Author: Dieter Buerssner
Date: 15:55:40 11/11/02
Go up one level in this thread
Manfred, you are using an UCI interface. You could try to set extensions to
"aggressive". It can be helpful in this and other mate finding positions. Non
UCI-users of Yace can type (or put it to yace.ini):
irec 1
irep 1
Then Yace will find it rather fast (Yace 0.99.56, P4, 2.53 Ghz):
white ( 1): setb r3r1k1/1p3pp1/2p2n1p/p1Ppbb1q/6n1/PQN1P1PN/1P1B1PKP/R2BR3 b - -
0 23
black (23): hash 30M
hash size wanted 30000000
entries 2499999 size 29999988 size_wanted 30000000 tts3 833332
black (23): ana
1340396 1.628 2.30 6. 23...Nxe3+ 24. fxe3 Qxh3+ 25. Kg1 d4 26. Na4
Be4 27. Re2 d3 28. Rf2 {80}
2990068 3.546 2.68 7t 23...Nxe3+ 24. fxe3 Qxh3+ 25. Kg1 d4 26. Nb1
Be4 27. Re2 Bf3 28. Rf2 a4 29. Qc2 {80}
3498395 4.150 2.69 7t+ 23...Qxh3+ 24. Kxh3 Nxe3+ 25. g4 Nfxg4 26. f4
Bxf4 27. Nxd5 Nxh2+ 28. Bg4 Bxg4+ 29. Kh4 Nxd5
30. Re2 {269}
3504418 4.159 2.70 7++ 23...Qxh3+ 24. Kxh3 Nxe3+ 25. g4 Nfxg4 26. f4
Bxf4 27. Qxd5 cxd5 28. Bxe3 Nxe3+ 29. Kh4 {510}
3642309 4.382 3.70 7++ 23...Qxh3+ 24. Kxh3 Nxe3+ 25. g4 Nfxg4 26. f4
Bxf4 27. Qxd5 cxd5 28. Bxe3 Nxe3+ 29. Kh4 {510}
3888041 4.708 8.70 7++ 23...Qxh3+ 24. Kxh3 Nxe3+ 25. g4 Nfxg4 26. f4
Bxf4 27. Qxd5 cxd5 28. c6 Nxh2+ 29. Kh4 bxc6
{660}
5119327 5.749 Mat12 7t 23...Qxh3+ 24. Kxh3 Nxe3+ 25. g4 Nfxg4 26. Rg1
Nxf2+ 27. Kh4 g5+ 28. Rxg5+ hxg5+ 29. Kxg5
Bxh2H {-1}
5844918 6.365 Mat12 7. 23...Qxh3+ 24. Kxh3 Nxe3+ 25. g4 Nfxg4 26. Rg1
Nxf2+ 27. Kh4 g5+ 28. Rxg5+ hxg5+ 29. Kxg5 Bxh2
{-1}
10771164 10.556 Mat12 8t 23...Qxh3+ 24. Kxh3 Nxe3+ 25. g4 Nfxg4 26. Rg1
Nxf2+ 27. Kh4 g5+ 28. Rxg5+ hxg5+ 29. Kxg5 Nh3+
30. Kh4 Kg7 31. Bxe3 Rh8+ 32. Bh5 Rxh5+ 33.
Kxh5 Rh8+ 34. Bh6+ Rxh6# {-221}
13656724 12.812 Mat12 8. 23...Qxh3+ 24. Kxh3 Nxe3+ 25. g4 Nfxg4 26. Rg1
Nxf2+ 27. Kh4 g5+ 28. Rxg5+ hxg5+ 29. Kxg5 Nh3+
30. Kh4 Kg7 31. Bxe3 Rh8+ 32. Bh5 Rxh5+ 33.
Kxh5 Rh8+ 34. Bh6+ Rxh6# {-221}
This problem is rather suited to the extensions used in Yace, because the mate
is not from any (intermediate - in the search tree) position with a big material
advantage.
Cheers,
Dieter
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