Author: Robert Hyatt
Date: 07:04:18 11/10/05
Go up one level in this thread
On November 10, 2005 at 06:40:17, Camp Troll wrote:
>My computer is Intel Pentium3 1GHz, 256MB, OS is XP pro.
>I used default hash table size.
>I used Visual Studio 6.0 to compile.
>I added 2 lines to the top of chess.h.
>#define NT_i386
>#define NOEGTB
>And I inserted
>Print(4095, "Illegal hash move i = %d %s\n", i, OutputMove(tree,
>tree->hash_move[i],i,wtm));
What is the purpose of this line of code? The if() test at the top
fails if hash_move[i] is zero, which is perfectly legal. And you then
output that error message with a zero move which does not print as anything.
Here is the test that has to fail for your Print() to be executed:
if (tree->hash_move[i] && LegalMove(tree, i, wtm, tree->hash_move[i])) {
So if hash_move[i] is zero, it will fail. And there are plenty of cases where
this happens normally... If hash_move[i] is non-zero, then I legality-check it
before using it. But in your case, it is zero to start with...
>at line number 674 in utility.c of Crafty 20.1.
>That is all I changed to your source code.
>I started from initial chess position.
>I can send you exe file and source code if you can not see problem.
>This is Crafty log file.
>---------------------------------------------------------------------------
>
>Crafty v20.1
>
>White(1): ponder off
>pondering disabled.
>White(1): book off
>book file disabled.
>White(1): st 30
>search time set to 30.00.
>White(1): go
> clearing hash tables
> time surplus 0.00 time limit 30.00 (+0.00) (30.00)
> depth time score variation (1)
>Illegal hash move i = 10 null
> 10 29.83 0.14 1. e4 e5 2. Nc3 Nf6 3. Nf3 Bb4 4. a3
> Bxc3 5. dxc3 O-O 6. Bg5
> time=30.37 mat=0 n=2126629 fh=89% nps=70K
> ext-> chk=38240 cap=13366 1rep=1996 mate=2
> predicted=0 nodes=2126629 evals=1603925 50move=0
> endgame tablebase-> probes=0 hits=0
> hashing-> 28%(raw) 25%(depth) 90%(sat) 5201864%(pawn)
> hashing-> 0%(exact) 13%(lower) 0%(upper)
>
>White(1): e4
> time used: 30.37
>
> +---+---+---+---+---+---+---+---+
> 8 |<R>|<N>|<B>|<Q>|<K>|<B>|<N>|<R>|
> +---+---+---+---+---+---+---+---+
> 7 |<P>|<P>|<P>|<P>|<P>|<P>|<P>|<P>|
> +---+---+---+---+---+---+---+---+
> 6 | | . | | . | | . | | . |
> +---+---+---+---+---+---+---+---+
> 5 | . | | . | | . | | . | |
> +---+---+---+---+---+---+---+---+
> 4 | | . | | . |-P-| . | | . |
> +---+---+---+---+---+---+---+---+
> 3 | . | | . | | . | | . | |
> +---+---+---+---+---+---+---+---+
> 2 |-P-|-P-|-P-|-P-| |-P-|-P-|-P-|
> +---+---+---+---+---+---+---+---+
> 1 |-R-|-N-|-B-|-Q-|-K-|-B-|-N-|-R-|
> +---+---+---+---+---+---+---+---+
> a b c d e f g h
>
>Black(1): go
> clearing hash tables
> time surplus 0.00 time limit 30.00 (+0.00) (30.00)
> depth time score variation (1)
>Illegal hash move i = 10 null
> 10 28.92 0.17 1. ... e5 2. Nf3 Nf6 3. Nxe5 Qe7 4.
> d4 d6 5. Nf3 Qxe4+ 6. Kd2 Kd8
> time=30.24 mat=0 n=2088172 fh=90% nps=69K
> ext-> chk=41597 cap=11799 1rep=1799 mate=12
> predicted=0 nodes=2088172 evals=1611265 50move=0
> endgame tablebase-> probes=0 hits=0
> hashing-> 31%(raw) 29%(depth) 88%(sat) 5201864%(pawn)
> hashing-> 0%(exact) 11%(lower) 0%(upper)
>
>Black(1): e5
> time used: 30.24
>
> +---+---+---+---+---+---+---+---+
> 8 |<R>|<N>|<B>|<Q>|<K>|<B>|<N>|<R>|
> +---+---+---+---+---+---+---+---+
> 7 |<P>|<P>|<P>|<P>| . |<P>|<P>|<P>|
> +---+---+---+---+---+---+---+---+
> 6 | | . | | . | | . | | . |
> +---+---+---+---+---+---+---+---+
> 5 | . | | . | |<P>| | . | |
> +---+---+---+---+---+---+---+---+
> 4 | | . | | . |-P-| . | | . |
> +---+---+---+---+---+---+---+---+
> 3 | . | | . | | . | | . | |
> +---+---+---+---+---+---+---+---+
> 2 |-P-|-P-|-P-|-P-| |-P-|-P-|-P-|
> +---+---+---+---+---+---+---+---+
> 1 |-R-|-N-|-B-|-Q-|-K-|-B-|-N-|-R-|
> +---+---+---+---+---+---+---+---+
> a b c d e f g h
>
>White(2): go
> clearing hash tables
> time surplus 0.00 time limit 30.00 (+0.00) (30.00)
> depth time score variation (1)
>Illegal hash move i = 8 null
> 9-> 19.14 0.11 2. Nc3 Nf6 3. Nf3 Bb4 4. Nxe5 d6 5.
> Nd3 Bxc3 6. dxc3 Nxe4
> time=30.28 mat=0 n=2089626 fh=91% nps=69K
> ext-> chk=40563 cap=11380 1rep=1776 mate=20
> predicted=0 nodes=2089626 evals=1640666 50move=0
> endgame tablebase-> probes=0 hits=0
> hashing-> 31%(raw) 29%(depth) 88%(sat) 5201864%(pawn)
> hashing-> 0%(exact) 11%(lower) 0%(upper)
>
>White(2): Nc3
> time used: 30.28
>
> +---+---+---+---+---+---+---+---+
> 8 |<R>|<N>|<B>|<Q>|<K>|<B>|<N>|<R>|
> +---+---+---+---+---+---+---+---+
> 7 |<P>|<P>|<P>|<P>| . |<P>|<P>|<P>|
> +---+---+---+---+---+---+---+---+
> 6 | | . | | . | | . | | . |
> +---+---+---+---+---+---+---+---+
> 5 | . | | . | |<P>| | . | |
> +---+---+---+---+---+---+---+---+
> 4 | | . | | . |-P-| . | | . |
> +---+---+---+---+---+---+---+---+
> 3 | . | |-N-| | . | | . | |
> +---+---+---+---+---+---+---+---+
> 2 |-P-|-P-|-P-|-P-| |-P-|-P-|-P-|
> +---+---+---+---+---+---+---+---+
> 1 |-R-| |-B-|-Q-|-K-|-B-|-N-|-R-|
> +---+---+---+---+---+---+---+---+
> a b c d e f g h
>
>Black(2): go
> clearing hash tables
> time surplus 0.00 time limit 30.00 (+0.00) (30.00)
> depth time score variation (1)
> 9-> 17.05 0.11 2. ... Nf6 3. Nf3 Nc6 4. Bb5 Bb4 5.
> Bxc6 dxc6 6. d3 Bxc3+ 7. bxc3 Bg4 8.
> O-O Bxf3 9. Qxf3
> time=30.37 mat=0 n=2064832 fh=91% nps=67K
> ext-> chk=31617 cap=12845 1rep=1154 mate=28
> predicted=0 nodes=2064832 evals=1643243 50move=1
> endgame tablebase-> probes=0 hits=0
> hashing-> 33%(raw) 31%(depth) 85%(sat) 5201864%(pawn)
> hashing-> 0%(exact) 11%(lower) 0%(upper)
>
>Black(2): Nf6
> time used: 30.37
>
> +---+---+---+---+---+---+---+---+
> 8 |<R>|<N>|<B>|<Q>|<K>|<B>| |<R>|
> +---+---+---+---+---+---+---+---+
> 7 |<P>|<P>|<P>|<P>| . |<P>|<P>|<P>|
> +---+---+---+---+---+---+---+---+
> 6 | | . | | . | |<N>| | . |
> +---+---+---+---+---+---+---+---+
> 5 | . | | . | |<P>| | . | |
> +---+---+---+---+---+---+---+---+
> 4 | | . | | . |-P-| . | | . |
> +---+---+---+---+---+---+---+---+
> 3 | . | |-N-| | . | | . | |
> +---+---+---+---+---+---+---+---+
> 2 |-P-|-P-|-P-|-P-| |-P-|-P-|-P-|
> +---+---+---+---+---+---+---+---+
> 1 |-R-| |-B-|-Q-|-K-|-B-|-N-|-R-|
> +---+---+---+---+---+---+---+---+
> a b c d e f g h
>
>White(3): info
>Crafty version 20.1
>hash table memory = 3M bytes.
>pawn hash table memory = 1M bytes.
>60 moves/30 minutes 0 seconds primary time control
>30 moves/15 minutes 0 seconds secondary time control
>frequency (freq)..............1.00
>static evaluation (eval)......0.50
>learning (learn)..............1.00
>CAP (CAP score)...............0.70
>White(3): q
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