to be made on something else — and that something else is what this guide is about.
Answering 1.e4 with 1...e5 is the most natural choice in chess and the one that scares people most, because it looks like it requires the whole theory of the Ruy Lopez. It does not: five answers to the Ruy measured in Stockfish 18 at depth 28 land between +0.24 and +0.63, and what separates them is study cost rather than quality of position. From there the guide builds an entire repertoire around the bishop on c5 — against the Italian, the Scotch, the Four Knights and the gambits — with the evaluation of every line and the three places where the natural move is the wrong one.
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Repertoire
The same seven moves against almost anything Black plays — Nf3, d3, g3, Bg2, Nbd2, e4 and castles. The engine calls the result equal, and that is exactly the deal on offer: not an advantage, but a plan you already know.
The King's Indian Attack builds the same structure every game — Nf3, d3, g3, Bg2, Nbd2 and short castling — and only then picks a plan. This guide walks the setup move by move against the French, the Caro-Kann and the Sicilian, explains the e4-e5 advance that closes the centre and moves the game to the kingside, and describes the Nd2-f1-e3 manoeuvre behind the f4-f5 break. It also measures all three base positions in Stockfish 18: every one of them level, and why that is not an argument against the system.
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Competition
A four-board match has 81 possible scorelines, and 32 of them are decided by half a point. That arithmetic changes when you accept a draw, what repertoire survives two hours of training a week, and how much a named opponent — known days in advance, unlike in a Swiss — is worth preparing for.
Playing for a team changes three decisions you would make differently on your own: when to take a draw, what to prepare about your opponent, and how much repertoire to keep warm between widely spaced rounds. This guide starts from the arithmetic of the format — the 81 result combinations of a four-board match, 32 of them decided by half a point — shows in which scenarios your own result actually swings the match and in which eight it is irrelevant, and closes with what to do with the two or three hours a full working week leaves behind.
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Repertoire
One pawn given away on move three in exchange for two open files that never close again. It is the purest case of permanent positional compensation in Black's repertoire — and also the case where the evaluation bar and the practical result disagree most often.
The Benko Gambit gives up a pawn on move three to open the a- and b-files and press on the queenside for the rest of the game. This guide walks through the main line move by move — the bishop trade that forces the white king to walk to g2 — defines the difference between tactical compensation and permanent positional compensation, and reports ten positions measured on Stockfish 18 at depth 26: the accepted line, the six common declines, and a comparison with the Modern Benoni, which reaches similar numbers without sacrificing anything.
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Training methodology
A nine-year-old does not study like a small version of a thirty-year-old. What changes is not the amount of content but the length of the session, the order in which things are learnt and what gets measured — and measuring the wrong thing is the fastest way to end a child's interest.
This guide describes how to organise a child's or teenager's chess study without turning it into a chore: the session length attention actually sustains at each age, the order in which content pays off most — elementary mates and endgames before openings —, what to do in the half hour after a tournament loss, and which indicators to follow instead of rating. It includes a weekly grid by age band and the division of labour between parents, coach and club.
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Repertoire
The bishop comes out to g5 on move three and the rest of the development repeats against almost everything. The engine agrees with the system against the ...e6 and ...g6 structures — and disagrees with it against 1...d5, which happens to be the most common reply.
The Torre Attack builds the same structure every game — d4, Nf3, Bg5, e3, Nbd2, Bd3 and c3 — and sidesteps the main lines of the Queen's Gambit. This guide shows the system move by move, measures Black's replies on Stockfish 18 at depth 26, and says where the system pays and where it does not: against 1...d5 and 3...Ne4 the engine favours Black, while against the ...e6 and ...g6 structures White comes out slightly better. It includes the critical b2-pawn line, where Black's queen may capture but must not stay.
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Competition
The mistake of time trouble is not playing worse on average — it is playing well fourteen times and disastrously on the fifteenth. We measured the cost of deciding fast across 369 positions on Stockfish 18, and the result changes what is worth training.
This guide is about deciding on a short clock: what changes when under three minutes remain, what deciding fast actually costs, and what to do with that information. It reports 369 middlegame positions measured on Stockfish 18 — comparing a shallow search's choice with a depth-22 choice, across two samples of differing messiness —, a five-rule checklist for time trouble, a clock budget table by time control, and the three causes that make the clock disappear before move 30.
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Endgames
A piece down and half a point in your pocket. The positions where material stops deciding are few and take seconds to recognise — and in one of them Stockfish 18 shows +0.84 over an exact draw.
A fortress is the position where extra material produces nothing: no king entry, no pawn break, no zugzwang that makes the barricade give way. This guide covers the three patterns club players actually meet — the rook-pawn corner with the wrong-coloured bishop, rook and pawn against queen, and opposite-coloured bishops — checks each of them against the endgame tablebase, and marks the exact line where each one stops working. It also covers the case where the engine's evaluation bar disagrees with the exact result.
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Repertoire
Five piece moves and the same structure against almost everything, at a cost of +0.20 out of the opening — the same as the London System. What does not survive checking is the other half of the promise: against correct black development the knight jump to e5 drops a pawn and the rook lift to h3 hands the advantage back.
The Colle-Zukertort builds the same structure every game — d4, Nf3, e3, Bd3, b3 and Bb2 — and sidesteps Queen's Gambit theory. This guide lays out the set-up move by move, measures it in Stockfish 18 at depth 26 and separates what pays from what does not: the opening position is worth +0.20, exactly like the London System, but Ne5 against ...Bd6 and ...Qc7 drops a pawn (−1.35) and the Rf3 lift falls to −1.07 after 11...c4. The plan the engine endorses is a different one, and it reaches +0.63.
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Repertoire
Nimzo-Indian players need an answer to 3.Nf3, and the Bogo-Indian is the cheapest one available: one check, four structures and no long theory. The price is known — +0.38 against the Nimzo's +0.19 — and two lines give all of it back.
The Bogo-Indian answers 1.d4 Nf6 2.c4 e6 3.Nf3 with 3...Bb4+, the check that forces White to commit before finishing development. This guide measures the defence in Stockfish 18 at depth 26: the starting position gives +0.38, nearly double the Nimzo-Indian, and two lines restore equality — 4.Bd2 a5 with 7.0-0, which zeroes the evaluation, and the immediate exchange on d2 against 4.Nbd2, which sits at +0.02. The expensive mistake is retreating the bishop after a3: +0.65.
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Competition
The round-four collapse is rarely forgotten theory. What tiredness removes first is the check on your opponent's reply — and the only part of a weekend Swiss you can still act on is the interval between games.
A double-round day puts between 6 and 10 hours of clock on the board, and performance drops long before knowledge runs out. This guide covers what actually changes on day two — the type of mistake, not the number of them —, the arithmetic of the schedule by time control, a 15-minute between-rounds routine split into three blocks of five, and why analysing the previous game during the break is the worst trade available at a tournament.
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Repertoire
The quietest pawn move in the Slav prepares ...b5 without shutting in the c8 bishop. What punishes White here is not a memorised trap — it is the most natural developing move on the board, 6.Bd3, which hands back the whole advantage.
The Chebanenko is the Slav with 4...a6: a pawn move that prepares ...b5, denies b5 to White's pieces and keeps the c8 bishop free, unlike the Semi-Slav. This guide measures it in Stockfish 18 at depth 24 — what the move costs against 4...e6, which four White tries deserve study and which three give equality back — and shows why the natural 6.Bd3 loses the advantage to 6...dxc4, with the automatic recapture on c4 dropping a whole piece.
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Repertoire
This is the Sicilian you can play without memorising the Najdorf or the Dragon: four knights out by move five and a single plan, ...Bb4 and ...d5. What it does not do is avoid dry positions — White's strongest try trades queens on move seven.
The Four Knights Sicilian comes from 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6, and it is the line where Black swaps memorised theory for one plan: ...Bb4, the exchange on c3 and the ...d5 break. This guide measures White's five tries in Stockfish 18 at depth 24, shows why 6.Ndb5 Bb4 7.Nd6+ is a check that gives the advantage away, and records what the engine actually prefers — 6.Nxc6, which leads to a simplified middlegame and is the test the variation's reputation tends to leave out.
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Repertoire
The Berlin does not equalise by tactics: it trades queens on move eight and offers an endgame where Black never castles and is still fine. The figure nobody quotes is that half of White's attempts to dodge that endgame hand back the opening advantage.
The Berlin is the reply 3...Nf6 to the Ruy Lopez, and the so-called wall is the endgame that follows 4.0-0 Nxe4 5.d4 Nd6 6.Bxc6 dxc6 7.dxe5 Nf5 8.Qxd8+ Kxd8. This guide measures the variation in Stockfish 18: the endgame is worth +0.24 at depth 26 — Black loses castling and keeps the bishop pair —, three of White's six fourth moves give equality back, and in the anti-Berlin with 5.Re1 there is exactly one fifth move for Black that does not lose material.
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Endgames
Rook and pawn against rook is the most common ending in chess and the worst played. What separates winning from drawing is not the stronger side's technique: it is where the defending king stands.
In a rook and pawn against rook ending, the result is usually settled before technique enters: if the defending king reaches the zone in front of the pawn, the position is a draw; if it stayed outside, it is a win. This guide measures that zone with endgame tablebases, sets out the Philidor defence and the Lucena position with every line checked square by square, and explains why the defending rook on the eighth rank loses what the same rook on the sixth saves.
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Repertoire
The Kan trades theory for flexibility: Black plays ...a6 before committing a single piece. What that delay buys, and the exact moment it starts costing.
The Sicilian Kan (1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6) solves the problem of wanting a Sicilian without memorising the forcing lines of the Najdorf or the Dragon: ...a6 takes b5 away from White's pieces and lets Black choose a structure after seeing what White does. This guide measures White's six replies at depth 24, sets out the main scheme with ...Qc7 and ...Bc5, and details the two moments where the flexibility turns into a problem: pushing ...b5 too early, and the attack on g7 with Qg4.
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Training methodology
Forty years of studies on how strong chess players are made reach two conclusions that course marketing tends to keep apart: the kind of training matters a great deal, and hours do not explain everything.
Deliberate practice is training designed to fix one specific weakness, with immediate feedback and difficulty at the edge of your ability — and playing games, on its own, does not fit the definition. This guide brings together what the main studies of chess players have measured: serious solo study as the strongest predictor of skill, an eightfold spread in the hours needed to reach master, the share of rating differences that practice explains and, in a longitudinal study of 44,213 Chess.com players, a 3.61-fold advantage in learning efficiency for deliberate-practice activities over playing games. It ends with a training week built from those findings.
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Training methodology
An MCP server puts Stockfish and your Lichess history into the conversation. What changes is not the evaluation — it is being able to ask the next question on top of the last answer.
An MCP server declares tools your AI agent can call mid-conversation: evaluate a position, walk a game move by move, explain why a move loses, turn that mistake into a puzzle, and aggregate recent games into an error profile. This guide covers what each of those returns, the centipawn ruler behind the word blunder, what each one costs in seconds on an ordinary machine, and where the tool stops — because it answers now and accumulates nothing.
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Training methodology
László Polgár didn't bet on generic deliberate practice: he built a curriculum catalogued by tactical motif and full-time mentoring. What of those two specific pieces — curriculum and mentor — an adult with a few hours a week can actually replicate.
Judit Polgár reached the world top 10 out of a pedagogical experiment run by her own father: thousands of tactical positions solved every day, catalogued by pattern, repeated until recognition became automatic. This guide separates what in that curriculum is replicable deliberate practice — a narrow goal, repetition with immediate correction, rising difficulty — from what depended on circumstances an adult with a few hours a week simply doesn't have, and shows how to adapt the method without the full-time-specialisation excess.
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Repertoire
Bishop on e6, knight on d5, pawn on f5: the three targets that keep reappearing whenever White attacks with opposite-side castling against 1...c5. What each sacrifice buys, and the point at which it stops paying off.
Against 1...c5, Black's king usually ends up castled on the opposite side from White's, and three squares carry almost all the tactics that follow: e6, where the bishop captures to strip the king's cover; d5, where the knight lands even at material cost to exploit pinned or overloaded pieces; and f5, where the pawn advances to open the f-file before Black's queenside counterattack gets there first. This guide separates the structure that makes each sacrifice sound from the structure that refutes it, with diagrams of the typical English Attack and Yugoslav Attack positions.
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Repertoire
After 5...a6, White chooses between the English Attack, sharper and more studied by Black, and 6.Be2, quieter and cheaper to prepare. This guide measures both with the engine, closes the black replies club players actually play, and shows the positions where the pretty move is the wrong one.
The Najdorf arises after 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6, and White's sixth move decides the kind of game ahead. This guide closes a whole White repertoire: the English Attack with 6.Be3, the cheaper 6.Be2, what to do against 6...Ng4, against 6...e6 and against the deviations that turn up at the club, plus the position where the most thematic move in the Sicilian goes from best to worst because of two pawn moves. Every evaluation was measured with Stockfish 19 at depth 22, from the lines published here.
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Repertoire
9.O-O-O launches White into a pawn race against Black's king while Black races on the queenside. We measured the main tabiya and the point where Black answers the h4 advance with ...h5 — the race is decided by who arrives first, not by who is better on paper.
The Yugoslav Attack arises from 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 Nc6 8.Qd2 O-O 9.Bc4 Bd7 10.O-O-O, when both sides castle to opposite wings and every advancing pawn opens lines against one's own king just as much as the opponent's. This guide measures the main tabiya and Black's most-tested reply to the h4-h5 advance with Stockfish 19, showing that White's edge here depends on precise move order, not on a line that "wins by itself".
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Repertoire
White accepts a wide pawn centre in exchange for development time; Black bets that centre is more of a target than a strength. We measured the main tabiya and the point where move order — O-O before Qd2 — decides half a pawn of evaluation.
The Exchange Variation arises from 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3, when White accepts doubled pawns and a wide centre in exchange for the bishop pair and space. Black attacks that centre with ...c5 and ...Qa5, and the line only works if White's move order is exact: this guide measures with the engine the point where a wrong order costs almost half a pawn of evaluation.
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Repertoire
4.e3 is White's most played plan against the Nimzo-Indian, and the main tabiya measures close to equal. The line where Black keeps the bishop with ...Ba5 hides a concrete trap we measured with the engine: only one move recaptures correctly on c3, and the rest loses material.
The Rubinstein Variation arises from 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3, White's soundest and most played plan against the Nimzo-Indian. The main tabiya, after the trade on c3, measures close to equal — the Nimzo-Indian is rightly respected as Black's most reliable defence against 1.d4. But the line where Black avoids the trade with ...Ba5 hides a tactical detail this guide measures precisely: a gap of over two pawns between the right move and the wrong one in the same position.
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Repertoire
The Catalan has a reputation as a quiet opening, and the reputation hides the main point: no Black reply on move four wipes out White's edge, and the capture on c4, the greediest-looking one, leaves White the most. What we measured with the engine, and where the long diagonal sends the bill.
The Catalan Opening (1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2) is a Queen's Gambit in which the light-squared bishop goes to g2 and presses along the h1–a8 diagonal. This guide measures four Black replies on move four with Stockfish 19, shows how White regains the pawn in the Open Catalan, where holding it with ...b5 drops the a8 rook, which plan keeps the edge in the Closed Catalan, and what changes after the check 4...Bb4+.
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Repertoire
d3 is often sold as the way to dodge the Marshall Attack. The engine doesn't back the dodge: the Marshall measures +0.41 for White, more than the d3 lines. What d3 buys is something else, positions without forced theory, with two captures on e5 that lose the game.
A White repertoire in the Ruy Lopez (1.e4 e5 2.Nf3 Nc6 3.Bb5) built around d3: 4.d3 against the Berlin and 5.O-O Be7 6.d3 against 3...a6. The guide uses Stockfish 19 to measure when c3 can be played, the two captures on e5 that lose, the bishop's retreat to c2 against ...Na5, the Nbd2–f1–g3 manoeuvre and Noah's Ark, and shows why avoiding the Marshall Attack is not, on evaluation, the reason to play d3.
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Competition
The usual advice is to forget the loss and go for the next game. Forgetting doesn't work, and going for it is exactly what turns one loss into two. What works is closing the lost game in three lines and deciding, before you sit down, what the next one is going to be.
An unexpected loss in the middle of a tournament costs less through the point itself than through what it does to your decisions in the next round. This guide explains what a loss changes in a Swiss system and what it doesn't, describes the most common rebound mistake, playing to make up for it, and sets out a three-step mental reset for the break: close the game in three lines, separate the result from the decision, and fix the plan for the next game before you sit down.
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Competition
A tiebreak is not a coin toss. In an eight-player Swiss with three players tied for first, Buchholz, cut-1 Buchholz and Sonneborn-Berger crown three different winners — because each criterion measures something different, and the regulations choose which one counts before round one.
When two or more players finish on the same score, the tournament applies, in order, the tiebreaks set out in its regulations. The most common are Buchholz (the sum of the opponents' scores), cut-1 Buchholz (the same sum without the weakest opponent), Sonneborn-Berger (opponents' scores weighted by your result against each), direct encounter and number of wins. Each rewards something different, and the same standings can change hands depending on the order chosen.
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Competition
Chess-Results looks like nothing more than an ugly standings table. It is really the arbiter's file published in real time: if you know where to click, you find next round's board, every player's tiebreak and an opponent's history before you sit down across from them.
Chess-Results is the results server fed by Swiss-Manager, the program many arbiters use to pair tournaments. Each tournament has a page with the entry list by strength, the pairings for every round, round-by-round standings with tiebreaks, the crosstable and export to Excel and PDF. The home page offers tournament, player and game searches.
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