3 Champs Highlights

[Lyudmil Tsvetkov]

The 88th game of the 3Champs was very tactical in nature and resulted in a peculiar material imbalance, with 3 pawns of Stockfish against a minor piece of Komodo.

[d]1r3rk1/p2nbpp1/7p/2P1q3/RP6/4P3/P1Q1BPPP/5RK1 b - - 0 26

Here the position at move 26.

Stockfish, white, sees itself half a pawn in advantage, while Komodo thinks it is about equal, but actually both have it wrong. It takes another 20 moves for both engines to understand that black is much better, but this has been the case right at this very juncture.

Usually, 3 pawns would be about equal to a minor piece, but this is a somewhat peculiar material imbalance, as it features opposite-colour bishops. Whenever this is the case, the side with the minor piece might get an additional bonus of at least half a pawn, because the bishops of opposite colours would mean that while the majority of pawns would be of no great use, being easily stopped by the enemy bishop on the squares where the friendly bishop can not support their advance, the surplus minor piece would on the contrary be quite effective in both attacking those pawns, and attacking the enemy king. Thus, the side with the piece more would actually enjoy an almost decisive advantage.

Knowing such a rule could have helped to somehow avoid transposing the game into a constellation that is prejudicial.

Any remarks or disagreements, featuring or not featuring output, very much welcome.

Best, Lyudmil

[Don]

The 88th game of the 3Champs was very tactical in nature and resulted in a peculiar material imbalance, with 3 pawns of Stockfish against a minor piece of Komodo.

[d]1r3rk1/p2nbpp1/7p/2P1q3/RP6/4P3/P1Q1BPPP/5RK1 b - - 0 26

Here the position at move 26.

Stockfish, white, sees itself half a pawn in advantage, while Komodo thinks it is about equal, but actually both have it wrong. It takes another 20 moves for both engines to understand that black is much better, but this has been the case right at this very juncture.

Usually, 3 pawns would be about equal to a minor piece, but this is a somewhat peculiar material imbalance, as it features opposite-colour bishops. Whenever this is the case, the side with the minor piece might get an additional bonus of at least half a pawn, because the bishops of opposite colours would mean that while the majority of pawns would be of no great use, being easily stopped by the enemy bishop on the squares where the friendly bishop can not support their advance, the surplus minor piece would on the contrary be quite effective in both attacking those pawns, and attacking the enemy king. Thus, the side with the piece more would actually enjoy an almost decisive advantage.

Knowing such a rule could have helped to somehow avoid transposing the game into a constellation that is prejudicial.

Any remarks or disagreements, featuring or not featuring output, very much welcome.

Best, Lyudmil

I wish you would include the game itself. The 88th game from the pgn file you can download is a Houdini game.

[Lyudmil Tsvetkov]

The 88th game of the 3Champs was very tactical in nature and resulted in a peculiar material imbalance, with 3 pawns of Stockfish against a minor piece of Komodo.

[d]1r3rk1/p2nbpp1/7p/2P1q3/RP6/4P3/P1Q1BPPP/5RK1 b - - 0 26

Here the position at move 26.

Stockfish, white, sees itself half a pawn in advantage, while Komodo thinks it is about equal, but actually both have it wrong. It takes another 20 moves for both engines to understand that black is much better, but this has been the case right at this very juncture.

Usually, 3 pawns would be about equal to a minor piece, but this is a somewhat peculiar material imbalance, as it features opposite-colour bishops. Whenever this is the case, the side with the minor piece might get an additional bonus of at least half a pawn, because the bishops of opposite colours would mean that while the majority of pawns would be of no great use, being easily stopped by the enemy bishop on the squares where the friendly bishop can not support their advance, the surplus minor piece would on the contrary be quite effective in both attacking those pawns, and attacking the enemy king. Thus, the side with the piece more would actually enjoy an almost decisive advantage.

Knowing such a rule could have helped to somehow avoid transposing the game into a constellation that is prejudicial.

Any remarks or disagreements, featuring or not featuring output, very much welcome.

Best, Lyudmil

I wish you would include the game itself. The 88th game from the pgn file you can download is a Houdini game.

Here is the game, but it is still number 88.

[pgn][PlyCount "148"]
[EventType "tourn"]
[Source "K."]
[Event "3Champs/60+15"]
[Date "2013.08.27"]
[Round "30.1"]
[White "Stockfish 180813 64 SSE4.2 x8"]
[Black "Komodo 1036.03 64-bit x8"]
[Result "0-1"]
[EventDate "2013.08.18"]
[ECO "D55"]
[Annotator "0.52;0.33"]
[MLNrOfMoves "74"]
[MLFlags "000100"]


{Intel(R) Xeon(R) CPU E5-2687W 0 @ 3.10GHz 3099 MHz W=31.4 plies; 11.805kN/s B=24.6 plies; 10.605kN/s}
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Be7 6. e3
{[%eval 52,28] [%emt 0:01:16]} 6... O-O {(h6) [%eval 33,24] [%emt 0:02:50]} 7.
Bd3 {[%eval 56,29] [%emt 0:01:43]} 7... dxc4 {(h6) [%eval 38,24] [%emt 0:02:58]}
8. Bxc4 {[%eval 46,32] [%emt 0:02:14]} 8... h6
{(Nbd7) [%eval 26,24] [%emt 0:00:34]} 9. Bh4 {[%eval 50,29] [%emt 0:01:30]} 9...
b5 {(Nbd7) [%eval 24,25] [%emt 0:00:54]} 10. Be2 {[%eval 36,30] [%emt 0:01:34]}
10... Nbd7 {[%eval 25,25] [%emt 0:00:14]} 11. O-O {[%eval 40,32] [%emt 0:01:49]}
11... b4 {(Bb7) [%eval 19,26] [%emt 0:02:38]} 12. Bxf6
{(Na4) [%eval 60,31] [%emt 0:02:12]} 12... Nxf6 {[%eval 16,23] [%emt 0:00:59]}
13. Na4 {[%eval 52,35] [%emt 0:00:57]} 13... Nd7 {[%eval 24,24] [%emt 0:00:39]}
14. Rc1 {[%eval 38,35] [%emt 0:02:37]} 14... Bb7
{(Qa5) [%eval 27,26] [%emt 0:00:08]} 15. Nd2 {[%eval 50,33] [%emt 0:01:28]}
15... Rc8 {(Qa5) [%eval 21,25] [%emt 0:00:17]} 16. Nb3
{[%eval 50,32] [%emt 0:01:53]} 16... c5 {[%eval 23,26] [%emt 0:00:17]} 17. dxc5
{[%eval 32,33] [%emt 0:02:27]} 17... Bc6 {(Rc7) [%eval 28,26] [%emt 0:05:50]}
18. Nd4 {[%eval 46,32] [%emt 0:01:21]} 18... Be4 {[%eval 29,26] [%emt 0:01:17]}
19. Qb3 {[%eval 46,33] [%emt 0:01:07]} 19... e5 {[%eval 26,27] [%emt 0:00:38]}
20. Nf3 {[%eval 46,36] [%emt 0:00:54]} 20... Qa5 {[%eval 22,28] [%emt 0:00:56]}
21. Rc4 {[%eval 32,37] [%emt 0:04:16]} 21... Bc6 {[%eval 19,31] [%emt 0:01:27]}
22. Rxb4 {[%eval 46,37] [%emt 0:00:00]} 22... Rb8 {[%eval 19,28] [%emt 0:02:14]}
23. Nxe5 {(a3) [%eval 42,37] [%emt 0:02:08]} 23... Bxa4
{[%eval 13,27] [%emt 0:00:55]} 24. Rxa4 {(Qxa4) [%eval 38,36] [%emt 0:05:05]}
24... Qc7 {[%eval 11,24] [%emt 0:01:12]} 25. Qc2
{[%eval 35534,35] [%emt 0:00:38]} 25... Qxe5
{(Nxe5) [%eval 12,26] [%emt 0:02:38]} 26. b4 {[%eval 48,33] [%emt 0:01:59]}
26... Rfd8 {[%eval 12,26] [%emt 0:00:13]} 27. g3
{(a3) [%eval 46,32] [%emt 0:01:09]} 27... Qc7 {[%eval 16,26] [%emt 0:03:45]} 28.
a3 {[%eval 54,33] [%emt 0:00:00]} 28... Rbc8
{(Ne5) [%eval 12,26] [%emt 0:02:28]} 29. Rd1 {[%eval 64,29] [%emt 0:01:34]}
29... g6 {(Ne5) [%eval 28,26] [%emt 0:08:28]} 30. Ra6
{[%eval 60,31] [%emt 0:01:38]} 30... Kg7 {[%eval 29,24] [%emt 0:00:46]} 31. Bc4
{[%eval 58,32] [%emt 0:00:47]} 31... Qb7 {[%eval 31,25] [%emt 0:00:27]} 32. e4
{(Rd4) [%eval 48,33] [%emt 0:00:52]} 32... Nb8
{(Ne5) [%eval 15,22] [%emt 0:01:08]} 33. Ra5 {[%eval 38,31] [%emt 0:02:16]}
33... Nc6 {(Rxd1+) [%eval 24,23] [%emt 0:00:24]} 34. Ba6
{[%eval 46,34] [%emt 0:01:09]} 34... Qc7 {[%eval 24,26] [%emt 0:01:14]} 35. Bxc8
{[%eval 46,34] [%emt 0:00:55]} 35... Nxa5 {[%eval 20,26] [%emt 0:00:02]} 36. Ba6
{[%eval 46,34] [%emt 0:02:01]} 36... Nc6 {(Rxd1+) [%eval 28,27] [%emt 0:01:35]}
37. Rd5 {[%eval 46,32] [%emt 0:01:06]} 37... g5
{(Bf6) [%eval 26,24] [%emt 0:00:07]} 38. Qd3
{(Kg2) [%eval 42,32] [%emt 0:06:14]} 38... Bf6 {[%eval 15,23] [%emt 0:00:53]}
39. Kg2 {[%eval 42,34] [%emt 0:00:27]} 39... Qe7 {[%eval 28,22] [%emt 0:00:31]}
40. h3 {[%eval 36,35] [%emt 0:01:57]} 40... h5
{(Ne5) [%eval 10,25] [%emt 0:01:02]} 41. Qe3
{(Bb5) [%eval 10,29] [%emt 0:00:44]} 41... Ne5
{(Nd4) [%eval 10,26] [%emt 0:00:58]} 42. Qd2 {(Be2) [%eval 8,30] [%emt 0:01:11]}
42... Rg8 {(Nc6) [%eval 10,24] [%emt 0:00:26]} 43. Bf1
{(Be2) [%eval 0,28] [%emt 0:00:49]} 43... Ng6
{(Re8) [%eval -1,25] [%emt 0:01:34]} 44. Qd3 {[%eval 0,30] [%emt 0:00:37]} 44...
Qe8 {[%eval -13,25] [%emt 0:00:54]} 45. Rd6 {[%eval 0,31] [%emt 0:00:00]} 45...
h4 {[%eval -23,25] [%emt 0:00:32]} 46. Qd5 {[%eval 0,32] [%emt 0:00:18]} 46...
hxg3 {(g4) [%eval -20,25] [%emt 0:00:45]} 47. fxg3 {[%eval 0,31] [%emt 0:00:19]}
47... Ne5 {[%eval -23,26] [%emt 0:01:03]} 48. Ra6
{(Ba6) [%eval 35534,34] [%emt 0:02:35]} 48... Rh8
{[%eval -57,24] [%emt 0:00:37]} 49. Qd6 {[%eval -48,32] [%emt 0:00:02]} 49...
Rh6 {[%eval -56,24] [%emt 0:00:24]} 50. Qd5 {[%eval -42,32] [%emt 0:00:09]}
50... Qc8 {[%eval -61,25] [%emt 0:01:04]} 51. Kf2
{[%eval -46,32] [%emt 0:00:01]} 51... Qb8 {[%eval -53,24] [%emt 0:01:12]} 52.
Bg2 {(Kg2) [%eval -54,31] [%emt 0:00:00]} 52... Qc7
{[%eval -56,23] [%emt 0:00:37]} 53. Rd6 {[%eval -76,31] [%emt 0:00:21]} 53...
Rh5 {[%eval -61,23] [%emt 0:00:11]} 54. Qd1 {[%eval -82,31] [%emt 0:02:04]}
54... g4 {[%eval -69,23] [%emt 0:00:16]} 55. hxg4
{(h4) [%eval -84,31] [%emt 0:00:26]} 55... Rh6
{(Rh8) [%eval -72,19] [%emt 0:00:12]} 56. Kg1
{(Rd5) [%eval -125,26] [%emt 0:00:40]} 56... Qc8
{[%eval -106,22] [%emt 0:00:22]} 57. Qe2 {[%eval -177,29] [%emt 0:00:30]} 57...
Rg6 {[%eval -116,24] [%emt 0:00:14]} 58. g5
{(Bf3) [%eval -218,30] [%emt 0:00:58]} 58... Bxg5
{(Rxg5) [%eval -166,19] [%emt 0:00:12]} 59. Rxg6+
{[%eval -185,28] [%emt 0:00:24]} 59... fxg6
{(Kxg6) [%eval -178,22] [%emt 0:00:00]} 60. Bf1 {[%eval -274,29] [%emt 0:00:47]}
60... Qe6 {[%eval -244,25] [%emt 0:00:24]} 61. Qb2
{[%eval -307,30] [%emt 0:00:21]} 61... Bf6 {[%eval -251,26] [%emt 0:00:10]} 62.
Qc2 {[%eval -319,31] [%emt 0:00:09]} 62... Qg4 {[%eval -284,26] [%emt 0:00:53]}
63. Qf2 {[%eval -321,34] [%emt 0:00:00]} 63... Nf3+
{(Qxe4) [%eval -280,23] [%emt 0:00:12]} 64. Kg2 {[%eval -282,27] [%emt 0:00:20]}
64... Ng5 {[%eval -285,25] [%emt 0:00:04]} 65. Qe3
{[%eval -315,30] [%emt 0:00:18]} 65... Be5 {[%eval -304,25] [%emt 0:00:26]} 66.
Qd3 {[%eval 35534,31] [%emt 0:00:31]} 66... Qh3+
{[%eval -321,24] [%emt 0:00:08]} 67. Kf2 {[%eval 35534,29] [%emt 0:00:40]} 67...
Qh2+ {(Bxg3+) [%eval -322,25] [%emt 0:00:01]} 68. Ke1
{[%eval -404,24] [%emt 0:00:18]} 68... Ne6 {[%eval -321,25] [%emt 0:00:14]} 69.
Qd7+ {[%eval -450,25] [%emt 0:00:11]} 69... Kf6 {[%eval -323,24] [%emt 0:00:11]}
70. Qd3 {(Qd2) [%eval 35534,28] [%emt 0:00:21]} 70... Nd4
{[%eval -371,22] [%emt 0:00:17]} 71. Kd1 {[%eval -622,25] [%emt 0:00:03]} 71...
Qf2 {[%eval -486,22] [%emt 0:00:33]} 72. c6 {[%eval 35534,30] [%emt 0:00:04]}
72... Bxg3 {[%eval -605,25] [%emt 0:00:59]} 73. Kc1
{[%eval 35534,30] [%emt 0:00:00]} 73... Be5 {[%eval -660,23] [%emt 0:00:12]} 74.
Kb1 {[%eval -1020,30] [%emt 0:00:36]} 74... Kg7
{(Nxc6) [%eval -729,25] [%emt 0:00:11]} 0-1
[/pgn]

[carldaman]

[d]1k1r2r1/1pp2q2/p1nb1p2/2p1p2p/P3P1pP/2PPN1B1/1P2QPP1/RR4K1 w - - 0 26

Now Stockfish plays 26. Rbf1. What kind of move is this? The rook goes from a line where it attacks the enemy king to a line where it does nothing. Stockfish then proceeds to move its other rook from the queen to the king side, and then moves back both rooks to the queen side. At the same time Komodo manages to move couple of times its rook from d8 to d7 and back. And this is in a position with opposite side castling where every single tempo counts.

I will not go into any specific variations further, my objections are just principled ones, I know the engines calculate very well, but there are things they simply do not see.

Lyudmil, I only had time to look at the last diagram. This was rather time-consuming as you can imagine, but fun I came up with some alternate approaches to White's 26th move. 26. Nc2 was my idea, to aim for b2-b4, not liked by engines, but natural play by Black with 26...f5 allows White to develop some strong pressure on the b-file. Better is 26...Be7 to double on d-file and press against White's d-pawn.

Black is not without resources and is helped by the locked-in White Bishop's inactivity. Fritz 10 suggested 26.Qd2!?, also to support the b4 push, but the latest Stockfish found 29...a5!, a great defensive concept, sacrificing a pawn for big compensation. This made the Qd2 idea less attractive. Then I also considered 26.Qc2 to try for a slower build-up, but with mixed results -- Black can go wrong, but can also defend with better play.

In the actual 3-champs (chumps?) game, SF took the safe route with 26.Rbf1, which is just chicken chess ("don't take any chances, play the most passive move, ratings mean everything")

[pgn]
[Date "2013.08.31"]
[Round "?"]
[White "3champs"]
[Black "analysis"]
[Result "*"]
[SetUp "1"]
[FEN "1k1r2r1/1pp2q2/p1nb1p2/2p1p2p/P3P1pP/2PPN1B1/1P2QPP1/RR4K1 w - - 0 26"]
[PlyCount "97"]
[EventDate "2013.??.??"]

26. Nc2 $5 (26. Nd5 $2 f5 $17) (26. Qd2 $5 {DF10} Rd7 27. b4 cxb4 28. cxb4 Nd4
29. b5 a5 $1 {SF} (29... Nb3 30. Qc3 $1 Nxa1 31. bxa6 $18) 30. b6 $5 (30. Qxa5
$6 Bc5 31. b6 (31. Nd5 Rxd5 $1 32. exd5 Rd8 $1 (32... Qxd5 $2 33. b6 $1 cxb6 $8
34. Rxb6 $16) 33. b6 $5 Bxb6 34. Qd2 Qxd5 35. a5 Bc5 36. a6 (36. Ra2 f5 37.
Rab2 f4 38. Bxf4 exf4 39. Qxf4 Kc8 40. Kh1 Rf8 $17) 36... b6 $17) 31... cxb6
32. Rxb6 (32. Qe1 Nb3 33. Ra2 Rxd3 34. Kh2 Bxe3 35. fxe3 Rgd8 36. Rf2 Qe6 $17)
32... Bxb6 33. Qxb6 Rgd8 34. Nd5 Rd6 35. Qb2 Rxd5 $1 36. exd5 Qxd5 37. Rb1 Rd7
38. Qb6 Qc6 39. Qb4 Qd6 $17) 30... cxb6 (30... Nb3 31. Rxb3 Qxb3 32. Nd5 Rf8
33. Qxa5 c6 34. Nxf6 $1 Rxf6 35. Bxe5 Bxe5 36. Qxe5+ Rfd6 $8 37. Qa5 Rf7 38.
Qa7+ Kc8 39. Qa8+ Kd7 40. Qxb7+ Ke6 41. Qc8+ Ke7 $8 42. b7 Rf8 43. a5 Qb2 44.
Rf1 $8 g3 45. a6 gxf2+ 46. Kh1 Qb6 47. a7 Qxa7 48. Qc7+ Rd7 49. Qe5+ Kf7 50.
Qf5+ Ke8 51. Qe5+ $8 Kf7 $8 52. Qf5+ Ke7 53. Qe5+ Kf7 $11) (30... Bb4 $5 31.
bxc7+ Rxc7 (31... Kxc7 32. Rxb4 axb4 33. Qxb4 Kb8 34. Rb1 $44) 32. Qa2 (32.
Rxb4 $6 axb4 33. Qxb4 Rd8 34. Qb6 Ne2+ 35. Kh2 Nc3 36. a5 Rxd3 37. a6 Rc6 38.
Qb4 b6 39. a7+ Ka8 $19) 32... Rd8 33. Qxf7 Rxf7 34. Kf1 Rfd7 35. Ra2 $15) 31.
Nd5 Bc5 32. Nxb6 Rd6 33. Nd5 $8 Rxd5 $5 34. exd5 Qxd5 35. Qxa5 Nb3 36. Qb5 Nxa1
37. d4 $1 Nc2 38. dxc5 Na3 39. Qb3 Qxb3 40. Rxb3 Nc4 $15) (26. Qc2 $5 Rd7 27.
b3 Rgd8 28. Rb2 Bf8 29. Rd1 Bh6 30. Nf5 Bf8 $142 $13 (30... Bf4 $6 31. b4 (31.
Bxf4 exf4 32. b4) 31... cxb4 32. cxb4 Bxg3 33. b5 $1 Bxf2+ 34. Kxf2 axb5 35.
axb5 $14 (35. Rxb5 $5 Ka8 $13) 35... Na5 36. b6 $36 (36. Ra1 $5 b6 37. Ra3 $14
Qf8 38. Rba2 Qf7 39. Kg1 Qe6 40. Ra1 Kb7) 36... Qe6 37. bxc7+ Rxc7 38. Qa4 Rc5
39. Qb4 Qc6 40. Kg3 (40. Ne7 Rc2+) 40... Qc7 41. Kh2 Nc4 42. Rc2 Rc6 43. Ra2
Qb6 44. Qe7 Qc7 45. Rda1 Qxe7 46. Nxe7 Rxd3 $5 47. Nxc6+ bxc6 48. Ra8+ Kc7 49.
Rf8 Rd6 50. Rh8 Nd2 51. Rh7+ Kb6 52. Re1 Rd4 53. Rxh5 Nxe4 54. Rh8 $16) 31. Ne3
Qe6 $5 32. Qb1 $5 Bh6 (32... Ne7 $2 33. b4 $1) 33. Nf5 $13) 26... f5 $5 (26...
Be7 $142 $1 $13 27. b4 (27. Qd2 $2 Na5 $1 28. b4 Nb3 $19) (27. f3 $2 gxf3 28.
Qxf3 Qg7 $19) (27. b3 $5 Rd7 28. Ne3 Rgd8 29. Rd1 Qxb3 30. Nd5 Rxd5 31. exd5
Qxd5 $15) 27... cxb4 28. cxb4 Nd4 29. Qd1 Nxc2 30. Qxc2 Rd4 31. Qc3 (31. b5 a5
$17) 31... b6 $1 $17) 27. exf5 Qxf5 28. b4 cxb4 29. cxb4 Nd4 30. Nxd4 exd4 31.
Bxd6 Rxd6 32. b5 Re6 (32... g3 $5 33. bxa6 gxf2+ (33... Rxa6 34. f3) 34. Qxf2
Qxf2+ (34... Rxg2+ $5 35. Qxg2 Rg6 36. Rxb7+ Kc8 37. Rb5 $5 Rxg2+ 38. Kxg2 Qg6+
39. Rg5 Qxa6 (39... Qxd3 40. Rg8+) 40. Rg8+ Kb7 41. Rb1+ Ka7 42. Rg5 $11) 35.
Kxf2 Rxa6 36. Rb5 Rag6 37. Rxh5 Rxg2+ 38. Kf3 $13 R8g4 $5 39. Rc1 R2g3+ 40. Kf2
Rxd3 41. Rh8+ Ka7 42. Rxc7 Rgg3 43. Rc5 Rdf3+ 44. Ke1 Rg1+ 45. Ke2 $11) (32...
a5 33. Re1 $13) 33. Qb2 g3 $5 (33... Qxd3 34. bxa6 Qxa6 35. Qxd4 Re2 36. Rb3 $1
(36. Ra2 $6 Rxa2 37. Qd5 Rf8 38. Qxa2 Qc6 39. a5 Rf5 40. a6 b6 41. a7+ Ka8 42.
Re1 Ra5 43. Qd2 Kxa7 44. Qf4 Kb7 45. Re7 Rc5 $17) 36... Rf8 37. Rf1 Qc6 $11 38.
a5 Re4 39. Qa1 Re2 (39... Ref4 40. Qb2 $11) 40. Qd4 (40. a6 $143 b6 41. Rc3 Qd6
42. Rcc1 Qd7 43. Qa3 Rf5 44. Qg3 Rfe5 45. Qc3 Rc5 46. a7+ $5 Ka8 47. Qh8+ Re8
48. Qb2 Ree5 49. Rxc5 Rxc5 50. Ra1 Rd5 $15) 40... Re4 $11) 34. fxg3 (34. bxa6
gxf2+) 34... Qxd3 (34... Rxg3 35. bxa6 b6 36. a5 Reg6 37. axb6 cxb6 (37...
Rxg2+ 38. Qxg2 Rxg2+ 39. Kxg2 $11) 38. Ra2 $11 Rxg2+ 39. Qxg2 Ka7 (39... Rxg2+
40. Rxg2 $11) 40. Rb3 b5 41. Qxg6 Qxg6+ 42. Rg2 Qe8 43. Rgb2 Kxa6 44. Kg2 $11)
35. Ra3 Qe4 $6 (35... Qc4 $1 36. bxa6 Rb6 37. Rb3 Rgg6 38. axb7 d3 39. Rxb6
Rxb6 40. Qh8+ Kxb7 41. Rd1 Qd5 42. a5 Rb3 $11 43. Qf8 c5 44. a6+ Ka7 45. Kh2 c4
46. Rf1 d2 47. Rf7+ Kxa6 48. Qc8+ Ka5 $11) 36. bxa6 $1 (36. a5 $5 axb5 $1 (
36... Kc8 $2 37. bxa6 Rxa6 38. Rb3 Rc6 39. Qf2 Rc2 40. Qf1 Rg6 41. Rf3 Re6 42.
Rf8+ Kd7 43. Kh2 Qe2 44. Qf7+ Kc6 45. Rg1 d3 {Rybka 3 Human 1-cpu x64:} 46. Rd8
Rd6 47. Rc8 Rd7 48. Qb3 Rd5 (48... Rd4 49. Qb6+ Kd7 50. Rxc7+ Rxc7 51. Qxd4+
Kc8 52. Qh8+ Kd7 53. Qg7+ Qe7 {[%eval 117,14]}) 49. Qa4+ Rb5 50. a6 $1 $18 bxa6
51. Qxa6+ Rb6 52. Qa8+ Kd6 (52... Rb7 53. Rb8) 53. Rd8+ Kc5 54. Qd5+ Kb4 55.
Rf8 $18) (36... Ka8 $6 37. bxa6 Rxa6 $8 38. Rb3 Rb8 39. Rb4 $5 Rd6 40. Kh2 $1
Qd5 41. Rb5 Qc6 (41... c5 42. Rb6 Rxb6 43. axb6 $18) 42. Rc1 $36 Qd7 43. Rbc5
Rc8 44. Rb1 Rb8 45. Rxh5 d3 46. Rb5 (46. Qd2 Rd5 47. Rxd5 Qxd5 $11) 46... Qc6
47. Rc1 (47. a6 b6 $13 48. Rb3 d2 49. Rd1 Rbd8 50. Rc3 Qd7 51. Qc2 c5 52. Qe4+
Ka7 53. Rc2 Qg7 54. Qf4 Rd4 55. Qf2 Qd7 $17) 47... Qd7 48. Rd1 d2 49. Rc5 Re8
50. Rc2 Re2 51. a6 b6 (51... bxa6 $6 52. Qb3 Qb5 53. Qg8+ Kb7 54. Qf7 $16) 52.
Qb3 $1 Rd3 53. Rxc7 $1 Qd5 $8 54. Qxd5+ Rxd5 55. Rc2 $14) 37. Qxb5 Rd8 (37...
Re5 38. Qb2) 38. Kh2 d3 (38... Qd5 $5 39. Qb2 Rd7 40. Rf3 Kc8 41. Rf8+ Rd8 42.
Rxd8+ Kxd8 $8 43. Qf2 d3 44. Qf7 Re5 (44... d2 $2 45. a6 $1 $16) 45. Qf6+ (45.
a6 $5 Qxf7 46. axb7 Kd7 $5 47. b8=Q d2 48. Qb2 Rd5 49. Rd1 Qf2 50. Qg7+ Kd6 51.
Qg6+ Kc5 52. Qc2+ Kd6 $11) 45... Kd7 46. Rxb7 d2 47. Rb8 Re7 48. Qf8 d1=Q 49.
Rd8+ Ke6 50. Qh6+ Ke5 $11 (50... Kf5 51. Qg5+) 51. Qg5+ Ke6 52. Qg6+) 39. a6 b6
(39... Rb6 40. Qg5) 40. Rd1 d2 41. Qxh5 (41. Ra2 Red6 42. Qxh5 Ka7 43. Qf7 R8d7
$17) 41... Qe2 42. Qf7 $1 (42. a7+ Ka8 $17) (42. Qxe2 Rxe2 43. Ra2 c5 $17)
42... Qxd1 43. Qxe6 Qc2 44. Rc3 $3 Qa4 $8 (44... Qxc3 45. Qe4 $1 $11 Kc8 46.
Qe6+ Kb8 47. Qe4) 45. Qf7 Qd7 $8 46. Qf3 c6 $8 47. Rxc6 d1=Q 48. Rxb6+ Ka7 49.
Rb7+ Kxa6 50. Rxd7 Qxd7 51. g4 $17) 36... Rxa6 $6 (36... Rb6 $142 $5 37. Rb3
Rxg3 38. Rxb6 cxb6 39. Rf1 Qe3+ 40. Rf2 Rg6 41. axb7 $13 Rf6 42. Qe2 Rxf2 43.
Qxf2 Qe5 (43... Qc1+ 44. Qf1 Qxf1+ 45. Kxf1 Kxb7 $11) 44. Kf1 $13) 37. Rb3 b6
38. a5 $1 Rg6 39. axb6 Raxb6 40. Kh2 Qd5 41. Qa3 Rxb3 42. Rxb3+ Rb6 $8 43. Rf3
Kb7 44. Rf2 Rb3 45. Qa2 $5 Rb5 46. Qa4 d3 47. Ra2 Kc8 48. Qa6+ Kd7 49. Rd2 Qf5
50. Qa4 $1 Kc8 51. Qc4 Rd5 52. Ra2 Kd7 53. Rf2 $3 Qe6 54. Rf8 c6 55. Qb3 Qe7
56. Qb7+ Kd6 57. Qb8+ Kc5 58. Qa8 Qd6 59. Qa7+ Kc4 60. Qa4+ Kc3 61. Qa1+ Kb3
62. Qb1+ Kc4 63. Qc1+ Kb3 64. Rf2 Qa3 65. Qxc6 Qc5 66. Qb7+ Qb5 67. Qf7 Qc5 68.
Qf3 Kc4 69. Rb2 $1 $18 Qd6 (69... d2 70. Qb3+ Kd4 71. Rxd2+) 70. Qf1 Kd4 71.
Qg1+ Ke4 72. Qe1+ Kd4 73. Rb4+ Kc5 74. Qc3# *

[/pgn]

What's the best move for Black?

[d]1k4r1/1ppr1q2/p2b1p2/1P2p2p/P2nP1pP/3PN1B1/3Q1PP1/RR4K1 b - - 0 29

And again, how can Black get out of this?

[d]1k4r1/1pp5/p3r3/1P5p/P2p3P/R2q2P1/1Q4P1/1R4K1 b - - 0 35

CL

[jdart]

What about g4, is not that winning instantly? (Again g4, obviously the main chess rule should be play g4 to win)

.

I don't think g4 works here. After .. hxg4 Rxg4 f5, White does not seem to have a followup.

--Jon

[Lyudmil Tsvetkov]

What about g4, is not that winning instantly? (Again g4, obviously the main chess rule should be play g4 to win)

.

I don't think g4 works here. After .. hxg4 Rxg4 f5, White does not seem to have a followup.

--Jon

Hi Jon.

Sorry, after some break I just read the forum.

But, of course, on ...hg4, f5 for white will follow immediately.
I analysed the position for quite some time and found a single possible defense for black in a multitude of variations, possibly even it does not hold.

Most of the lines are very quick white walkovers.

Of course, on hg4, f5 follows immediately (And Qf4 after that). Maybe this is what engines do not see, a series of pawn sacrifices.

[Carlos Ylich]

Congratulations Lyudmil,
Your work is appreciated by many. Keep with it.

[Dr.Wael Deeb]

Congratulations Lyudmil,
Your work is appreciated by many. Keep with it.

I second that.....

A good stuff to read indeed....
Dr.D

[Lyudmil Tsvetkov]

Congratulations Lyudmil,
Your work is appreciated by many. Keep with it.

I second that.....

A good stuff to read indeed....
Dr.D

Many thanks, Carlos, many thanks dr. Deeb!
Last time there was 1 person reading my posts, now there are already 2, big progress indeed

I think the main thing is that you patiently wait until a sufficiently strong engine appears (for example Stockfish in a year's time, going by the current pace), and then start consistently defeating it, this could already be something.

But you have to be patient, you know....