Author: Albert Silver
Date: 07:51:03 01/30/06
Go up one level in this thread
On January 30, 2006 at 10:16:52, K. Burcham wrote:
It's impossible to verify or check this as you didn't provide the previous
moves.
Albert
>Is this an example why Johan de Koning clears hash between moves?
>Qb4 is a blunder. Rybka played Qb4 in the game, instead of the safer Qb5. If I
>play through the moves at depth 11 with hash info, Rybka will blunder (first
>example).
>
>If I clear the hash and play from this position with empty hash, Rybka does not
>show blunder Qb4 in eval (second example).
>
>Nichtda,F - Qwertyui,R, 3m + 0s, rated blitz 2006
>2Q5/1p2kb2/1q3p1P/2p2P2/3pP3/4b2R/8/3B3K b - - 0 1
>
>Rybka 1.0 Beta 32-bit:
>
>46...Qb4 47.Qc7+ Ke8 48.Qc8+ Ke7 49.Qc7+ Ke8 50.Qc8+ Ke7 51.Qc7+
> = (0.00) Depth: 7 00:00:00
>46...Qb4 47.Qc7+ Ke8 48.Qc8+ Ke7 49.Qc7+ Ke8 50.Qc8+ Ke7 51.Qc7+
> = (0.00) Depth: 8 00:00:00
>46...Qb4 47.Qc7+ Ke8 48.Qc8+ Ke7 49.Qc7+ Ke8 50.Qc8+ Ke7 51.Qc7+
> = (0.00) Depth: 9 00:00:00
>46...Qb4 47.Qc7+ Ke8 48.Qc8+ Ke7 49.Qc7+ Ke8 50.Qc8+ Ke7 51.Qc7+
> = (0.00) Depth: 10 00:00:00
>46...Qb4 47.Qc7+ Ke8 48.Qc8+ Ke7 49.Qc7+ Ke8 50.Qc8+ Ke7 51.Qc7+
> = (0.00) Depth: 11 00:00:01
>46...Qb4 47.Qc7+ Ke8 48.Qg3 Qb1 49.Qg4 Bxh6 50.Rxh6 Ke7 51.Rh8
> +- (3.17) Depth: 12 00:00:03 286kN
>46...Qb5 47.Rf3 Bxh6 48.e5 Qc6 49.exf6+ Kd6 50.Qb8+ Qc7 51.Qxc7+
> ² (0.27) Depth: 12 00:00:25 1637kN
>46...Qb5 47.Rf3 Bxh6 48.e5 Bd5 49.Qc7+ Qd7 50.exf6+ Ke8 51.f7+
> ² (0.53) Depth: 13 00:00:48 3012kN
>46...Qb5 47.Rf3 Bxh6 48.Qc7+ Qd7 49.Qxc5+ Qd6 50.Qb5 b6 51.Rh3
> ² (0.63) Depth: 14 00:01:17 4956kN
>
>
>46...Qb5 47.Qc7+ Ke8 48.Qc8+ Ke7 49.Qc7+ Ke8 50.Qc8+ Ke7 51.Qc7+
> = (0.00) Depth: 7 00:00:00 9kN
>46...Qb5 47.Qc7+ Ke8 48.Qc8+ Ke7 49.Qc7+ Ke8 50.Qc8+ Ke7 51.Qc7+
> = (0.00) Depth: 8 00:00:00 19kN
>46...Qb5 47.Qc7+ Ke8 48.Qc8+ Ke7 49.Qc7+ Ke8 50.Qc8+ Ke7 51.Qc7+
> = (0.00) Depth: 9 00:00:00 43kN
>46...Qb5 47.Qc7+ Ke8 48.Qc8+ Ke7 49.Qc7+ Ke8 50.Qc8+ Ke7 51.Qc7+
> = (0.00) Depth: 10 00:00:01 96kN
>46...Qb5 47.Qc7+ Ke8 48.Qc8+ Ke7 49.Qc7+ Ke8 50.Qc8+ Ke7 51.Qc7+
> = (0.00) Depth: 11 00:00:03 252kN
>46...Qb5 47.Rf3 Bxh6 48.e5 fxe5 49.Qc7+ Kf8 50.Qd8+ Qe8 51.Qd6+
> = (0.15) Depth: 12 00:00:14 937kN
>46...Qb5 47.Rf3 Bxh6 48.e5 Bd5 49.Qc7+ Qd7 50.exf6+ Ke8 51.f7+
> ² (0.53) Depth: 13 00:00:43 2605kN
>46...Qb5 47.Rf3 Bxh6 48.Qc7+ Qd7 49.Qxc5+ Qd6 50.Qb5 b6 51.Rh3
> ± (0.75) Depth: 14 00:01:17 4809kN
>46...Qb5 47.Qc7+ Ke8 48.Rf3 Qb1 49.Qc8+ Ke7 50.Qxc5+ Kd7 51.Qc2
> ± (0.88) Depth: 15 00:02:59 11338kN
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