Round 10 in numbers

Uzbekistan came in first and Armenia a point behind them, and Armenia didn't win a game. Nodirbek Abdusattorov beat Haik M. Martirosyan with Black on board 1 in 64 moves. Replay Javokhir Sindarov beat Robert Hovhannisyan with White in 35 Replay, and Mukhiddin Madaminov beat Gabriel Sargissian with White in 34. Replay Shant Sargsyan and Nodirbek Yakubboev drew the other one in 63. Replay That was the best team performance of the round, 2937 against opposition averaging 2637.

India beat Uzbekistan 2 by the same score, and two of the wins came with Black. Praggnanandhaa beat Jakhongir Vakhidov in 63 Replay, and Nihal Sarin beat Mukhammadzokhid Suyarov in 41. Replay Gukesh beat Ortik Nigmatov with White in 47 and is on 8½ from 10, seven wins and three draws. Replay

Ukraine beat China 3–1. Igor Kovalenko beat Ding Liren with White in 48 moves, and there were only six captures in the whole game. The site calls that the Pacifist, and no game of 30 moves or more had fewer today. Replay Roman Dehtiarov, 2508, won with Black against Kong Xiangrui on board 4 in 44. Replay

Hungary beat Spain 3–1 without a drawn game, and Black won three of the four. The one White won was the longest of the four: Richard Rapport beat David Anton Guijarro in 109 moves, and Anton Guijarro played 67 of them with under five minutes on his clock, the first of them move 38. Replay Peter Leko won with Black against Maksim Chigaev in 75. Replay

Germany beat France 3–1, and the Svane brothers both won again. Frederik beat Maxime Lagarde with White in 66 Replay, and Rasmus beat MarcAndria Maurizzi with Black in 49. Replay Vincent Keymer and Maxime Vachier-Lagrave drew board 1 in 82, the highest-rated game of the round. Replay

Germany, Ukraine and Hungary are all on 16, two behind Uzbekistan.

China and India drew 2–2, and both points came on the bottom boards. Lu Miaoyi beat Vantika Agrawal with White in 65 Replay, and Savitha Shri beat Zhai Mo with White, also in 65. Replay That's 8½ from 9 for Savitha Shri, eight wins and one draw. Zhu Jiner and Humpy Koneru drew board 1 in 34, the highest-rated game of the section. Replay

Kazakhstan beat France 2½–1½ and are one point behind China. Bibisara Assaubayeva beat Deimante Daulyte-Cornette with White in 34 Replay, and Sophie Milliet got one back for France, winning with Black against Meruert Kamalidenova in 63. Replay The match was decided on board 4, where Elnaz Kaliakhmet beat Pauline Guichard with Black in 101 moves, the longest game of the section. She was down to 31 seconds after move 67 and still won. Replay

Poland beat Mongolia 3–1, with two wins for White: Aleksandra Maltsevskaya against Turmunkh Munkhzul in 60 Replay and Alicja Sliwicka against Batkhuyag Munguntuul in 64. Replay Vietnam beat Indonesia 2½–1½. India, Poland and Vietnam are all on 16.

The USA were the team of the round, 4–0 against Israel and a performance of 2671 against opposition averaging 2271. Carissa Yip won with Black on board 1 in 39 Replay, and Irina Krush won with Black on board 3 in 31. Replay

Koundou Ballama Magaram Malaram of Niger was winning against Ahmed Houmairaou of the Comoros Islands from move 10. After 14.Qg5+ Kf8 she had mate in two, and after 17...c6 she had mate in one, 18.Qh8#. She played 18.c3. The site's Lucky Escape award is for a player whose opponent missed a forced mate, and one move is as short as it gets. Replay

1. 8
2. 7
3. 6
4. 5
5. 4
6. 3
7. 2
8. 1

1. a
2. b
3. c
4. d
5. e
6. f
7. g
8. h

Houmairaou stayed three points or more behind for 18 moves, from move 22 to move 39. That's called Tal's Dark Forest on the site, and 18 moves is the longest anyone in the Women's section has spent in it at this Olympiad. Then 39.Rc2 walked into 39...Rxc2#, and Black won. Replay

The Open had its own version on board 68. Jahnyiah Gumbs of Saint Vincent and the Grenadines had a forced mate in 13 after 53.Ke1 and let it go with 53...Qg3+. Replay The lead changed sides seven times in the game, and Nasse Igor of Vanuatu had mate in four after 70...Be8. Igor gave a check with the queen instead, 71.Qh7+, and at move 75 put the queen on e8 with check, where the bishop took it, 75...Bxe8. A queen lost straight after a move Lichess marks with a double question mark is called the Botez Gambit on the site, after the Botez sisters' running joke about hanging the queen. Gumbs won with a minute left on the clock. Replay

David Jeetlall of Saint Kitts and Nevis traded queens on move 5, 5.Qxd8+ Kxd8, the earliest queen trade of the Open today. Replay Four moves later Jeetlall castled queenside with check, 9.O-O-O+. Exel Ngoupet of the Central African Republic was down to a bare king from move 51 and played on for another 23 moves. Jeetlall made a queen on h8, 59.h8=Q, and with it still on the board a rook on g8, 69.g8=R. He won in 74. That's the second rook promotion from Saint Kitts and Nevis in two rounds, after Isabella Jeetlall's in round 9. Replay

The Open's other underpromotion was a knight. Mohamed-Mehdi Aithmidou of Morocco played 33.e8=N+ against Ahmed Abdullah S Alrehaili of Saudi Arabia and mated with the queen a move later, 34.Qf5#. Morocco won the match 3½–½. Replay

Julia Alboredo of Brazil mated with a pawn. She made a new queen on a1 against Miguelina De La Rosa Martinez of the Dominican Republic, 50...a1=Q, and four moves later the last move of the game was 54...fxg4#. It was one of three named mates in the Women's section today, and the Open had none. Replay

Jorden Van Foreest put a third queen on the board with 34.exd8=Q, taking a knight to do it, and beat Constantin Lupulescu in 40. The Netherlands beat Romania 2½–1½. Replay

Giulia Sala of Italy spent 39 minutes and 32 seconds on 16...Kh8 against Sofia Pogorelskikh of Serbia, and Lichess marked it as a blunder: 17.Qxd5 won a pawn and White was better from there on. The award for the longest think that ends in a blunder is Time Not So Well Spent. Pogorelskikh won in 47, and Italy and Serbia drew 2–2. Replay

The biggest upset in both sections was 388 points. Ragul Pillay of Seychelles, 1603, beat Ali Al-Ghasra of Bahrain, 1991, with White in 42 Replay, and Tansi Tung Wu of Chinese Taipei, 1573, beat Sarocha Chuemsakul of Thailand, 1961, with White in 41. Replay

Age, in a line. Mikhail Gurevich of Belgium, born in 1959, beat Abdalrahman Sameh Mohamed of Egypt, born in 2014, in 66 moves. Replay

Lichess analyses every finished broadcast game on its own servers, so the accuracy and blunder numbers are Lichess's, not mine. In the Open 100% of the moves have an evaluation. In the Women's section it's 77% this time: the round was set up again on Lichess after the games, and 87 of its 375 games are still without their analysis. The engine numbers and awards of that section count the games that have one. Relay clocks are chaos, so the script looks for the jump where the 30-minute bonus actually lands instead of trusting move 40. Forfeits never count for move stats, results are checked against chess-results every evening, ties are shown instead of broken, and every award links to the exact move.

This round's note is about results the wrong way round. Twice on the evening the relay had the moves right and the result reversed: a game that ends with White more than twelve points up, scored as a win for Black, and one in the Women's section the other way round. Two more games the relay had as wins were draws on the official tables. Lichess has corrected all four since, so the results here are the official ones. Four games of the Women's section are out of the move statistics because their recorded moves can't be the whole game, one of them a win in 11 moves from a level position. Their results count.

Round 11, the last, is tomorrow morning. Uzbekistan play Ukraine, India play Hungary and the Netherlands play Germany at the top of the Open. In the Women's section China play Vietnam, Poland play Kazakhstan and India play Georgia. Every round gets its own page, there are team standings with the official tie-breaks, and an overview of the whole event tracks the records as they fall. The site is unofficial and not affiliated with FIDE, the organisers or Lichess.

Got an idea for an award? Lichess comments and the r/chess round thread both reach me.

And thanks again to the Lichess broadcast team. Without the relay, none of this exists.