A bust in mainline Slav

[NATIONAL12]

After 14...h4 15.Be5 Qe7 16.h3 it appears there is a better move than 16...a6 which is to slow. 16...g4 recommended by Kappatoo on Rybka forum.

[Harvey Williamson]

After 14...h4 15.Be5 Qe7 16.h3 it appears there is a better move than 16...a6 which is to slow. 16...g4 recommended by Kappatoo on Rybka forum.

g4 has been tried:

[Event "WC32/ct02"]
[Site "ICCF"]
[Date "2012.09.20"]
[Round "?"]
[White "Wunderlich, Dr. Hans-Dieter"]
[Black "Simakhin, Aleksey Konstantino"]
[Result "1/2-1/2"]
[WhiteElo "2648"]
[BlackElo "2521"]
[PlyCount "61"]
[EventDate "2012.??.??"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bh4 dxc4 7. e4 g5 8. Bg3 b5
9. Be2 Bb7 10. O-O Nbd7 11. Ne5 h5 12. Nxd7 Qxd7 13. Qc1 Rg8 14. Rd1 h4 15. Be5
Qe7 16. h3 g4 17. Bxf6 Qxf6 18. e5 Qh6 19. Ne4 O-O-O 20. Qxh6 Bxh6 21. hxg4 Bf8
22. b3 Ba3 23. bxc4 bxc4 24. Rab1 Ba6 25. g5 Rh8 26. f4 Kc7 27. Kf2 Bb5 28. Nc3
Ba6 29. Ne4 Bb5 30. Nc3 Ba6 31. Ne4 1/2-1/2

[Sedat Canbaz]

I would like to say my opponent Ruben spent 8 days looking at this position armed with at least one 12 core looking at this position and then resigned,see game link to a team game in this position,posted.

Hello Paul,

Is this a human game or computer game ?

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 h6 6.Bh4 dxc4 7.e4 g5 8.Bg3 b5 9.Be2 Bb7 10.0-0 Nbd7 11.Ne5 h5 12.Nxd7 Qxd7 13.Qc1 Rg8 14.Rd1 h4 15.Be5 Qe7 16.h3 a6 17.b3 Nd7 18.Bh2 b4 19.Na4 c3 20.a3 a5 21.Qc2 and now line is busted with either 21...Rc8 or 21...Qf8 as defective.

Best,
Sedat

[NATIONAL12]

Centaur game.IE no engine gives 22.Bg4 as best move.
They all want to play Nc5.

[zullil]

After 14...h4 15.Be5 Qe7 16.h3 it appears there is a better move than 16...a6 which is to slow. 16...g4 recommended by Kappatoo on Rybka forum.

g4 has been tried:

[Event "WC32/ct02"]
[Site "ICCF"]
[Date "2012.09.20"]
[Round "?"]
[White "Wunderlich, Dr. Hans-Dieter"]
[Black "Simakhin, Aleksey Konstantino"]
[Result "1/2-1/2"]
[WhiteElo "2648"]
[BlackElo "2521"]
[PlyCount "61"]
[EventDate "2012.??.??"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bh4 dxc4 7. e4 g5 8. Bg3 b5
9. Be2 Bb7 10. O-O Nbd7 11. Ne5 h5 12. Nxd7 Qxd7 13. Qc1 Rg8 14. Rd1 h4 15. Be5
Qe7 16. h3 g4 17. Bxf6 Qxf6 18. e5 Qh6 19. Ne4 O-O-O 20. Qxh6 Bxh6 21. hxg4 Bf8
22. b3 Ba3 23. bxc4 bxc4 24. Rab1 Ba6 25. g5 Rh8 26. f4 Kc7 27. Kf2 Bb5 28. Nc3
Ba6 29. Ne4 Bb5 30. Nc3 Ba6 31. Ne4 1/2-1/2

Stockfish with MultiPV=3:

Code: Select all

info depth 46 seldepth 68 score cp 0 nodes 428908734059 nps 19813293 time 21647523 multipv 1 pv a7a6 b2b3 b5b4 c3a4 c4c3 a2a3 g5g4 e5f6 e7f6 e2g4 a6a5 a3b4 a5b4 e4e5 f6g5 c1b1 g5f4 a4c3 a8a1 b1a1 b4c3 a1a7 c3c2 a7b8 e8d7 b8b7 d7d8 b7b6 d8d7 b6a7 d7e8 a7a8 e8d7

info depth 46 seldepth 68 score cp 0 nodes 428908734059 nps 19813293 time 21647523 multipv 2 pv a8d8 c1d2 g8g6 d2e3 f6d7 e5c7 d8c8 c7h2 d7f6 h2e5 f6d7 e5h2

info depth 46 seldepth 68 score cp 0 nodes 428908734059 nps 19813293 time 21647523 multipv 3 pv g5g4 e5f6 e7f6 e2g4 e8c8 e4e5 f6h6 c1c2 f8e7 b2b3 c6c5 d4d5 g8g4 h3g4 h4h3 b3c4 h3g2 g1g2 b5b4 c3e4 h6f4 f2f3 f4e5 d5e6 d8h8 d1h1 f7f5 h1h8 e5h8 a1h1 h8g7 c2a4 f5e4 a4d7 c8b8 d7e8 b8c7 e8d7 c7b8

[zullil]

Centaur game.IE no engine gives 22.Bg4 as best move.
They all want to play Nc5.

Latest Stockfish certainly finds it:

Code: Select all

info depth 43 seldepth 67 score cp 82 upperbound nodes 11475179856 nps 17781768 time 645334 multipv 1 pv a4c5 f8c5 d4c5 d7e5 a3b4 g5g4 h2e5 f6e5 e2g4 a5b4 c2d3 e5c7 a1a8 b7a8 e4e5 g8f8 d3e4
info depth 43 currmove a4c5 currmovenumber 1
info depth 43 currmove a3b4 currmovenumber 2
info depth 43 seldepth 67 score cp 107 lowerbound nodes 29952200916 nps 18872711 time 1587064 multipv 1 pv e2g4 b4a3 a4c5 f8c5 d4c5 d7e5 a1a3 e5g4 h3g4 g8h8 d1d3 b7a6 a3a5 a8a7 c2c3 f6c3 d3c3 f7f6
info depth 43 currmove e2g4 currmovenumber 1

[NATIONAL12]

I meant 21...Qf6(typo) but I think most of you realised this.

[zullil]

Code: Select all

info depth 45 seldepth 79 score cp 150 nodes 217760006737 nps 20006069 time 10884697 multipv 1 pv e2g4 g8g7 d4d5 c6d5 e4d5 a8c8 d5e6 f7e6 a1c1 g7f7 c2e2 e6e5 d1d7 f7d7 h2e5 f6c6 g4d7 e8d7 e2g4 d7e7 a3b4 a5b4 a4c3 c6g2 g4g2 b7g2 g1g2 b4c3 e5c3 c8b8 b3b4 e7d7 c1b1 b8b5 g2f3 b5f5 f3e2 f5b5 b1a1 b5b8 c3d2 f8e7 e2d3 b8f8 a1a7 d7e6 a7a6 e6d5 a6a5 d5e6

[Stephen Ham]

Hi Paul,

On a pedantic note, this was not a mainline Slav. In fact it was not even a Slav Defense at all.

Instead, this is a mainline Semi-Slav Defense. Specifically it's the ever-popular Anti-Moscow Gambit variation.

I noticed your opponents also incorrectly calling this a Slav Defense. That said, it's surprising that this thread has run this long without any prior correction.

Finally - best wishes to both of Bristol's football teams.

All the best,
Steve

[Sedat Canbaz]

Centaur game.IE no engine gives 22.Bg4 as best move.
They all want to play Nc5.

Hello Paul,

Congrats...

But however,
I think you was lucky that the opponent preferred to play to 6.Bh4


And not 8 days, even 888 days..., Whites has no BIG chances to win, due to:
6th move:Bh4 is not recommended,critical,weak...(according to my experience)
6th move: Bxf6 is much better choice !

That's why,
Bh4 is not allowed for playing in Perfect 2014 book

Actually several years ago (according to best human players)
I was considering that Bh4 is a good choice, but nowadays I have different view...
I mean the current top chess programs do not perform very good by playing at 6.Bh4...


And here are some useful comparings by different opening books
Where as we see Bh4 engines's winning percentage is less than 50 %...

.