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Old 2017-04-13, 02:25   #1
MooMoo2
 
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Default Engine-assisted game vs Stockfish, move 34 discussion

The most popular move on the move 33 poll was ...Bg7. Stockfish played 34. Bc4, and the FEN is:
5r1k/6bp/3Q4/1q3p2/2B1pP2/1P6/3r2PP/2R2R1K b - - 2 34

Game so far: 1.e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Na3 b5 10. Bxf6 gxf6 11. Nd5 f5 12. c3 Bg7 13. Bd3 Be6 14. Nc2 O-O 15. O-O fxe4 16. Bxe4 Rc8 17. a4 f5 18. axb5 axb5 19. Bf3 e4 20. Be2 Kh8 21. Qd2 Be5 22. f4 Bxd5 23. Qxd5 Qb6+ 24. Kh1 Bg7 25. Rad1 b4 26. Nxb4 Nxb4 27. cxb4 Qxb4 28. b3 Rc2 29. Bc4 Qc5 30. Qe6 Bd4 31. Rc1 Rd2 32. Bd5 Qb5 33. Qxd6 Bg7 34. Bc4

Depth: 61 ply. Nodes searched: 2,360,445,914,151 (~2360 G)
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Old 2017-04-13, 03:21   #2
richs
 
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All of dh1's runs (except Komodo) in the prior move's thread show Rxd6, exchanging Queens.
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Old 2017-04-13, 13:15   #3
WMHalsdorf
 
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The only other move worth considering is Qa5.
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Old 2017-04-15, 09:24   #4
dh1
 
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FEN is: 5r1k/6bp/3Q4/1q3p2/2B1pP2/1P6/3r2PP/2R2R1K b - - 2 34

(more-negative is worse for black)
Code:
Komodo-10.4-64bit:
 30    -3.95    34. ... Qxc4 35.Qxf8+ Bxf8 36.bxc4 Bc5 37.Rfd1 Rf2 38.Rd5 Bb4 39.c5 e3 40.Kg1 Ba3 41.Ra1 Rc2 42.h3 e2 43.Kf2 Bxc5+ 44.Kf3 Be7 45.Rd7 Ra2 46.Re1 Ra3+ 47.Kxe2 Bf8 48.Rf7 Kg8 49.Rxf5 Be7 50.Rd1 Kg7 51.Re5 Bf6 52.Re6 Kg6 53.Rd5 Kf7 54.Rb6 Ke7 55.f5
 30    -0.60    34. ... Qd7 35.Qxd7 Rxd7 36.Rfd1 Bd4 37.Be6 Re7 38.Rxd4 Rxe6 39.Rd7 h6 40.Rb7 Rd6 41.b4 Rd2 42.b5 Rb2 43.b6 Re8 44.Kg1 e3 45.g3 Kg8 46.Re1 Kf8 47.h3 Kg8 48.Kf1 Re6 49.Re2 Rbxb6 50.Rxb6 Rxb6 51.Rxe3
 30     0.00    34. ... Rxd6 35.Bxb5 Rd2 36.Rfe1 Bd4 37.Re2 Rxe2 38.Bxe2 Ra8 39.Bc4 Ra2 40.g3 Kg7 41.Rd1 Bc3 42.Rd7+ Kg6 43.b4 Ra1+ 44.Kg2 Bxb4 45.Rb7 Rb1 46.Rb6+ Kg7 47.Rb7+ Kg6
 30     0.00    34. ... Qa5 35.Ra1 Qd8 36.Qxd8 Rfxd8 37.Ra6 Bc3 38.Re6 Ra8 39.h3 Raa2 40.Rc1 Bb4 41.Re5 Bd6 42.Rxf5 Rxg2 43.Rd1 Rh2+ 44.Kg1 Rag2+ 45.Kf1 Rf2+ 46.Kg1 Rhg2+ 47.Kh1 Rh2+ 48.Kg1
...
 50    -0.15    34. ... Qa5 35.Qe7 Qd8 36.Qb4 Qd4 37.Rce1 Qb2 38.Rg1 Qd4 39.Qe7 Qf2 40.Ref1 Qb6 41.Rd1 Qd8 42.Qxd8 Rfxd8 43.Rxd2 Rxd2 44.g3 Bc3 45.Rc1 Bb4 46.Re1 Rxh2+ 47.Kxh2 Bxe1 48.Be6 e3 49.Bc4 Kg7 50.Kg2 Kf6 51.Kf3 Kg6 52.Be2 Kf6 53.Ba6 Kf7 54.Kg2 Kf6 55.Bd3 Ke6 56.Kf3 Kf6 57.Be2 Ke6 58.Bc4+ Kf6 59.Kxe3 Bxg3 60.b4 Bh2 61.b5 Bg1+ 62.Kf3 h5
 50     0.00    34. ... Rxd6 35.Bxb5 Rd2 36.g3 Rb8 37.Bc4 Rbd8 38.Be6 Bb2 39.Rb1 e3 40.Bc4 Bd4 41.Rfe1 Rc8 42.Rbd1 Bc3 43.Rc1 Bd4 44.Rcd1

========================================
Houdini 5:
 47/107    -8.54    34. ... Qxc4 35.Qxf8+ Bxf8 36.bxc4 Rd6 37.Rfd1 Rc6 38.Rd5 e3 39.Rxf5 Bg7 40.Rc2 Bd4 41.Rd5 Re6 42.Re2 Bc3 43.g3 Bd2 44.Kg2 Re4 45.Rc5 h6 46.Kf3 Re8 47.Rd5 Rb8 48.c5 Rb1 49.c6 Rf1+ 50.Ke4 Rc1 51.Rd6 h5 52.h3 Kg7 53.Re6 Kf8 54.g4 h4 55.Kf3 Rh1 56.Kg2 Rb1 57.Rd6 Rc1 58.Rd8+ Kf7 59.Rd7+ Kf6 60.Rd6+ Kf7 61.Kf3 Bb4 62.Rd7+ Kf8 63.c7 Ke8
 47/107    -0.85    34. ... Qd7 35.Qxd7 Rxd7 36.Rfd1 Rxd1+ 37.Rxd1 Bc3 38.Rd7 h5 39.g3 Rf6 40.Kg1 h4 41.Kf1 hxg3 42.hxg3 Bb4 43.Rb7 Bc3 44.Re7 Bb4 45.Re5 Kg7 46.Bb5 Bc3 47.Rd5 Rf8 48.Kf2 Bb4 49.Bf1 Kg6 50.Rb5 Bc3 51.Bh3 Bd4+ 52.Kg2 Rf6 53.Rd5 Be3 54.Kf1 Bc1 55.Ke2 Ba3 56.Rb5 Bd6 57.Ke1 Ba3 58.Kf2 Bf8 59.Ke3 Bd6 60.g4 fxg4 61.Rg5+ Kh6
 47/107    -0.28    34. ... Qa5 35.Qe7 Qb6 36.Rfd1 Qd8 37.Qxd8 Rfxd8 38.Rxd2 Rxd2 39.g3 Bb2 40.Re1 Kg7 41.Re2 Bc3 42.Rxd2 Bxd2 43.Kg2 h5 44.Be2 Kh6 45.Kf2 Kg6 46.h4 Bc3 47.Bb5 Kf7 48.Ke2 Bb4 49.Bd7 Kg6 50.Be8+ Kh6 51.Bf7 Ba3 52.Be6 Kg6 53.Bc4 Bb4 54.Kf2 Bd6 55.Bb5 Bc5+ 56.Kf1 Kh6 57.Be8 Bb4 58.Bd7 Kg6 59.Kf2 Bc5+ 60.Kg2 Bb4 61.Be8+ Kh6 62.Bb5 Bc5 63.Be2 Kg6
 47/107    -0.08    34. ... Rxd6 35.Bxb5 Rd2 36.Rfd1 e3 37.Re1 Rb8 38.Be2 Bd4 39.g3 Rxb3 40.Rc8+ Kg7 41.Kg2 Rb7 42.Kf3 Rbb2 43.Rc7+ Kg6 44.Rc6+ Kg7 45.Rd6 Bb6 46.Re6 Bd4 47.Re7+ Kg6 48.h3 h5 49.Re6+ Kh7 50.Rd6 Bc3 51.Rc6 Bg7 52.Rc7 Kg6 53.Rcc1 Bf6 54.Rc6 Kg7 55.Rc7+ Kg6 56.Rc8 Kh6 57.Rc5 Kg6 58.Ra5 Bd4 59.Ra6+ Kg7 60.Ra4 Bf6 61.Ra7+ Kg6 62.Ra8 Bd4 63.Rg8+ Kf6

========================================
EngineDeepShredder13UCIx64:

 47/108   -7.56    34. ... Qxc4 35.Qxf8+ Bxf8 36.bxc4 Bc5 37.Rfd1 Ra2 38.Rd5 Be3 39.Rb1 Kg7 40.Rxf5 Bf2 41.g3 h6 42.Re5 Kf7 43.Rxe4 h5 44.Re5 h4 45.g4 h3 46.Rh5 Ra3 47.c5 Rc3 48.c6 Bd4 49.Rh6 Rc4 50.g5 Bg7 51.Rb7+ Kg8 52.Rxh3 Rc1+ 53.Kg2 Rxc6 54.f5 Rc5 55.Rh5 Rc2+ 56.Kf3 Rc3+ 57.Ke4 Rc4+ 58.Kd5 Rd4+ 59.Kc5 Rd1 60.f6 Bf8+ 61.Kc4 Rf1 62.Kd5 Rd1+ 63.Ke6 Ra1 64.g6 Ra6+ 65.Kf5 Ra5+ 66.Kg4 Ra4+ 67.Kg5 Ra5+ 68.Kh4
 47/99    -0.45    34. ... Qd7 35.Qxd7 Rxd7 36.Rfd1 Rxd1+ 37.Rxd1 Bc3 38.Rd7 h5 39.g3 Rf6 40.Kg2 h4 41.Kf2 hxg3+ 42.hxg3 Bb4 43.Rd5 Kg7 44.Bb5 Rf8 45.Bf1 Kg6 46.Bh3 Ba3 47.Rb5 Bd6 48.Ke3 Rf7 49.Rd5 Ba3 50.Ke2 Rf8 51.Re5 Bb4 52.Ke3 Ba3 53.Rb5 Bd6 54.b4 Rf6 55.Rb7 Rf7 56.Rb6 Rf6 57.Ke2 Bf8 58.Rb5 Bd6 59.Ke3
 47/99     0.00    34. ... Qa5 35.Qe7 Qd8 36.Qb4 Qd4 37.Rce1 Qb2 38.Rg1 Qd4 39.h3 h5 40.Qe7 Qf6 41.Qxf6 Bxf6 42.g3 Bc3 43.Re2 Rxe2 44.Bxe2 h4 45.gxh4 Bd2 46.Rf1 Kg7 47.Kg2 Kh6 48.Bc4 Rf6 49.Kg3 Rd6 50.Bf7 Kg7 51.Bc4 Kh6
 47/99     0.00    34. ... Rxd6 35.Bxb5 Rd2 36.Rfd1 e3 37.Re1 Rb8 38.g3 Rxb5 39.Rc8+ Bf8 40.Rxf8+ Kg7 41.Re8 Rxb3 42.R8xe3 Rbb2 43.Re7+ Kg8 44.Re8+ Kg7 45.R8e7+

========================================
Deep Rybka 4.1 SSE42 x64:
 32    -0.14    34. ... Qa5 35.Qe7 Qd8 36.Qb4 Qd4 37.Rce1 Qb2 38.Rg1 Qd4 39.h3 h6 40.Qe7 Kh7 41.Ra1 Qd8 42.Ra7 Qxe7 43.Rxe7 Kg6 44.Re6+ Rf6 45.g4 Rxe6 46.Bxe6 fxg4 47.Rxg4+ Kf6 48.f5 e3 49.Re4 Re2
 32    -0.08    34. ... Rxd6 35.Bxb5 Rfd8 36.g3 Rd2 37.Rfe1 Bf8 38.Re2 Rxe2 39.Bxe2 Rd2 40.Bb5 Bb4 41.Rc4 Bd6 42.Rc3 Kg7 43.Re3 Rb2 44.Bc4 h5 45.Re2 Rxe2 46.Bxe2 h4 47.Kg2 Bb4 48.Bb5 hxg3 49.hxg3 Be1

========================================
Fire 5 x64 popcnt:
 42    -5.29    34. ... Qxc4 35.Qxf8+ Bxf8 36.bxc4 Rd6 37.Rfd1 Rc6 38.Rd5 e3 39.Rxf5 Ba3 40.Rc2 Re6 41.Re2 Bb4 42.c5 Re4 43.g3 Bd2 44.Kg2 Rc4 45.Rd5 Rc1 46.Kf3 Rf1+ 47.Ke4 Rc1 48.g4 Kg8 49.f5 h6 50.h4 Bb4 51.Rd8+ Kf7 52.Rd7+ Ke8 53.Rh7 Rxc5 54.Ra2 Ba5 55.Rxh6 e2 56.Rxe2 Kf7 57.Ra2 Rb5 58.Rh7+ Kg8 59.Ra7 Rb4+ 60.Kd5 Bb6 61.Rb7 Ba5 62.Rxb4 Bxb4 63.g5 Be1 64.Ra8+ Kh7 65.Ra7+ Kg8
 42    -0.56    34. ... Qd7 35.Qxd7 Rxd7 36.Rfd1 Rxd1+ 37.Rxd1 Bc3 38.g3 Ra8 39.h4 Ra2 40.b4 Rc2 41.h5 Bxb4 42.h6 Bd2 43.Be6 Rc1 44.Rxc1 Bxc1 45.Bxf5 e3 46.Bd3 Ba3 47.Kg2 Bf8 48.Kf3 Bxh6 49.Kxe3 Bf8 50.g4 Kg7 51.Bb5 h6 52.Bc4 Bd6 53.Bd3 Bc5+ 54.Ke4 Kf6 55.Bc4 Bd6 56.Bb5 Bc5 57.Bd3 Bd6 58.Kf3 Kg7 59.Bc4 Kg6 60.Bb5 Kg7 61.Ke4 Kf6 62.Bc6 Kg6 63.Kf3 Kf6 64.Be4 Bb4
 42    -0.07    34. ... Qa5 35.Qe7 Qd8 36.Qb4 Qd4 37.Rce1 Qb2 38.Rg1 Qd4 39.Qe7 Qf2 40.Ref1 Qb6 41.Rd1 Qd8 42.Qxd8 Rfxd8 43.Rxd2 Rxd2 44.g3 Bc3 45.Rc1 Bb4 46.Re1 Rxh2+ 47.Kxh2 Bxe1 48.Be6 e3 49.Bc4 Bb4 50.Kg2 Be1 51.Bd3 Kg7 52.Kf3 Kf6 53.Kxe3 Bxg3 54.b4 Bh2 55.b5 Bg1+ 56.Kf3 Bc5 57.Bc2 Bd4 58.Bb3 Ke7 59.Kg3 Bc5 60.Bg8 h6 61.Bb3 Kd7 62.Bc2 Ke6 63.Bd3 Bd4
 42     0.00    34. ... Rxd6 35.Bxb5 Rd2 36.g3 Rb8 37.Bc4 Rbd8 38.Rce1 Bc3 39.Re3 Rc2 40.Re2 Rxe2 41.Bxe2 Rd2 42.Bc4 Kg7 43.Rc1 Bb4 44.Ra1 Rb2 45.Ra7+ Kg6 46.Ra6+ Kg7 47.Ra7+
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Old 2017-04-15, 12:46   #5
WMHalsdorf
 
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From dh1 post it would appear that Rxd6 is better but there is a difference at move 36 as to what white plays. The defensive g3 or the aggressive Rfd1.
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