Canada's round 6 opponents at the Olympiad: how Cyprus and Mexico play

Short answer

In round 6 of the 46th Chess Olympiad, on 21 September 2026, Canada face Cyprus in the open section on board 27 and Mexico in the women's section on board 18. Drawing on 675 classical games broadcast by Lichess over the last three years, this article sets out each player's repertoire by colour, the lines where each of them scores below their own average, where the engine finds the mistakes, and what the online repertoire adds — always with the number of games beside every percentage, because that is what says how much of the dossier holds.

Event: 46th FIDE Chess Olympiad

How this was compiled: Compiled on 20 September 2026, with round 5 finished and round 6 not yet played: it starts on 21 September at 3pm Samarkand time (10:00 UTC). The pairings were checked on chess-results; the official PGN that names each team's line-up is only published when the round starts, so this dossier covers both full squads rather than four boards each. The repertoire uses the 675 over-the-board classical games from the last three years broadcast by Lichess and linked to each player by FIDE ID — 320 for the Cypriot squad and 355 for the Mexican one. The mistake profile measures each player's 12 most recent games with Stockfish 19 at depth 16; for Paula Sofía Hernández Díaz and Tania Miranda Rodríguez it was 11, because one game each failed to parse and is recorded as a failure. Every move quoted in this text was re-measured at depth 24, with a dedicated search and a cleared hash. The blitz and rapid repertoire comes from verified Chess.com accounts, over a 90-day window.

The essentials in a few lines

• In round 6, on 21 September 2026, Canada face Cyprus in the open section (board 27) and Mexico in the women's section (board 18). Both matches are level on match points, with Canada ahead on the first tiebreak in each. Line-ups are only published when the round starts, so this dossier covers all ten players in the two opposing squads.
• Mexico's highest percentages belong to its lowest-rated player: WCM Mia Fernanda Guzmán García, rated 2007, scores 77.9% with White and 73.3% with Black. Her 77 games are under-13, under-14 and under-16 events. The squad's highest-rated player, WIM Zenia Corrales, scores 45.7% with Black.
• Zenia Corrales has the widest colour gap of all thirty players covered this round: 84.8% with White in 23 games against 45.7% with Black in 23. Against her, 1.d4 has held her to 28.6% in 7 games.
• Cyprus's fifth board, Savvas Konstantinides, is a child. He has no title, is rated 1966 and his 56 classical games are almost all under-12 and under-14 world and European championships — which is also why his 71.2% with White and 38.3% with Black should be read as a rating on the way up.
• Paula Sofía Hernández Díaz and Scarlett Daniela Olea Valle both have their worst engine moments in the same game: they played each other in round 4 of Mexico's under-20 national championship. One walked into mate in five from a lost position; the other missed the mate and won anyway, thirteen moves later.

The round 6 picture

Canada's two teams come from opposite rounds. The open team lost 0.5–3.5 to Spain and sits on 6 match points with 12.5 game points, level with Cyprus on match points and a point ahead on the first tiebreak. The women beat Costa Rica 4–0 and are on 7 match points with 15.5 game points, level with Mexico and a point and a half ahead. In both matches Canada is the higher seed — 41st against 81st in the open, 38th against 54th in the women's — and ahead on the tiebreak, which is a more comfortable place than the one it occupied in round 5.

Cyprus has the jagged record of a small federation with one grandmaster: 3–1 over Djibouti, 1.5–2.5 to Australia, 3.5–0.5 over Guyana, 0.5–3.5 to Montenegro, 3–1 over South Sudan. Mexico has been steadier — four wins and a draw with Cuba in round 5, with one loss, 1–3 to France in round 2.

The samples are solid on both sides: from 32 to 101 classical games broadcast in three years, with no player flagged as low confidence. That is 675 games in total, 320 Cypriot and 355 Mexican. Andreas Kelires has the smallest sample of the ten, 32 games, for the ordinary reason that he plays little broadcast classical chess outside the Greek team league.

One caution governs both squads and it is the same one, pointing in opposite directions. A percentage compares a player with the field they played, and these ten did not play the same field. Two of the Mexicans spent three years in junior sections, one of the Cypriots is twelve to fourteen years old across his whole sample, and the strongest player on either side plays almost exclusively in a national team league. Where a number owes more to the calendar than to the player, this article says so rather than letting the table imply otherwise.

Cyprus: one grandmaster, three FMs and a child on board five

Cyprus fields a squad with one 2532 and four players between 1966 and 2244, and the calendar explains the shape of most of it. Rafail Antoniou, Alexandros Isaakidis and Konstantinos Michaelides play the Cyprus closed championship, the Pafos internationals and Greek opens; Antoniou also plays the world and European junior sections. Andreas Kelires plays the Greek team league and little else. Savvas Konstantinides plays youth chess, and that deserves its own paragraph.

Konstantinides is the fifth board and the youngest player in this article. Of his 56 classical games, eleven are the 2026 World Youth under-14, eleven the 2024 World Cadet under-12, nine the 2025 European Union Youth under-12, and six the 2025 World Cadet under-12. His rating has moved from 1839 to 1976 inside the sample. The 71.2% with White and 38.3% with Black are real numbers about a player who is still forming, and the gap between them is the most likely thing in the whole dossier to be out of date by Monday. What the dossier can say with a usable sample is that with White, after 1.e4 e5 2.Nf3 Nc6, he scores 35.7% in 7 games, against a 71.2% average.

Alexandros Isaakidis is the player Canada should look at twice. He scores 75.9% with Black in 27 games and 62.9% with White in 31 — one of only two players in this round who is clearly better with the black pieces. His Black repertoire is the Caro-Kann, which accounts for three of his four most-played Black openings, and against him with White the dossier finds no first move that opens an edge. The one weak line registered, the King's Indian with 2...g6 as White, has three games and does not support a plan.

Rafail Antoniou has the largest Cypriot sample, 101 games, and the widest repertoire: 1.Nf3 and 1.c4 rather than 1.e4, with the Zukertort and the English among his most-played White openings. He makes 63.0% with White and 52.1% with Black, and the dossier's suggestion against him is 1.Nf3, where he has scored 25.0% in 4 games — four games, which is an indication, not a plan. Against 1.c4 he replies 1...e5 and scores 58.3% in 6.

Konstantinos Michaelides is the most predictable of the four and the most efficient at it: the London System appears in nine of his 39 White games, more than twice any other opening, and he scores 77.8% in them. Overall he makes 67.9% with White and 61.8% with Black. Canada will know what is coming if he has White; the question is whether that helps, given the result.

Andreas Kelires plays 32 classical games in three years and the dossier reflects that: 66.7% with White in 18 and 64.3% with Black in 14, with the King's Indian Attack as his most-played White set-up, in five games. With a sample that size there is no weak line worth publishing. What there is, and it is unusual, is the mistake profile — and that is in the engine section.

Mexico: the squad where rating and results run in opposite directions

This squad is the clearest illustration in the round of why a percentage needs its context printed beside it. Mia Fernanda Guzmán García's 77 games are the 2026 World Youth under-14, the Pan-American youth under-14, the under-13 section at Aguascalientes, the under-16 at the national CONADE games and the women's section of Mexican nationals. Scarlett Daniela Olea Valle's 48 are under-18, under-20 and university championships. Their 74 to 78 per cent describe girls winning their age groups. Zenia Corrales's 46 games are the Mexican absolute and women's nationals and the 2024 Olympiad, against adults.

Zenia Corrales is nonetheless the one the dossier can attack most precisely, because her gap is enormous and it has a direction. She scores 84.8% with White in 23 games — 17 wins, 5 draws, 1 loss — and 45.7% with Black in 23. That 39-point spread is the widest of all thirty players covered this round. Against her, the dossier recommends 1.d4, where she has scored 28.6% in 7 games with medium confidence; her Black repertoire is the Sicilian, which is where most of those losses live.

Paula Sofía Hernández Díaz has the largest Mexican sample, 94 games, and the most usable weak line of the squad: with Black against the Sicilian with 2...d6 she scores 31.8% in 11 games, almost 25 points below her own average with that colour. Eleven games is a real sample. Against 1.d4 Nf6 2.c4 e6 she is at 45.5% in 11, the same direction with a smaller gap, and against her as White the dossier points at 1.d4, which has held her to 50.0% in 18 games with high confidence.

Tania Miranda Rodríguez plays the most decisive chess of the squad: 23 wins, 5 draws and 16 losses with White in 44 games. Almost nobody in this article draws less. Her two medium-confidence pointers both involve the Sicilian with 2...d6 — 27.8% in 9 games when she has White against it, 28.6% in 7 when she plays it with Black — and the Spanish with 3...a6 has held her to 45.0% in 10 as White. Her calendar is also the strongest of the five: the 2026 American Continental and two Continental women's championships.

Mia Fernanda Guzmán García and Scarlett Daniela Olea Valle are the two the dossier describes least usefully, and saying so is the point. Their percentages are the highest in the squad and their opposition is the youngest; the weak lines the dossier registers for them sit at 50.0% and 56.2%, which are only weak relative to averages above 73%. Olea Valle's 73.9% with White and 74.0% with Black are the most symmetrical pair of numbers in this article, and with 23 and 25 games behind them they are a description of her age group, not a prediction about an Olympiad board.

Where the engine finds the mistakes

The table gives average centipawn loss per move by phase, with the number of moves measured beside each figure. The opening column runs from 5 to 9 for all ten players and says more about preparation than about play. What follows the opening is where these ten stop looking alike.

Andreas Kelires is the outlier, and in the direction his rating predicts: 11 in the middlegame over 226 moves and 15 in the endgame over 183, both the lowest of the round. His worst moment across twelve games is a loss of 354 centipawns, the smallest worst moment in this series so far. Re-measured at depth 24, that move is a genuine mistake, and a costly one: in round 7 of the 2025 Greek team championship he was plus 4.0 against Konstantinos Megalios and played 44.c7 instead of 44.Rxd5. The evaluation dropped to plus 0.05 and the game was drawn.

Alexandros Isaakidis has the most expensive endgame on the Cypriot side, 49 over 120 moves, and one move explains a good part of it. In the Thessaloniki team cup final in April he reached a pawn endgame a rook's worth ahead — plus 5.8 at depth 24 — and played 83...e5. At depth 24 that move throws the whole thing away: the position becomes plus 0.09, and the game was drawn. The shallow pass had also flagged his move 79 as a 2,444-centipawn error; at depth 24 it is worth the same as the engine's suggestion, and it does not belong in this article except as an example of why re-measuring is mandatory.

Savvas Konstantinides has the highest middlegame figure of the round, 49 over 275 moves, which is what a strong fourteen-year-old's games look like when an engine reads them. His worst moment is also real: in round 10 of the 2026 World Youth under-14 he was plus 1.8 and played 21.Kh1, and the evaluation fell to minus 6.1. He won the game anyway, which is also what a strong fourteen-year-old's games look like.

On the Mexican side the two highest endgame figures — Olea Valle's 74 and Hernández Díaz's 63 — come substantially from the same game, and it is a game they played against each other: round 4 of the 2026 CONADE under-20 national championship, on 21 May, which Hernández Díaz won as White in 48 moves. At move 34 Olea Valle was already lost by six and a half pawns and played 34...Kh5, which turns a lost position into mate in five. At move 35 Hernández Díaz had that mate in five and played 35.Qg7, dropping to plus 8.8 — still completely winning, and she converted it thirteen moves later.

Both of those moves are in the dossier's worst-moments list and neither changed a result. That is the honest description: one player was already lost, and the other missed a faster finish in a game she won. Keeping them in the article without that context would misdescribe both.

Mia Fernanda Guzmán García has the cleanest Mexican profile, 21 in the middlegame and 24 in the endgame, and Tania Miranda Rodríguez the most lopsided: 42 in the middlegame over 229 moves against 20 in the endgame over 233. If Canada draws her, the game is decided before the simplification.

Blunder counts are deliberately absent from the table. The classification uses uncapped loss, so a player who is already winning and picks a slower mate collects a blunder for a move that changes nothing — exactly what happened to Hernández Díaz above. Average centipawn loss caps each evaluation at 1000 and does not suffer from that.

What the online accounts show, and what they do not

This section answers a different question from the one above, which is why it is kept separate. A blitz repertoire is usually wider than a classical one, and what somebody plays with three minutes is not what they prepare for a five-hour game. It tells you what they know, not what they will play tomorrow.

Alexandros Isaakidis has the largest online sample of the round, 300 games in 90 days on the account k_a_i_s_s_a, and the contrast with his classical dossier is the sharpest of the ten. Over the board he is the squad's best player with Black at 75.9%; online he is at 39.0%. The gap is not a contradiction — a 300-game blitz pool is a different opposition and a different game — but it is a reminder that the two sources answer different questions, and that the over-the-board figure is the one that describes an Olympiad board.

Paula Sofía Hernández Díaz has 157 games, at 57.2% with White and 56.8% with Black, and her only online pointers sit at three and four games, which is not enough. Konstantinos Michaelides and Andreas Kelires have 17 games each: Kelires scores 72.2% and 75.0% there, Michaelides 55.6% and 62.5%. Seventeen games is a small sample and is reported as one.

Tania Miranda Rodríguez, Scarlett Daniela Olea Valle and Zenia Corrales have verified accounts with no games in the window. The account exists and is idle, which is different from the account not existing.

Three opponents are absent from this section because no account could be verified. Savvas Konstantinides and Mia Fernanda Guzmán García have no titled account under their names. Rafail Antoniou is the case worth explaining: Chess.com's own player page for him links a member profile with a verified FM title and his exact real name, which would qualify under the third criterion — but that profile is closed, has not been online since April 2026, and declares Norway against a Cypriot FIDE record. A closed account with a country mismatch would add nothing and could attribute a stranger's games to an athlete, so it was left out. Leaving a player out is a decision, and decisions belong in the text.

What to watch in round 6

Against Cyprus, the preparation splits by board. Andreas Kelires offers nothing to a repertoire search — 32 games, no weak line, the cleanest engine profile of the round — and the honest advice against him is to play the position, not the preparation. Isaakidis is the opposite of what his rating suggests with Black and should be met accordingly. The two youngest, Antoniou and Konstantinides, are the ones whose numbers a Canadian second can actually use, with the caveat that a fourteen-year-old's dossier ages faster than anybody else's.

Against Mexico, the single most reliable number belongs to Hernández Díaz: 31.8% in 11 games with Black against the Sicilian with 2...d6, against a 56.5% average. Eleven games is the largest sample behind any Mexican recommendation here. The second is Corrales, whose colour gap is so wide that the board she plays matters more than the line she meets: with White she is the strongest player in the squad, and with Black she is the weakest.

And there is the thing the table cannot show. Two of the five Mexicans played each other in a national under-20 championship four months ago, and one of them won. Squads that grow up together know each other's repertoires better than any dossier does — which is an argument for reading these five as a team rather than as five separate files.

Once the round starts and the official PGN carries the line-ups, the dossier file attached to this article switches to showing the four boards and each board's game, with no change to the text. Until then, what is here is the full squad — which is what there is to prepare on the eve of a round.

Frequently asked questions

Update log

• 2026-09-20 — First publication, with the round 6 pairings checked on chess-results and the round not yet played: repertoire from the 675 classical games broadcast by Lichess, mistake profile with Stockfish 19 at depth 16, and the blitz and rapid repertoire of the verified accounts. Rafail Antoniou was left out of the online section: the account Chess.com's player page links is closed and declares a country that does not match his FIDE record. The dossiers cover both full squads; once the line-ups are published, the same file will show the four boards and each board's game.
• 2026-09-29 — The Olympiad ended on 27 September: Uzbekistan won the open and China the women's event. This coverage is no longer updated; the final result is in the standings story.

Sources

• 46th Chess Olympiad Samarkand 2026, Open — round 6 pairings — Chess-Results
• 46th Chess Olympiad Samarkand 2026, Women — round 6 pairings — Chess-Results
• Andreas Kelires — broadcasts under FIDE ID 5900727 — Lichess
• Andreas Kelires — Chess.com player page linking the member profile used for the online repertoire — Chess.com

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