Bug in endgame tablebase use in Hiarcs 12 ??

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El Gringo
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Bug in endgame tablebase use in Hiarcs 12 ??

Post by El Gringo »

Hi,

In match no 30 against Rybka i saw this strange behavior
[fen]3k4/2bP4/4K3/8/6B1/8/8/8 w - - 17 135[/fen]

FEN: 3k4/2bP4/4K3/8/6B1/8/8/8 w - - 17 135

Hiarcs 12 MP 2Cpu:
33/36 00:00 1.559.881 2.970.336 +0,95 Bg4e2 Bc7b6 Be2f1 Bb6e3 Bf1b5 Be3g5 Bb5c6 Kd8c7 Bc6g2 Bg5h4 Bg2h3 Kc7d8 Bh3g4 Bh4e7 Bg4d1 Be7g5 Bd1f3 Kd8c7 Bf3d5 Bg5h4 Bd5g2 Kc7d8 Bg2f1 Bh4g5 Bf1b5 Bg5h4 Bb5c6 Kd8c7 Bc6a4 Bh4g5
33/36 00:00 1.602.073 3.011.415 +0,95 Bg4e2 Bc7b6 Be2f1 Bb6e3 Bf1b5 Be3g5 Bb5c6 Kd8c7 Bc6g2 Bg5h4 Bg2h3 Kc7d8 Bh3g4 Bh4e7 Bg4d1 Be7g5 Bd1f3 Kd8c7 Bf3d5 Bg5h4 Bd5g2 Kc7d8 Bg2f1 Bh4g5 Bf1b5 Bg5h4 Bb5c6 Kd8c7 Bc6a4 Bh4g5
34/38 00:00 2.794.568 2.987.786 +0,95 Bg4e2 Bc7b6 Be2f1 Bb6e3 Bf1b5 Be3g5 Bb5c6 Kd8c7 Bc6g2 Bg5h4 Bg2h3 Kc7d8 Bh3g4 Bh4e7 Bg4d1 Be7g5 Bd1f3 Kd8c7 Bf3d5 Bg5h4 Bd5g2 Kc7d8 Bg2h3 Bh4f2 Ke6f7 Bf2e1 Bh3g4 Be1g3 Kf7f6 Bg3c7
35/38 00:01 4.500.715 2.954.232 +0,95 Bg4e2 Bc7b6 Be2f1 Bb6e3 Bf1b5 Be3g5 Bb5c6 Kd8c7 Bc6g2 Bg5h4 Bg2h3 Kc7d8 Bh3g4 Bh4e7 Bg4d1 Be7g5 Bd1f3 Kd8c7 Bf3d5 Bg5h4 Bd5g2 Kc7d8 Bg2h3 Bh4f2 Ke6f7 Bf2e1 Bh3g4 Be1g3 Kf7f6 Bg3c7
36/41 00:02 7.417.914 3.000.933 +0,95 Bg4e2 Bc7b6 Be2f1 Bb6e3 Bf1b5 Be3g5 Bb5c6 Bg5h4 Bc6g2 Bh4f6 Bg2h3 Bf6c3 Bh3f1 Bc3f6 Bf1g2 Bf6h4 Bg2h3 Bh4f2 Ke6f7 Bf2e1 Bh3g4 Be1g3 Kf7f6 Bg3c7
37/41 00:04 12.789.294 3.008.152 +0,95 Bg4e2 Bc7b6 Be2f1 Bb6e3 Bf1b5 Be3g5 Bb5c6 Bg5h4 Bc6g2 Bh4f6 Bg2h3 Bf6c3 Bh3f1 Bc3f6 Bf1g2 Bf6h4 Bg2h3 Bh4f2 Ke6f7 Bf2e1 Bh3g4 Be1g3 Kf7f6 Bg3c7
38/42 00:06 21.138.289 3.015.872 +0,95 Bg4e2 Bc7b6 Be2f1 Bb6e3 Bf1b5 Be3g5 Bb5c6 Bg5h4 Bc6g2 Bh4f6 Bg2h3 Bf6c3 Bh3f1 Bc3f6 Bf1g2 Bf6h4 Bg2h3 Bh4f2 Ke6f7 Bf2e1 Bh3g4 Be1g3 Kf7f6 Bg3c7
39/44 00:11 33.590.479 3.030.709 +0,95 Bg4e2 Bc7b6 Be2f1 Bb6e3 Bf1b5 Be3g5 Bb5c6 Bg5h4 Bc6g2 Bh4f6 Bg2h3 Bf6c3 Bh3f1 Bc3f6 Bf1g2 Bf6h4 Bg2h3 Bh4f2 Ke6e5 Bf2b6 Ke5d6 Bb6a5 Bh3g2 Ba5b4+ Kd6e6 Bb4d2 Bg2f3 Bd2g5 Bf3e2 Kd8c7
40/44 00:15 48.060.210 3.045.249 +0,95 Bg4e2 Bc7b6 Be2f1 Bb6e3 Bf1b5 Be3g5 Bb5c6 Bg5h4 Bc6g2 Bh4f6 Bg2h3 Bf6c3 Bh3f1 Bc3f6 Bf1g2 Bf6h4 Bg2h3 Bh4f2 Ke6e5 Bf2b6 Ke5d6 Bb6a5 Bh3g2 Ba5b4+ Kd6e6 Bb4d2 Bg2f3 Bd2g5 Bf3d5 Kd8c7
41/44 00:22 68.929.847 3.075.185 +0,95 Bg4e2 Bc7b6 Be2f1 Bb6e3 Bf1b5 Be3g5 Bb5c6 Bg5h4 Bc6g2 Bh4f6 Bg2h3 Bf6c3 Bh3f1 Bc3f6 Bf1g2 Bf6h4 Bg2h3 Bh4f2 Ke6e5 Bf2b6 Ke5d6 Bb6a5 Bh3g2 Ba5b4+ Kd6e6 Bb4d2 Bg2f3 Bd2g5 Bf3g4 Bg5h4 Bg4h5 Kd8c7
42/47 00:32 100.499.394 3.086.906 +0,95 Bg4e2 Bc7b6 Be2f1 Bb6e3 Bf1b5 Be3g5 Bb5c6 Bg5h4 Bc6g2 Bh4f6 Bg2h3 Bf6c3 Bh3f1 Bc3f6 Bf1g2 Bf6h4 Bg2h3 Bh4f2 Ke6e5 Bf2b6 Ke5d6 Bb6a5 Bh3g2 Ba5b4+ Kd6e6 Bb4d2 Bg2f3 Bd2g5 Bf3g4 Bg5h4 Ke6d6 Bh4g3+

This is a 5-men Tb draw. But Hiarcs 12 is still calculating
Rybka immediately goes at 59 ply and gives a tb-draw.

Hiarcs 11.1 UCI sees the tb-draw too !
FEN: 3k4/2bP4/4K3/8/6B1/8/8/8 w - - 17 135

Hiarcs 11.1 MP 4CPU:
38/27 00:00 1.440.245 2.420.547 0,00 Bg4f3 Bc7f4 Bf3e4 Bf4c7 Be4d5 Bc7g3 Bd5e4 Bg3c7
38/29 00:00 1.515.600 2.421.086 0,00 Bg4f3 Bc7f4 Bf3e4 Bf4c7 Be4d5 Bc7g3 Bd5e4 Bg3c7
39/29 00:00 1.681.596 2.440.632 0,00 Bg4f3 Bc7f4 Bf3e4 Bf4c7 Be4d5 Bc7g3 Bd5e4 Bg3c7
40/31 00:00 1.882.983 2.404.831 0,00 Bg4f3 Bc7f4 Bf3e4 Bf4c7 Be4d5 Bc7g3 Bd5e4 Bg3c7
41/31 00:00 2.115.026 2.456.476 0,00 Bg4f3 Bc7f4 Bf3e4 Bf4c7 Be4d5 Bc7g3 Bd5e4 Bg3c7


Best
Johan Havegheer
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Harvey Williamson
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Post by Harvey Williamson »

Which GUI was this in? This looks like swindle was switched on and tb access was on for the engine but not in the GUI.
El Gringo
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Post by El Gringo »

Harvey Williamson wrote:Which GUI was this in? This looks like swindle was switched on and tb access was on for the engine but not in the GUI.
Hi Harvey,

game was played under Deep Shredder 11 GUI.
But the test above is done under Arena 1.999b5
I got the same behavior.

Best
Johan
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Harvey Williamson
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Post by Harvey Williamson »

El Gringo wrote:
Harvey Williamson wrote:Which GUI was this in? This looks like swindle was switched on and tb access was on for the engine but not in the GUI.
Hi Harvey,

game was played under Deep Shredder 11 GUI.
But the test above is done under Arena 1.999b5
I got the same behavior.

Best
Johan
Ok this makes sense Hiarcs thinks it is ahead tb are not loaded in GUI only for engine so it trys to swindle. Turn swindle off if you want to see it use the tbs in this position.
El Gringo
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Post by El Gringo »

Hi Harvey,

Swindle off and it works !!!
So never swindle in computer chess :lol:

best
Johan
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Harvey Williamson
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Post by Harvey Williamson »

El Gringo wrote:Hi Harvey,

Swindle off and it works !!!
So never swindle in computer chess :lol:

best
Johan
NO

Against a weaker engine or one that does not use tbs swindle can get a win from a drawn position. This is the default parameter and should be on.
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