Atlantan IM Arthur Guo

finished in a tie for third place with many other players in the recent 2023 US National High School Championship, a half point behind the two leaders. I would like to inform you of the names of the winners, but after being unable to access the USCF webpage contained the information I contacted my friend, Mulfish, who reported, “The US Chess website has had service outages off and on for the last two days. Once it’s up you should be able to get to the crosstable. Once it’s working again you shouldn’t have any trouble.” Some things never change…
Arthur Guo vs Avi Harrison Kaplan

2023 US National High School Championship Rd 4
B40 Sicilian defense
- e4 c5 2. Nc3 a6 3. g3 b5 4. Bg2 Bb7 5. d3 d6 6. Nh3 e6 7. O-O Be7 8. g4 Nf6 9. g5 Nfd7 10. f4 Nc6 11. Ne2 Nb6 12. Ng3 d5 13. f5 exf5 14. exf5 g6 15. f6 Bd6 16. Re1+ Kd7 17. Nf4 Ne5 18. c3 Re8 19. d4 Nec4 20. b3 Na5 21. Nd3 c4 22. Ne5+ Bxe5 23. dxe5 Qc7 24. Bf4 Kd8 25. Ne4 Nc8 26. b4 Qd7 27. Nc5 Qc6 28. Nxb7+ Qxb7 29. bxa5 1-0
https://lichess.org/broadcast/2023-us-national-high-school-championship/round-4/kOmWdoHl
Stockfish still considers 2 Nf3 best. In reply to the game move, 2 Nc3, SF considers the move played in the game, 2…a6, best. The move 2…Nc6 has long been favored by we humans, with 365Chess.com showing almost 50,000 games with the move. 2…d6 and 2…e6 are almost tied with each showing over 12,000 games. The best move, according to the ‘Fish, 2…a6, has only been seen in about 3,000 games. 3 g3 has been the far and away favored by humans in 1344 games. Then come 3 Nf3 with 485 games, followed by 3 f4 with 469 games. 3 a4 shows 417 games, while the SF best, 3 Nge2 has only been seen in 2015 games. 3…b5 has been the most often played move, and SF considers it best. Ditto for 4 Bg2, and 4…Bb7. Arthur played 5 d3, as have most other players, but SF will play 5 Nge2. Mr. Kaplan played 5…d6, but 5…e6 has been seen in ten times more games, possibly because SF considers it best. Mr. Guo played 6 Nh3, and SF considers it best, but 6 f4 has been the most often played move. SF will play 6…g6. After 7 0-0, the move 7…Nd7 has been played in 9 games; 7…Nf6 (8); 7…Nc6 (5); 7…Be7 (3); followed by the only game featuring the move SF considers best:
Alexandr Predke (2632) vs Sergey A Fedorchuk (2633)
Event: Tal Memorial Rapid 2019
Site: Riga LAT Date: 07/17/2019
Round: 10.6 Score: 0-1
ECO: B23 Sicilian, closed
1.e4 c5 2.Nc3 a6 3.g3 b5 4.Bg2 Bb7 5.d3 e6 6.Nh3 d6 7.O-O b4 8.Ne2 Nf6 9.f4 Nbd7 10.Nf2 h5 11.h3 Qc7 12.a3 a5 13.c3 bxc3 14.bxc3 Be7 15.a4 Rb8 16.c4 Rd8 17.Nc3 Nb8 18.Nb5 Qc8 19.Bb2 Nc6 20.e5 dxe5 21.fxe5 Nd7 22.Qe2 h4 23.g4 O-O 24.Rae1 Qb8 25.Bc3 Nd4 26.Bxd4 cxd4 27.Nxd4 Nc5 28.Nc6 Bxc6 29.Bxc6 Nxd3 30.Nxd3 Qb6+ 31.c5 Qxc6 32.Rc1 Rd4 33.Qf3 Qxf3 34.Rxf3 Rfd8 35.c6 Rc8 36.Nb2 Rd5 37.Rb3 Rc5 38.Rxc5 Bxc5+ 39.Kg2 Bd4 40.Nc4 Rxc6 41.Nxa5 Ra6 42.Rb5 Bc3 43.Nc4 Rxa4 44.Nd6 Rf4 45.g5 Kh7 46.Nc8 Kg6 47.Nb6 Kxg5 48.Nd7 Kg6 49.Nf8+ Kf5 50.Nd7 Bd4 51.Ra5 Rf2+ 52.Kh1 Rf3 53.Kg2 Rg3+ 54.Kh2 Bg1+ 55.Kh1 Be3 56.Nb8 Rxh3+ 57.Kg2 Rg3+ 58.Kh2 Bf4 59.Kh1 h3 60.Nc6 Rd3 61.Ra1 g5 0-1
https://www.365chess.com/game.php?back=1&gid=4206004&m=15
Gus Huston

vs Arthur Guo
2023 US National High School Championship Rd 5
B40 Sicilian defense
- e4 c5 2. Nf3 e6 3. c3 d5 4. exd5 Qxd5 5. d4 Nf6 6. Na3 a6 7. Nc4 Nbd7 8. Be2 Qc6 9. O-O Qc7 10. a4 b6 11. Nfe5 Nxe5 12. Bf4 Nd5 13. Bxe5 Qc6 14. Bf3 f6 15. Bg3 cxd4 16. Bxd5 exd5 17. Re1+ Kd8 18. Qxd4 Bc5 19. Qd2 Ra7 20. b4 Rd7 21. Ne5 fxe5 22. bxc5 bxc5 23. Rxe5 Bb7 24. Rae1 Kc8 25. Qf4 Rd6 26. Re6 d4 27. f3 Rxe6 28. Rxe6 1-0 https://lichess.org/broadcast/2023-us-national-high-school-championship/round-5/m6sp9J3n
The third move of the game by Mr. Houston has been seen in 9504 games. 3 d4 has been played in almost 100,000 games. 3 c3 is second with 9504 games. 3 Nc3 has been played 9,259 times. It is the move favored by Stockfish. After 4… Qxd5 the move played in the game, 5 d4 has been played in 1844 games. The move favored by Stockfish, 5 Be2 has been seen in action only 43 times. 5…Nf6 followed. Stockfish would play 5…cxd4, which would be a Theoretical Novelty. After 7…Nbd7 Gus played 8 Be2. Stockfish would play 8 a4, for what should be obvious reasons. That brings us to this position:

I expected Arthur to play 8…b5, which is the choice of SF. The move played, 8…Qc6, was shocking. Stockfish says, “Inaccuracy. b5 was best.” Stockfish gives the move played in the game a dubious (?!) distinction. After 8 Be2 the ‘Fish shows white with an advantage of +0.3. After moving the Queen for the second time in the opening, SF shows the white advantage improving to +0.9. Granted, that is not much of an increase, but it caused me to think of something one Legendary Atlanta area Chess Coach is more than a little fond of saying when a student retreats a piece that has no business retreating: “There you go running back scared again!” Sometimes he will exchange “scared” to “crazy” depended on the student. One of the “rules” of Chess is to not move an already developed piece the second time before completing development. The computer Chess programs have shown that particular reasoning needs to be rethought, but when teaching neophytes, it is best for them to learn the rules before teaching them when to break the rules. Arthur’s game went downhill from here. Stockfish shows him with a lost game, down by -1.8, after only eleven moves. After his 12th move, Arthur was down by -2.5. It was all over but the shoutin’… This is one of the worst games Arthur has played in some time. Let us hope it is an aberration.