Author: Miguel A. Ballicora
Date: 15:40:22 02/06/02
Go up one level in this thread
On February 06, 2002 at 18:12:11, Dann Corbit wrote:
>[D]4k3/Q3p1Q1/1Q5B/Q1QN1NQ1/4QQ2/B2Q4/8/2R1KR2 w - - acd 4; acn 29; acs 0; bm
>Nc7# Nd6# Nf6# Q5g6# Q7g6# Qaa4# Qab5# Qaxe7# Qbb5# Qbb8# Qbc6# Qbg6# Qc8# Qcb5#
>Qcc6# Qcxe7# Qd8# Qdb5# Qea4# Qexe7# Qf8# Qfb8# Qg5xe7# Qg7xe7# Qg8# Qh5#; ce
>32766; dm 1; pv Nd6#;
>
>I have found that some programs crash, and others think for minutes on this mate
>in 1.
I did a perft 5 and a search. Gaviota has no problem to mate quickly
and accepts the position without a problem. I does not struggle to calculate
perft 5 but of course I do not know whether it is correct.
setboard 4k3/Q3p1Q1/1Q5B/Q1QN1NQ1/4QQ2/B2Q4/8/2R1KR2 w - - acd 4; acn 29; acs 0;
bm
d
+-----------------+
| . . . . k . . . |
| Q . . . x . Q . |
| . Q . . . . . B |
| Q . Q N . N Q . |
| . . . . Q Q . . |
| B . . Q . . . . |
| . . . . . . . . |
| . . R . K R . . |
+-----------------+
perft 5
depth 0: leaves: 1 accum: 1
depth 1: leaves: 131 accum: 132
depth 2: leaves: 200 accum: 332
depth 3: leaves: 26160 accum: 26492
depth 4: leaves: 15031 accum: 41523
depth 5: leaves: 1928938 accum: 1970461
seconds: 8.35 nps: 235926.83
sd 3
go
164 1: 0.0 +Mat_1 Qg7-g8
396 2: 0.0 +Mat_1 Qg7-g8
628 3: 0.0 +Mat_1 Qg7-g8
Ply: 3
Qg7-g8
Score: 125.38 (32098) Evals: 206 Time: 0.0s nps: 62800 Q/all: 0.00
nodes cutoffs missed tree_exp
path 628 210 0 1.00
quies 0 0 0 0.00
all 628 210 0 1.00
hashtable= attempts: 521 hits: 40.3% perfect: 0.0%
move g7g8
1-0 {Gaviota says White mates}
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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