Author: Dann Corbit
Date: 15:17:20 09/20/99
Go up one level in this thread
On September 20, 1999 at 11:53:07, Shep wrote:
>On September 20, 1999 at 11:05:05, Andreas Stabel wrote:
>
>>1. no promoted pieces, without promotion moves: 109 white moves (W.Cross 1967)
>>2. no promoted pieces : 144 white moves (J.Ban 1960)
>>3. with promoted pieces : 218 white moves (Dickins 1968)
>>4. with all 32 pieces : 99 white moves (HH.Cross 1946)
>>
>>1. 5k2/2K5/3N1B1P/P1NB4/6Q1/4R3/P1PP1P1P/1R6 w - - 0 1
>>2. n1r1r1b1/1P1P1P1P/1Q6/3NBNK1/R7/4p1p1/3PBPkP/2R5 w - - 0 1
>>3. 3Q4/1Q4Q1/4Q3/2Q4R/Q4Q2/3Q4/1Q4Rp/1K1BBNNk w - - 0 1
>>4. q2Q3r/n6R/kpB1N1K1/p1p1Bppp/1PN3P1/1n1pp1b1/P1PPPP1P/r5Rb w - - 0 1
>>
>>Theese positions may break several chess engines :)
>
>#3 broke every one I tried about 1 year ago: Crafty, MChess, Fritz, ... :)
Crafty zips right through them now. I suggest that 256 is probably a reasonable
limit for holding possible moves. It fits in an unsigned char for storing the
count. If we have some enormous array of objects that is a function of the move
count, it might be wise to try to trim it though.
pondering enabled.
EGTB cache memory = 16M bytes.
hash table memory = 48M bytes.
pawn hash table memory = 8M bytes.
play best book line after search.
EGTB access enabled
using tbpath=e:/crafty/release/tb,F:/KBP
4 piece tablebase files found
1386kb of RAM used for TB indices and decompression tables
PFGA: EPD record: 1
middle-game phase
clearing hash tables
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
1 0.00 ++ 1. Ne6#!!
1 0.00 Mate 1. Ne6#
1-> 0.01 Mate 1. Ne6#
2 0.01 Mate 1. Ne6#
2-> 0.02 Mate 1. Ne6#
3 0.03 Mate 1. Ne6#
3-> 0.06 Mate 1. Ne6#
4 0.06 Mate 1. Ne6#
White(1): exit
4-> 0.44 Mate 1. Ne6#
time=0.44 cpu=97% mat=38 n=112903 fh=100% nps=256597
ext-> checks=5752 recaps=0 pawns=422 1rep=811 thrt:0
predicted=0 nodes=112903 evals=9
endgame tablebase-> probes done=0 successful=0
PFGA: EPD record: 2
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
2 0.09 Mat03 1. Nh4+ Kxh2 2. Bxg3+ Kh3 3. Nf4#
2 0.10 Mat02 1. Nf4+ Kxf2 2. Qxe3#
2-> 0.10 Mat02 1. Nf4+ Kxf2 2. Qxe3#
3 0.11 Mat02 1. Nf4+ Kxf2 2. Qxe3#
3-> 0.20 Mat02 1. Nf4+ Kxf2 2. Qxe3#
4 0.22 Mat02 1. Nf4+ Kxf2 2. Qxe3#
4-> 1.06 Mat02 1. Nf4+ Kxf2 2. Qxe3#
time=1.06 cpu=100% mat=20 n=191358 fh=99% nps=180526
ext-> checks=12871 recaps=515 pawns=152 1rep=1774 thrt:0
predicted=0 nodes=191358 evals=4604
endgame tablebase-> probes done=0 successful=0
PFGA: EPD record: 3
clearing hash tables
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
1 0.00 ++ 1. Rhxh2#!!
1 0.00 Mate 1. Rhxh2#
1-> 0.01 Mate 1. Rhxh2#
2 0.02 Mate 1. Rhxh2#
2-> 0.03 Mate 1. Rhxh2#
3 0.03 Mate 1. Rhxh2#
3-> 0.16 Mate 1. Rhxh2#
4 0.16 Mate 1. Rhxh2#
4-> 2.10 Mate 1. Rhxh2#
time=2.10 cpu=99% mat=102 n=475277 fh=100% nps=225249
ext-> checks=24280 recaps=170 pawns=0 1rep=4454 thrt:0
predicted=0 nodes=475277 evals=1
endgame tablebase-> probes done=0 successful=0
PFGA: EPD record: 4
clearing hash tables
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
1 2.27 1.78 1. Rxh8 Qxd8 2. Rxd8 Rxg1 3. Bxh1 Bxe5
4. Nxe5 exf2
1 3.15 ++ 1. Bxa8!!
1 4.35 3.72 1. Bxa8 Rxd8 2. Bxa1
1 8.04 4.09 1. Qxa8 Rxa8 2. Bxa1 Bxc6 3. fxg3
1 8.04 ++ 1. Qxb6#!!
1 8.05 Mate 1. Qxb6#
1-> 8.10 Mate 1. Qxb6#
2 8.10 Mate 1. Qxb6#
2-> 8.16 Mate 1. Qxb6#
3 8.16 Mate 1. Qxb6#
3-> 8.30 Mate 1. Qxb6#
4 8.30 Mate 1. Qxb6#
4-> 8.80 Mate 1. Qxb6#
time=8.80 cpu=100% mat=0 n=1071524 fh=100% nps=121902
ext-> checks=5546 recaps=216 pawns=11 1rep=648 thrt:0
predicted=0 nodes=1071524 evals=741557
endgame tablebase-> probes done=0 successful=0
Crafty v16.18
White(1): quit
execution complete.
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