Yu Vs Maghsoodloo: Cutting Edge Dutch Theory

Computer programs have revolutionized opening theory in the game of Go with new books being published with regularity. The same is true for the Royal game but without the new books being published acknowledging how the new moves were obtained. For example:

The impact upon the Royal game has been great but what about the acknowledgement? How extensively have the computer Chess programs changed the way the game is played? Do human players find new moves these daze or do they sit back and let the programs crunch the numbers and use what is found?

Yangyi Yu (2763)

vs Parham Maghsoodloo (2644)

FIDE Chess.com Grand Swiss 2019 round 07

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. b3 b6 7. c4 Bb7 8. Nc3 e6 9. Bf4 a5 10. Rc1 Na6 11. d5 Nc5 12. dxe6 Nxe6 13. Be5 Bh6 14. e3 Ng4 15. Nd5 Nxe5 16. Nxe5 d6 17. Nd3 Rb8 18. a3 Re8 19. b4 axb4 20. axb4 Ng5 21. b5 Bg7 22. N3b4 Ne4 23. Nc6 Bxc6 24. bxc6 Nf6 25. Nc3 Kh8 26. Ra1 Ne4 27. Nxe4 fxe4 28. Ra7 b5 29. cxb5 Rxb5 30. Qa4 Rbe5 31. Bh3 Rf8 32. Bd7 h5 33. Qa6 Rc5 34. Qb7 Rc2 35. Qb3 Rb2 36. Qe6 Qg5 37. Qxe4 d5 38. Qe6 d4 39. Rb7 dxe3 40. Rxb2 Bxb2 41. fxe3 Rxf1+ 42. Kxf1 Qf6+ 43. Qxf6+ Bxf6 44. Ke2 Kg7 45. Kf3 Be5 46. Ke4 Kf6 47. Be8 h4 48. gxh4 Bxh2 49. Kd5 Bg3 50. Ke4 ½-½

1 d4 f5 2 g3 Nf6 3 Bg2 g6 4 Nf3 Bg7 5 O-O O-O 6 b3 (SF 250919 @ depth 46 plays 6 c4, expecting 6…d6 7 Nc3, which is the Leningrad Dutch. The CBDB shows SF 10 @ depth 43 also playing 6 c4, but SF 260819 prefers the move in the game)
6…b6

(Until recently 6…d6, known as the Leningrad Dutch, was invariably played. The CBDB shows 6…d6 having been played in 1100 games. 6…b6 has only been attempted a paltry 22 times. The game move, 6…b6, is the move of Stockfish 021019 @ depth 75; SF 10 @ depth 41 plays 6…Na6 with 7 c4 Rb8 following) 7 c4 Bb7 8 Nc3 e6

(The choice of Stockfish, which is a completely different way to play. IM Boris Kogan played 6 b3 but I cannot recall him ever facing an early b6 and would like to know what the Hulk would have thought of the mirror move. For 8…Na6 see Lemos vs Alvarado Diaz below) 9 Bf4 TN (This move, the choice of Komodo, is not shown at the CBDB or 365Chess. 9 Bb2 has been the most often played move. StockFish 10 plays 9 Rb1 while SF 120919 would play 9 Bg5, neither move has yet been seen in action) 9…a5 10. Rc1 Na6 11. d5 Nc5 12. dxe6 Nxe6 13. Be5 Bh6 14. e3 Ng4 15. Nd5 Nxe5 16. Nxe5 d6 17. Nd3 Rb8 18. a3 Re8 19. b4 axb4 20. axb4 Ng5 21. b5 Bg7 22. N3b4 Ne4 23. Nc6 Bxc6 24. bxc6 Nf6 25. Nc3 Kh8 26. Ra1 Ne4 27. Nxe4 fxe4 28. Ra7 b5 29. cxb5 Rxb5 30. Qa4 Rbe5 31. Bh3 Rf8 32. Bd7 h5 33. Qa6 Rc5 34. Qb7

34…Rc2?

(At the ChessBomb Stockfish gives 34…d5 as best, showing 34…Qh6; h4; and Be5. The following variation is shown: 34… d5 35. Qxc7 Qf6 36. Qf4 Qe7 37. Qh4 Bf6 38. Qh3 Qd6 39. g4 h4 40. g5 Bxg5 41. Qg4 d4 42. c7 Rxc7 43. Rxc7 Qxc7 44. Qxg5 Qxd7 45. Qxh4+ Kg7 46. Qxe4 dxe3 47. Qe5+ Kg8 48. fxe3 Qg4+ 49. Qg3 Qe4 50. Rxf8+ Kxf8 51. Qf4+ Qxf4 52. exf4 Kf7)

35. Qb3?

(As is often the case in top level Chess these daze one ‘red move’ follows another ‘red move’ over at DaBomb. Back to back, or double blunders by the best human players happens with regularity. I’ve no idea why this is happening. Maybe double vision

is the cause. Any ideas? This is the best variation according to the Fish after crunching numbers for all of fifteen seconds) 35. Qxc7 Qxc7 36. Rxc7 Bf6 37. Be6 Bd8 38. Rc8 Be7 39. Rxf8+ Bxf8 40. Bd5 Rc5 41. Bxe4 g5 42. Rd1 Be7 43. f4 Kg7 44. Bd5 gxf4 45. gxf4 Bd8 46. Kf2 Kf6 47. e4 Rc3 48. Rb1 Rc2+ 49. Ke3 Ba5 50. Rb7 Rxh2 51. Rf7+ Kg6) Rb2 36. Qe6 Qg5 37. Qxe4 d5 38. Qe6 d4 39. Rb7 dxe3 40. Rxb2 Bxb2 41. fxe3 Rxf1+ 42. Kxf1 Qf6+ 43. Qxf6+ Bxf6 44. Ke2 Kg7 45. Kf3 Be5 46. Ke4 Kf6 47. Be8 h4 48. gxh4 Bxh2 49. Kd5 Bg3 50. Ke4 ½-½

Damian Lemos (2482) vs Alejandro Alvarado Diaz (2399)

Event: 1st La Palma GM 2019

A80 Dutch

1.d4 f5 2.Nf3 Nf6 3.g3 g6 4.Bg2 Bg7 5.O-O O-O 6.b3 b6 7.c4 Bb7 8.Nc3 Na6 9.Ba3 Ne4 10.Nxe4 Bxe4 11.Rc1 c5 12.e3 e6 13.Qe2 Qe7 14.Rfd1 d6 15.Ne1 Bxg2 16.Nxg2 Rad8 17.Rd2 e5 18.dxe5 dxe5 19.Rcd1 Nc7 20.Bb2 Ne6 21.Rd5 Nc7 22.R5d2 Ne6 23.Rd5 Nc7 24.R5d2 ½-½

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