Houdini finds mate where R4 crashes and SF sees a draw.

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zullil
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Re: Houdini finds mate where R4 crashes and SF sees a draw.

Post by zullil » Sat Feb 12, 2011 1:22 am

[D] 1K1n2q1/1p4pR/1prPPpPn/1RB1p1rP/8/1B2p3/2p2b2/1k2N3 w - - 0 1

Quicksort

Re: Houdini finds mate where R4 crashes and SF sees a draw.

Post by Quicksort » Sat Feb 12, 2011 1:27 am

OK, Louis. I should have posted the position. Too happy...Robert rules.

tmokonen
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Re: Houdini finds mate where R4 crashes and SF sees a draw.

Post by tmokonen » Sat Feb 12, 2011 2:07 am

Many different versions of Fruit and Toga also crash and burn when given this position.

Quicksort

Re: Houdini finds mate where R4 crashes and SF sees a draw.

Post by Quicksort » Sat Feb 12, 2011 2:13 am

Too bad... Booh !

Dirt
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Re: Houdini finds mate where R4 crashes and SF sees a draw.

Post by Dirt » Sat Feb 12, 2011 4:14 am

zullil wrote:[D] 1K1n2q1/1p4pR/1prPPpPn/1RB1p1rP/8/1B2p3/2p2b2/1k2N3 w - - 0 1
I had to follow Houdini's line for 31 plies, until the knight on h6 was taken and the king moved to e1, before Stockfish 2.0 saw an advantage for white. Crazy position.

Albert Silver
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Re: Houdini finds mate where R4 crashes and SF sees a draw.

Post by Albert Silver » Sat Feb 12, 2011 4:32 am

Doesn't crash here. Just says mate in 75 after 36 seconds.

1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Ba3+ Kd2[] 5.Bb4+[] Kc1[] 6.Ba3+ Kd2[] 7.Bb4+[] Kc1[] 8.Ba3+ Kd2[] 9.Bb4+[] Kc1[] 10.Ba3+ Kd2[] 11.Bb4+[] Kc1[] 12.Ba3+ Kd2[] 13.Bb4+[] Kc1[] 14.Ba3+ Kd2[] 15.Bb4+[] Kc1[] 16.Ba3+
+- (12.67 ++) Depth: 13 00:00:10 1602kN
1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Nd3+[] Kd1[] 5.Nxf2+ exf2[] 6.Rd5+[] Kc1[] 7.Ba3+[] Kb1[] 8.Rb5+[] Ka1[] 9.Bb2+[] Kb1[] 10.Bd4+[] Kc1[] 11.Be3+[] Kd1 12.Rd5+[] Ke1 13.Bd2+[] Kd1 14.Bxg5+[] Ke1 15.Bd2+[] Kd1 16.Bb4+[]
+- (14.74) Depth: 13 00:00:31 4732kN
1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Nd3+[] Kd1[] 5.Nxf2+ exf2[] 6.Rd5+[] Kc1[] 7.Ba3+[] Kb1[] 8.Rb5+[] Ka1[] 9.Bb2+[] Kb1[] 10.Bd4+[] Kc1[] 11.Be3+[] Kd1 12.Rd5+[] Ke1 13.Bd2+[] Kd1 14.Bxg5+[] Ke1 15.Bd2+[] Kd1 16.Bb4+[]
+- (#75) Depth: 14 00:00:36 5465kN

1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Nd3+[] Kd1[] 5.Nxf2+[] exf2[] 6.Rd5+[] Kc1[] 7.Ba3+[] Kb1[] 8.Rb5+[] Ka1[] 9.Bb2+[] Kb1[] 10.Bd4+[] Kc1[] 11.Be3+[] Kd1 12.Rd5+[] Ke1 13.Bd2+[] Kd1 14.Bxg5+[] Ke1 15.Bd2+[] Kd1 16.Bb4+[]
+- (#75) Depth: 15 00:00:42 6047kN
1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Nd3+[] Kd1[] 5.Nxf2+[] exf2[] 6.Rd5+[] Kc1[] 7.Ba3+[] Kb1[] 8.Rb5+[] Ka1[] 9.Bb2+[] Kb1[] 10.Bd4+[] Kc1[] 11.Be3+[] Kd1 12.Rd5+[] Ke1 13.Bd2+[] Kd1 14.Bxg5+[] Ke1 15.Bd2+[] Kd1 16.Bb4+[]
+- (#75) Depth: 16 00:00:52 8024kN
1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Nd3+[] Kd1[] 5.Nxf2+[] exf2[] 6.Rd5+[] Kc1[] 7.Ba3+[] Kb1[] 8.Rb5+[] Ka1[] 9.Bb2+[] Kb1[] 10.Bd4+[] Kc1[] 11.Be3+[] Kd1 12.Rd5+[] Ke1 13.Bd2+[] Kd1 14.Bxg5+[] Ke1 15.Bd2+[] Kd1 16.Bb4+[]
+- (#75) Depth: 17 00:01:10 12731kN
"Tactics are the bricks and sticks that make up a game, but positional play is the architectural blueprint."

Mincho Georgiev
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Re: Houdini finds mate where R4 crashes and SF sees a draw.

Post by Mincho Georgiev » Sat Feb 12, 2011 7:06 am

Awesome position, Louis, thanks for sharing it!
This one can show (as in my case) how improperly handled triple repetition detection can mix up the 'go-further' search for a particular position.
I have to reconsider it in my implementation helping myself with positions like this one. I think that a lot of engines will suffer too with it.

Paloma
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Re: Houdini finds mate where R4 crashes and SF sees a draw.

Post by Paloma » Sat Feb 12, 2011 12:24 pm

4.1 beta ?

Damir
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Re: Houdini finds mate where R4 crashes and SF sees a draw.

Post by Damir » Sat Feb 12, 2011 12:28 pm

Albert Silver wrote:
Doesn't crash here. Just says mate in 75 after 36 seconds.

1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Ba3+ Kd2[] 5.Bb4+[] Kc1[] 6.Ba3+ Kd2[] 7.Bb4+[] Kc1[] 8.Ba3+ Kd2[] 9.Bb4+[] Kc1[] 10.Ba3+ Kd2[] 11.Bb4+[] Kc1[] 12.Ba3+ Kd2[] 13.Bb4+[] Kc1[] 14.Ba3+ Kd2[] 15.Bb4+[] Kc1[] 16.Ba3+
+- (12.67 ++) Depth: 13 00:00:10 1602kN
1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Nd3+[] Kd1[] 5.Nxf2+ exf2[] 6.Rd5+[] Kc1[] 7.Ba3+[] Kb1[] 8.Rb5+[] Ka1[] 9.Bb2+[] Kb1[] 10.Bd4+[] Kc1[] 11.Be3+[] Kd1 12.Rd5+[] Ke1 13.Bd2+[] Kd1 14.Bxg5+[] Ke1 15.Bd2+[] Kd1 16.Bb4+[]
+- (14.74) Depth: 13 00:00:31 4732kN
1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Nd3+[] Kd1[] 5.Nxf2+ exf2[] 6.Rd5+[] Kc1[] 7.Ba3+[] Kb1[] 8.Rb5+[] Ka1[] 9.Bb2+[] Kb1[] 10.Bd4+[] Kc1[] 11.Be3+[] Kd1 12.Rd5+[] Ke1 13.Bd2+[] Kd1 14.Bxg5+[] Ke1 15.Bd2+[] Kd1 16.Bb4+[]
+- (#75) Depth: 14 00:00:36 5465kN

1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Nd3+[] Kd1[] 5.Nxf2+[] exf2[] 6.Rd5+[] Kc1[] 7.Ba3+[] Kb1[] 8.Rb5+[] Ka1[] 9.Bb2+[] Kb1[] 10.Bd4+[] Kc1[] 11.Be3+[] Kd1 12.Rd5+[] Ke1 13.Bd2+[] Kd1 14.Bxg5+[] Ke1 15.Bd2+[] Kd1 16.Bb4+[]
+- (#75) Depth: 15 00:00:42 6047kN
1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Nd3+[] Kd1[] 5.Nxf2+[] exf2[] 6.Rd5+[] Kc1[] 7.Ba3+[] Kb1[] 8.Rb5+[] Ka1[] 9.Bb2+[] Kb1[] 10.Bd4+[] Kc1[] 11.Be3+[] Kd1 12.Rd5+[] Ke1 13.Bd2+[] Kd1 14.Bxg5+[] Ke1 15.Bd2+[] Kd1 16.Bb4+[]
+- (#75) Depth: 16 00:00:52 8024kN
1.Bc4+ Kc1[] 2.Ba3+[] Kd2[] 3.Bb4+[] Kc1[] 4.Nd3+[] Kd1[] 5.Nxf2+[] exf2[] 6.Rd5+[] Kc1[] 7.Ba3+[] Kb1[] 8.Rb5+[] Ka1[] 9.Bb2+[] Kb1[] 10.Bd4+[] Kc1[] 11.Be3+[] Kd1 12.Rd5+[] Ke1 13.Bd2+[] Kd1 14.Bxg5+[] Ke1 15.Bd2+[] Kd1 16.Bb4+[]
+- (#75) Depth: 17 00:01:10 12731kN


Does not crash ?? Why don't you show the name of the engine that has

been used ? It might as well be any.

Hmm let's see some people here posted a position where Rybka crashes.

And all you did was post analysis which shows no engine name...

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