Best move - human-like draw?

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Howard E
Posts: 261
Joined: Wed Mar 08, 2006 8:49 pm

Best move - human-like draw?

Post by Howard E »

[d] 8/3b4/5p1p/3Pp2P/3kP3/4N1K1/3b1PB1/8 b KQkq - 6 75 bm Bxe3;

Once the first few forced moves are entered most programs see a draw. The follow up is to remove whites center pawns and not worry about being a bishop down. Unless someone finds a missing winning resource for a white win?
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AdminX
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Joined: Mon Mar 13, 2006 2:34 pm
Location: Acworth, GA

Re: Best move - human-like draw?

Post by AdminX »

Howard E wrote:[d] 8/3b4/5p1p/3Pp2P/3kP3/4N1K1/3b1PB1/8 b KQkq - 6 75 bm Bxe3;

Once the first few forced moves are entered most programs see a draw. The follow up is to remove whites center pawns and not worry about being a bishop down. Unless someone finds a missing winning resource for a white win?
Hi Howard,

Zappa Mexico II sees it right out of the gate.

Analysis by Zappa Mexico II:

1...Bxe3 2.fxe3+ Kxe3 3.d6 Ba4 4.Bf3 Kd3 5.Bd1 Bb5 6.Bg4 Kxe4 7.d7 Bxd7 8.Bxd7 f5 9.Bb5 Kd5 10.Kf3 e4+ 11.Kf4 Ke6 12.Bc4+ Kf6 13.Bb3 Kg7 14.Kxf5 e3 15.Kg4 Kh8 16.Kh4 Kh7 17.Bc2+ Kg7 18.Kg3 e2 19.Kf2 e1Q+ 20.Kxe1
= (0.01) Depth: 14/25 00:00:00 697kN, tb=5
= (0.01) Depth: 24/49 00:01:17 212mN, tb=20291
"Good decisions come from experience, and experience comes from bad decisions."
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Kurt Utzinger
Posts: 169
Joined: Sun May 11, 2008 10:31 pm
Location: Switzerland

Re: Best move - human-like draw?

Post by Kurt Utzinger »

No problem for Deep Shredder 11 UCI in the MV-mode:

Code: Select all

8/3b4/5p1p/3Pp2P/3kP3/4N1K1/3b1PB1/8 b - -

Engine: Deep Shredder 11 UCI (256 MB)
von Stefan Meyer-Kahlen

26     0:16   +0.01    1...Lxe3 2.fxe3+ Kxe3 3.d6 Kd4 4.Lh3 Kxe4 
                       5.Lxd7 Kd5 6.Lb5 Kxd6 7.Kg4 (64.845.786) 4004 
                       SB:136.541


Kurt
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Cyclone 3.0

Post by kgburcham »

49 seconds

[d] 8/3b4/5p1p/3Pp2P/3kP3/4N1K1/3b1PB1/8 b - -

Cyclone 3.0

22/43 0:49 0.00 1...Bxe3 2.fxe3+ Kxe3 3.d6 Be8 4.Bh3 Kxe4 5.d7 Bxd7 6.Bxd7 Kd5 7.Kf3 Kd6 8.Bf5 Ke7 9.Ke4 Kf7 10.Bh3 Kg7 11.Kf5 e4 12.Kxe4 f5+ 13.Bxf5 Kg8 14.Bh3 Kg7 (60.455.883) 4900
23/43 0:49 0.00 1...Bxe3 2.fxe3+ Kxe3 3.d6 Be8 4.Bh3 Kxe4 5.d7 Bxd7 6.Bxd7 Kd5 7.Kf3 Kd6 8.Bf5 Ke7 9.Ke4 Kf7 10.Bh3 Kg7 11.Kf5 e4 12.Kxe4 f5+ 13.Bxf5 Kg8 14.Bh3 Kg7 (60.463.550) 4900
24/43 0:49 0.00 1...Bxe3 2.fxe3+ Kxe3 3.d6 Be8 4.Bh3 Kxe4 5.d7 Bxd7 6.Bxd7 Kd5 7.Kf3 Kd6 8.Bf5 Ke7 9.Ke4 Kf7 10.Bh3 Kg7 11.Kf5 e4 12.Kxe4 f5+ 13.Bxf5 Kg8 14.Bh3 Kg7 (60.476.233) 4899
25/45 0:50 0.00 1...Bxe3 2.fxe3+ Kxe3 3.d6 Be8 4.Bh3 Kxe4 5.d7 Bxd7 6.Bxd7 Kd5 7.Kf3 Kd6 8.Bf5 Ke7 9.Ke4 Kf7 10.Bh3 Kg7 11.Kf5 e4 12.Kxe4 f5+ 13.Bxf5 Kg8 14.Bh3 Kg7 (62.070.835) 4928
26/54 0:53 0.00 1...Bxe3 2.fxe3+ Kxe3 3.d6 Be8 4.Bh3 Kxe4 5.d7 Bxd7 6.Bxd7 Kd5 7.Kf3 Kd6 8.Bf5 Ke7 9.Ke4 Kf7 10.Bh3 Kg7 11.Kf5 Kf7 12.Kg4 Kg7 13.Kg3 Kh8 14.Bg4 Kg7 (66.360.388) 4970
27/55 1:04 +0.01 1...Bxe3 2.fxe3+ Kxe3 3.d6 Be8 4.Bh3 Kxe4 5.d7 Bxd7 6.Bxd7 Kd5 7.Bf5 Kd6 8.Kg4 Ke7 9.Bb1 Kf8 10.Ba2 Kg7 11.Kf5 e4 12.Kg4 e3 13.Kg3 Kh8 14.Kg2 Kg7 (82.155.158) 5119
28/64 1:22 0.00 1...Bxe3 2.fxe3+ Kxe3 3.d6 Be8 4.Bh3 Kxe4 5.d7 Bxd7 6.Bxd7 Kd5 7.Bf5 Kd6 8.Kg4 Ke7 9.Bb1 Kf8 10.Ba2 Kg7 11.Kf5 e4 12.Kxe4 Kh7 13.Bf7 f5+ 14.Kf3 Kh8 (107.337.396) 5177
29/64 2:03 +0.01 1...Bxe3 2.fxe3+ Kxe3 3.d6 Be8 4.Bh3 Kxe4 5.d7 Bxd7 6.Bxd7 Kd5 7.Bf5 Kd6 8.Kg4 Ke7 9.Bd3 Kf8 10.Kf5 Kg7 11.Be4 Kh8 12.Kg6 f5 13.Kxf5 Kh7 14.Kg4+ Kg7 (160.586.455) 5183
30/68 3:10 0.00 1...Bxe3 2.fxe3+ Kxe3 3.d6 Be8 4.Bh3 Kxe4 5.d7 Bxd7 6.Bxd7 Kd5 7.Bf5 Kd6 8.Kg4 Ke7 9.Bd3 Kf8 10.Kf5 Kg7 11.Be4 Kh8 12.Kg6 f5 13.Kxf5 Kh7 14.Kg4+ Kg7 (260.798.784) 5487
31/68 3:50 +0.01 1...Bxe3 2.fxe3+ Kxe3 3.d6 Be8 4.Bh3 Kxe4 5.d7 Bxd7 6.Bxd7 Kd5 7.Bf5 Kd6 8.Kg4 Ke7 9.Bd3 Kf8 10.Kf5 Kg7 11.Be4 Kh8 12.Kg6 f5 13.Kxf5 Kh7 14.Kg4+ Kg7 (316.198.733) 5484
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Howard E
Posts: 261
Joined: Wed Mar 08, 2006 8:49 pm

Re: Best move - human-like draw?

Post by Howard E »

The line by Shredder is the draw sequence that I was looking at.
However, it seems like other engines found drawing lines also that are different.
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royb
Posts: 566
Joined: Thu Mar 09, 2006 12:53 am

Re: Best move - human-like draw?

Post by royb »

Howard E wrote:[d] 8/3b4/5p1p/3Pp2P/3kP3/4N1K1/3b1PB1/8 b KQkq - 6 75 bm Bxe3;

Once the first few forced moves are entered most programs see a draw. The follow up is to remove whites center pawns and not worry about being a bishop down. Unless someone finds a missing winning resource for a white win?
Rybka-3 64-bit cannot seem to find the handle on this one. It prefers Be8 after more than 8 minutes (1.67 GHz ; 1 CPU) and 26 ply:

23 +0.64 1.... Be8 2.Bf3 Bxe3 3.fxe3+ Kc5 4.Bg4 Ba4 5.Kf2 Bc2 6.Bf3 Bd3 7.Bg2 Kd6 8.Kf3 Bb5 9.Bh3 (125.49)
24 +0.64 1.... Be8 2.Bf3 Bxe3 3.fxe3+ Kc5 4.Bg4 Ba4 5.Kf2 Bc2 6.Bf3 Bd3 7.Bg2 Kd6 8.Kf3 Bb5 9.Bh3 (199.86)
25 +0.64 1.... Be8 2.Bf3 Bxe3 3.fxe3+ Kc5 4.Bg4 Ba4 5.Kf2 Bc2 6.Bf3 Bd3 7.Bg2 Kd6 8.Kf3 Bb5 9.Bh3 Ba4 (304.04)
26 +0.64 1.... Be8 2.Bf3 Bxe3 3.fxe3+ Kc5 4.Bg4 Ba4 5.Kf2 Bc2
6.Bf3 Bd3 7.Bg2 Kd6 8.Kf3 Bb5 9.Bh3 Ba4 (484.38)

Glaurung 2.2 (using a few tweaks I normally use for analysis) finds it after a think of slightly less than 2 minutes:

24 +0.90 1.... Be8 2.Nf5+ Kc5 3.Kg4 Bd7 4.Bf1 Be1 5.f4 Bd2 6.fxe5 fxe5 7.Bd3 Bxf5+ 8.Kxf5 Kd6 9.Be2 Be3 10.Bf1 Bc5 11.Bc4 Bb6 12.Bd3 Bd4 13.Kg6 Be3 14.Kf5 (92.89)
24 +0.00 1.... Bxe3 2.fxe3+ Kxe3 3.Bh3 Kxe4 4.Bxd7 Kxd5 5.Kf3 Kd6 6.Bf5 e4+ 7.Kxe4 Ke7 8.Kf3 Kf7 9.Ke3 Kg7 10.Kf3 Kg8 11.Kg4 Kg7 12.Kf3 (106.05)
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