[Event "ch-NED KO 2026"]
[Site "Amsterdam NED"]
[Date "2026.07.09"]
[Round "3.2"]
[White "Tiviakov, Sergei"]
[Black "Van den Doel, Erik"]
[Result "1-0"]
[Annotator "Mark Crowther"]
[ECO "C77"]
[WhiteElo "2530"]
[BlackElo "2549"]
[WhiteFideId "-1"]
[BlackFideId "-1"]
[PlyCount "59"]
[GameId "2330766074692421"]
[EventDate "2026.07.04"]
[EventType "k.o."]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Bc5 7. Bg5 h6 8. Bh4 Be7 9. Nbd2 d6 10. c3 Na5 $146 ({Predecessor:} 10... Rb8 11. Nf1 O-O 12. Ne3 Ng4 13. Bxe7 Nxe7 14. h3 Nxe3 15. fxe3 a5 16. d4 a4 {1-0 Davtyan,A (2443)-Shonazarov,O (2317) St Petersburg Galeria op 2026 (7)}) 11. Bc2 c5 12. d4 exd4 13. cxd4 O-O 14. O-O Bg4 15. dxc5 dxc5 16. Qe1 Nh5 (16... Nd7 $11 17. Bg3 c4) 17. Bxe7 $14 Qxe7 18. e5 Rad8 19. b3 f5 20. h3 $36 {[%mdl 2048]} Bxf3 21. Nxf3 Nc6 22. Rd1 Nb4 $6 {This is where it starts to go wrong for black.} (22... Rxd1 $11 23. Qxd1 Nf4) 23. Rxd8 $16 Qxd8 24. Qb1 Nf4 25. Bxf5 Ne2+ $2 (25... Nbd3 $16 {was the only try.} 26. Be4 c4) 26. Kh2 $18 Nc3 (26... Nd4 {is tougher.}) 27. Be6+ Kh8 28. Qg6 Qd3 {[#]} 29. Nh4 Qxf1 (29... Qd8 30. Bf5) 30. Nf5 1-0

[Event "ch-NED KO 2026"]
[Site "Amsterdam NED"]
[Date "2026.07.11"]
[Round "4.3"]
[White "Tiviakov, Sergei"]
[Black "Vrolijk, Liam"]
[Result "1-0"]
[Annotator "Mark Crowther"]
[ECO "B22"]
[WhiteElo "2530"]
[BlackElo "2519"]
[WhiteFideId "-1"]
[BlackFideId "-1"]
[PlyCount "67"]
[GameId "2330768531186773"]
[EventDate "2026.07.04"]
[EventType "k.o."]

1. e4 c5 2. c3 e5 3. Nf3 Nc6 4. Bc4 Nf6 5. d3 Be7 6. O-O O-O 7. Re1 d6 8. Nbd2 Be6 9. Nf1 Qd7 $146 ({Predecessor:} 9... d5 10. exd5 Bxd5 11. Bxd5 Qxd5 12. Ne3 Qd7 13. Nc4 e4 14. dxe4 Qxd1 15. Rxd1 Nxe4 {½-½ Matko,O (2255)-Link,U (2057) HUN-chT2 Asztalos 2324 Hungary 2023 (6.2)}) 10. Bg5 Ne8 11. Ne3 h6 12. Bxe7 Qxe7 13. d4 {[#]} cxd4 14. cxd4 Bxc4 15. Nxc4 Nf6 16. d5 Nb8 17. b4 Rc8 18. Rc1 (18. Qd3 $14) 18... b6 $6 (18... Nbd7 $11) 19. Ne3 $36 {[%mdl 2048]} Na6 20. Qa4 (20. Qe2 $5) 20... Qb7 21. Rc6 Nxe4 $2 {This was already awkward but this just loses.} (21... Nb8 $16 {was worth a try.}) 22. Nf5 $1 $18 {[%csl Bd6,Be4][%mdl 64]} Nc3 {[#]} (22... g6 $142) 23. Qb3 $1 Qd7 (23... Rxc6 24. dxc6 Qb8 25. Qxc3) 24. Nxh6+ (24. N3h4 {was even better.}) 24... gxh6 25. Qxc3 Rxc6 26. dxc6 (26. Qxc6 Qxc6 27. dxc6 Nxb4 $17) 26... Qg4 (26... Qe6 27. a4 Nc7) 27. Qd3 $1 {[%csl Ba6,Bd6]} Nxb4 28. Qxd6 Re8 29. h3 (29. Nxe5 Nxc6 30. Qxc6 (30. Nxg4 $2 Rxe1#) 30... Rxe5 $11) (29. Qxh6 Re6 30. Qd2 Nxc6 $14) 29... Qc4 30. Nxe5 ({Stronger than} 30. Rxe5 Rxe5 31. Qb8+ (31. Nxe5 Qc1+ 32. Kh2 Qf4+ 33. g3 Qxf2+ 34. Kh1 Qf1+ 35. Kh2 Qf2+ 36. Kh1 Qf1+ 37. Kh2 Qf2+ $11) (31. Qxe5 Nxc6 32. Qc7 Qc1+ 33. Kh2 Qc4 $11) 31... Kh7 32. Qxe5 (32. Nxe5 Qc1+ 33. Kh2 Qf4+ 34. Kh1 Qc1+ 35. Kh2 Qf4+ 36. Kh1 Qc1+ 37. Kh2 $11) 32... Nxc6 $11) 30... Qc5 (30... Qd5 $142 31. Qxb4 Rxe5) 31. Qf6 ({Less strong is} 31. Qxh6 Rxe5 32. Rc1 Nc2 $16) 31... Qe7 32. Qxh6 Qe6 33. Qg5+ Kh7 34. Re4 1-0

