Round 7 in numbers

Uzbekistan and China came in first and second. Nodirbek Abdusattorov beat Ding Liren on board 1 with White in 45 moves, at 96.9% accuracy. Replay Nodirbek Yakubboev beat Yu Yangyi on board 3, also in 45, and has five wins and a draw from six games. Replay Wei Yi and Javokhir Sindarov drew board 2 in 53, the highest-rated game of the round at 2752 against 2778, and both played it at over 98%. Replay Xu Xiangyu and Mukhiddin Madaminov drew board 4 in 34.

That is 3–1 and the best team performance of the round, 2907 against opposition averaging 2707. Uzbekistan have 14 match points out of 14 and lead by two, from the Netherlands, India, Germany, Azerbaijan and Armenia.

Armenia and the USA shared it 2–2. Robert Hovhannisyan, 2642, beat Wesley So, 2774, with Black in 60 moves. So's g-pawns ended up three deep on g2, g5 and g6 after 25.hxg6, which the site calls an Irish Pawn Centre: three pawns on one file. Replay Awonder Liang won board 4 back against Gabriel Sargissian, Haik Martirosyan held Fabiano Caruana in 46, and Shant Sargsyan and Hans Niemann drew in 31. Replay

Greece came into the round fourth and lost 3½–½ to Azerbaijan. Aydin Suleymanli, Mahammad Muradli with Black and Rauf Mamedov won, and Nikolas Theodorou held Shakhriyar Mamedyarov in 30. Replay

The Netherlands beat Bulgaria by the same score. Anish Giri beat Arkadij Naiditsch in 64, Jorden Van Foreest won with Black in 76, and Loek Van Wely beat Martin Petrov in 47. Radoslav Dimitrov saved Bulgaria's half point on board 4 against Casper Schoppen, promoting to a knight with check on the way, 69.e8=N+. Replay The Netherlands are second now, on tie-break.

England against India came down to board 4. Praggnanandhaa beat Nikita Vitiugov with Black in 31, at 97.6% and without a single mark from Lichess. Replay Erigaisi Arjun and Michael Adams drew in 40. Luke McShane beat Nihal Sarin in 88, and the queens stayed on until move 74, the latest queen trade of the event. The award for that is called Separation Anxiety. Replay

That left Gukesh against Daniel Howard Fernandez, and Gukesh won it with White in 48 moves, so India took the match 2½–1½. It was not a tidy finish. After the time control Gukesh was four and a half pawns up on the evaluation, let it go back to level, got it back, let it go again, and was handed it a third time with 48...Qc2. Lichess marked six blunders in those last eight moves, three on each side, with Gukesh down to three and a half minutes. Replay

The world champion is on six points from seven at this Olympiad, five wins and two draws, and four of the wins came in five games on board 4. India are on 12 match points, two behind Uzbekistan.

Germany beat Türkiye 3–1, and both Svane brothers won: Frederik beat Isik Can with White in 59, Rasmus beat Vahap Sanal with Black in 55. Replay

On board 1, Vincent Keymer and Yagiz Kaan Erdogmus drew in 104 moves. Each of them lost one centipawn per move on average, 99.7% and 99.8% accuracy, and Lichess did not mark a single inaccuracy, mistake or blunder for either of them in all 104. The award for the longest game without a mark is called Ice Cold, and they share it, a record for the event. Replay

It is tied as the cleanest game of the round with Chan Kim Yew of Malaysia and Nico Georgiadis of Switzerland, a 41-move draw in which Georgiadis's 99.9% was the best of the Open. Replay Germany's four games averaged 98.7%, the most accurate team of the round. It was also 98.7% in round 5.

China and Kazakhstan, first and second, drew. Zhu Jiner and Bibisara Assaubayeva drew board 1 in 48 at 98.4% and 99.0%, and at 2550 against 2536 it was the highest-rated game the Women's section has had at this Olympiad. Replay Alua Nurman and Song Yuxin drew in 46. Then Lu Miaoyi beat Meruert Kamalidenova in 39 on board 3 and Elnaz Kaliakhmet beat Yan Tianqi in 35 on board 4. Replay Both teams are on 13, with China ahead on game points, 22½ to 20½.

India beat Germany 3½–½, the best team performance of the section, 2651 against opposition averaging 2351. Humpy Koneru beat Dinara Wagner with Black in 48, Divya Deshmukh beat Hanna Marie Klek with Black in 40, and Vaishali and Elisabeth Paehtz drew in 67. Replay On board 4, Savitha Shri beat Lara Schulze in 89 moves. Six games at this Olympiad, six wins. Replay

Georgia beat Poland 2½–1½, although Oliwia Kiolbasa, an IM, beat Nana Dzagnidze on board 1, the only grandmaster in the section beaten by a non-grandmaster today. Kiolbasa's c-pawns were tripled from move 7, 7.bxc3. Replay Nino Batsiashvili beat Aleksandra Maltsevskaya in 36 and Lela Javakhishvili beat Klaudia Kulon with Black in 92. Replay

Mongolia, seeded 15th, beat France, who came in third, 2½–1½. Khishigbaatar Bayasgalan won with Black against Sophie Milliet in 41, and the other three boards were drawn. Replay The USA beat Switzerland 3–1 on wins for Carissa Yip against Alexandra Kosteniuk and Tatev Abrahamyan against Ghazal Hakimifard. Replay Behind China and Kazakhstan, five teams are on 12: India, Bulgaria, Georgia, Armenia and Mongolia.

Three games in the Open went 130 moves or more, and all three were drawn. The longest, 138 moves, was Madol Garang Panthou Joh of South Sudan against Kevin Noboa Silva of Ecuador, one move short of the event record from round 3. Noboa Silva made 80 knight moves in it, another event record, and one of the knights landed on the four centre squares 22 times, also a record. South Sudan and Ecuador drew the match 2–2 after 320 moves over the four boards, the longest match of the round. Replay

Diego Rafael Di Berardino of Brazil played 86 moves with under five minutes on the clock, the first of them on move 32, in a 131-move draw with Muhammad Khusenkhojaev of Tajikistan. That is a record too. Replay In the Women's section Khady Niang of Senegal gave 24 checks in a row, from move 39 to move 62, against Adalina Luiz of Sao Tome and Principe: the longest king hunt of the event in either section. It was a draw. Replay

Scotland beat Jamaica 4–0 with two underpromotions. Rishi Vijayakumar won with 57.f8=N+ on board 3, and on board 4 Konstantinos Megalios finished the game with a rook promotion that was also checkmate. 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

The biggest upset was the same size in both sections, 432 rating points. Khaled AlJamaat of Qatar, 1810, beat John Ranel Morazo of Palau, 2242, in 52. Replay Hannah Wilson of Barbados, 1835, beat Devindya Oshini Gunawardhana of Sri Lanka, 2267, in 43, the biggest upset of the Women's section so far. Replay

Donkeng Hussel of Cameroon lost the queen on move 18, straight after a move Lichess marked as a blunder, and won in 40 anyway. The site calls that a Botez Gambit, after the Botez sisters, who made hanging the queen on stream a running joke. Replay

Age, in a line. Julia Lebel-Arias of Monaco, born in 1944 and the oldest player at the Olympiad, beat Norotiana Fararindra Rabenandrasana of Madagascar in 63. Replay Rachelle Hoareau of the Seychelles sat across a 59-year gap for the second round running, this time from Dejw Wrensford of the US Virgin Islands, born 2014, who won. Replay

Lichess analyses every finished broadcast game on its own servers, and by the end of the night 100% of Open moves and 99.8% of Women's moves had an evaluation, so the accuracy and blunder numbers are Lichess's, not mine. Relay clocks are chaos, so the script looks for the jump where the 30-minute bonus actually lands instead of trusting move 40. Forfeits and unfinished games never count for move stats, ties are shown instead of broken, and every award links to the exact move.

One thing worth knowing about accuracy, with a 104-move game at the top of this post. Lichess scores each move by how much of your winning chances it gives away, so a move that keeps a level position level costs nothing. A long, balanced ending is full of those moves, which makes it the easiest place to reach 99%. That doesn't take anything away from Keymer and Erdogmus, since nobody else went 104 moves without a mark. But it's why I put the length and the result next to every accuracy figure, and why a 99% in a quiet draw and a 97% in a sharp win are not really the same kind of number.

Round 8 is tomorrow. Germany play Uzbekistan and India play Azerbaijan at the top of the Open, and in the Women's section China play Georgia and Kazakhstan play India. 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.