Author: David Rasmussen
Date: 03:58:19 01/03/02
Go up one level in this thread
On January 03, 2002 at 01:05:14, Jouni Uski wrote:
>[D]k7/P7/P7/P7/P7/P7/P7/R3K3 w Q - 0 1
>
>Mate in 8
>
>I tried this at home with Tiger14 and Fritz7 and Shredder5.32. None of them has
>any idea about mate in 8. Then I tried with Mate2.1, but no solution under 30
>minutes. What's the problem? Only Yace gives CORRECT mate in few seconds. Is
>this null move problem?
>
>Jouni
Crappy version of Chezzz:
WHITE(1): go
I'm thinking...
time nodes depth score pv
00:00:00.13 55kn 08/14/14 ---------------------------------------------------
00:00:00.21 87kn 09/16/16 +10.595 1. Rd1 Kxa7 2. Rd6 Ka8
3. Rd7 Kb8 4. Ke2 Kc8
5. a7
00:00:00.36 146kn 09/16/16 ---------------------------------------------------
00:00:00.48 199kn 10/18/18 +10.645 1. Rd1 Kxa7 2. Rd6 Ka8
3. Rd7 Kb8 4. Kf2 Ka8
5. Ke2
00:00:00.69 332kn 10/18/18 ---------------------------------------------------
00:00:00.89 462kn 11/18/18 +10.745 1. Rd1 Kxa7 2. Rd6 Ka8
3. Rd7 Kb8 4. Kf2 Ka8
5. Ke3 Kb8 6. a7+ Ka8
00:00:01.30 735kn 11/19/19 ---------------------------------------------------
00:00:01.94 1159kn 12/20/20 +10.845 1. Rd1 Kxa7 2. Rd6 Ka8
3. Rd7 Kb8 4. Kf2 Ka8
5. Ke3 Kb8 6. a7+ Ka8
7. Ke4
00:00:02.47 1520kn 12/20/20 ---------------------------------------------------
00:00:04.36 2736kn 13/20/20 +10.795 1. Rd1 Kxa7 2. Rd6 Ka8
3. Rd7 Kb8 4. Kf2 Ka8
5. Ke3 Kb8 6. Ke4 Kc8
7. a7
00:00:04.48 2810kn 13/20/20 +11.178 1. O-O-O!
00:00:05.44 3437kn 13/20/20 +12.525 1. O-O-O Kxa7 2. Kb1 Kxa6
3. Rd6+ Kb7 4. a6+ Ka7
5. Kb2 Kb8 6. Rd7
00:00:06.29 3983kn 13/22/22 ---------------------------------------------------
00:00:06.72 4257kn 14/22/22 +12.858 1. O-O-O!
00:00:11.68 7342kn 14/22/22 +MAT17 1. O-O-O Kxa7 2. Kc2 Kb8
3. Rd7 Ka8 4. Rd8+ Ka7
00:00:16.27 10Mn 14/23/23 ---------------------------------------------------
00:00:25.29 15Mn 15/24/24 +MAT15 1. O-O-O Kxa7 2. Rd8 Kxa6
3. Rd7 Kxa5 4. Rd6 Kxa4
5. Rd5 Kxa3 6. Rd4 Kxa2
7. Rd3 Ka1 8. Ra3#
00:00:39.55 24Mn 15/25/25 ---------------------------------------------------
Time used: 00:00:39.55
nps: 618190 nodes: 24449424 Q-nodes: 408305 (1%)
move order: 99%
hash probes: 11558679 hash hits: 7769302 (67%) hash usage: 99%
hash collision: 0
pawn hash probes: 12890745 pawn hash hits: 12890688 (99%)
1. O-O-O
BLACK(1):
So it finds the mate in 26 seconds. Is it the correct mate?
/David
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.