Author: Mike Byrne
Date: 23:21:21 06/30/02
Go up one level in this thread
On June 25, 2002 at 19:44:39, Art Basham wrote:
>After 3 or 4 min, In this position, the Fritz 7 program ann. a mate in 20...!
>Beginning with QXN, etc.
>
[D]4r1k1/p1qr1p2/2pb1Bp1/1p5p/3P1n1R/1B3P2/PP3PK1/2Q4R w - -
>
>1. QXN also make a good test move for engines to find...
while fiddling with my modified crafty , I tested this oldy but goody and was
stunned at the result - it sees the winning move in less < 1 second
"pc" is a pawn capture extension I'm fiddling with at the moment - extending on
pawn captures that are "near" the King.
White(1): 4r1k1/p1qr1p2/2pb1Bp1/1p5p/3P1n1R/1B3P2/PP3PK1/2Q4R w
+---+---+---+---+---+---+---+---+
8 | | | | | *R| | *K| |
+---+---+---+---+---+---+---+---+
7 | *P| | *Q| *R| | *P| | |
+---+---+---+---+---+---+---+---+
6 | | | *P| *B| | B | *P| |
+---+---+---+---+---+---+---+---+
5 | | *P| | | | | | *P|
+---+---+---+---+---+---+---+---+
4 | | | | P | | *N| | R |
+---+---+---+---+---+---+---+---+
3 | | B | | | | P | | |
+---+---+---+---+---+---+---+---+
2 | P | P | | | | P | K | |
+---+---+---+---+---+---+---+---+
1 | | | Q | | | | | R |
+---+---+---+---+---+---+---+---+
a b c d e f g h
White(1): sd 7
search depth set to 7.
White(1): go
time surplus 0.00 time limit 166:39 (166:39)
nss depth time score variation (1)
6 0.34 ++ 1. Qxf4!!
6 1.30 7.71 1. Qxf4 Re5 2. dxe5 Be7 3. Bxf7+ Kxf7
4. Bxe7+ Kxe7 5. Qf6+ Ke8 6. Qxg6+
6-> 1.30 7.71 1. Qxf4 Re5 2. dxe5 Be7 3. Bxf7+ Kxf7
4. Bxe7+ Kxe7 5. Qf6+ Ke8 6. Qxg6+
7 1.89 ++ 1. Qxf4!!
7 3.67 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
4. Rxh6 Qh2+ 5. Kxh2 Kf8 6. Rh8#
7-> 3.67 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
4. Rxh6 Qh2+ 5. Kxh2 Kf8 6. Rh8#
time=3.67 cpu=396% mat=-1 n=4451629 fh=85% nps=1212k
ext-> chk=414589 cap=8226 pp=1371 1rep=48506 mate=43513 pc=128
predicted=0 nodes=4451629 evals=410099
endgame tablebase-> probes done=0 successful=0
SMP-> split=67 stop=9 data=5/32 cpu=14.54 elap=3.67
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