7 men Rook endgames H4 vs SF in recent TCEC stage 1b.

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AdminX
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Re: 7 men Rook endgames H4 vs SF in recent TCEC stage 1b.

Post by AdminX » Tue Sep 08, 2015 12:35 pm

Vinvin wrote:
Can you point when Stockfish got a winning endgame for the first time ?
Hi Vincent,

Looks like things started to go wrong on white's 84th move. When white played Kb2. Tablebase show Kd2 would have held the draw. However after 84. Kb2 Ra4 give mate in 59 moves.

[d]8/R7/5pk1/p7/6P1/r7/2K5/8 w - - 9 84

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Carlos777
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Re: 7 men Rook endgames H4 vs SF in recent TCEC stage 1b.

Post by Carlos777 » Tue Sep 08, 2015 3:34 pm

It would be interesting if someone with good hardware could analyze the position before 84. Kb2 with Houdini and 5 men Nalimov and then with syzygy also 5 men and see if Houdini can find Kd1 or Kd2.

Anybody knows why Houdini is using nalimov instead of syzygy in TCEC?

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Re: 7 men Rook endgames H4 vs SF in recent TCEC stage 1b.

Post by RJN » Tue Sep 08, 2015 4:44 pm

Carlos777 wrote:It would be interesting if someone with good hardware could analyze the position before 84. Kb2 with Houdini and 5 men Nalimov and then with syzygy also 5 men and see if Houdini can find Kd1 or Kd2.

Anybody knows why Houdini is using nalimov instead of syzygy in TCEC?
A question I asked myself on the TCEC chat, especially considering that the H4 manual recommends Syzygy over the other TB formats it supports.
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