Author: John Merlino
Date: 07:56:24 08/31/01
Go up one level in this thread
On August 30, 2001 at 09:36:26, Uri Blass wrote: >On August 30, 2001 at 07:45:34, Kim Roper Jensen wrote: > >>Hi >> >>If my memory(heavily fragmented) serves me well there was some games, where the >>DB played against DT, and in one of them DB "announced" mate in 18, a very >>complicated position where the mate consisted of quiet moves and some >>counterchecks. >> >>Are there anyone that have this position ?? Or is my memory corrupted ??? :) >> >>With regards > >I know of no public games between DB and DT. > >I had a mate in 18 against abir har aven >when no commercial program can see the mate and I found the mate only >by going forward and backward with chessmaster >that is the best in finding mates. > >chessmaster6000(ss=10)could not find the mate in a few hours >on PIII850 and it means that probably no program can do it >in a reasonable time. > >I posted the position some weeks ago and yace also could see the mate >after going forward and backward but not from the root position. > >Uri This is very strange, because Chessmaster 8000 (default personality) on my PIII-733, has no problem and finds the mate in 18 in 2 seconds (although, for some reason, it only reports the first 16 of the moves....hmmm.... I think I remember Johan saying something about a PV having a maximum number of plies and now I believe it is 31): Time Depth Score Positions Moves 0:00 1/4 0.00 12278 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+ Kh8 5. Bg5+ Kg8 6. Qg6+ Kh8 7. Qh5+ 0:00 2/5 0.00 65310 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+ Kh8 5. Bg5+ Kg8 6. Qg6+ Kh8 7. Qh5+ 0:02 2/6 Mate18 184360 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+ Kh8 5. Bg5+ Kg7 6. Qh6+ Kf7 7. Qf6+ Kg8 8. Qg6+ Kh8 9. Bf6+ Rxf6 10. exf6 Qxe1+ 11. Kxe1 Nc2+ 12. Kf1 Ne3+ 13. fxe3 Rd7 14. Qe8+ Kh7 15. Qxd7+ Ne7 16. Qxe7+ 0:04 3/7 Mate18 562164 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+ Kh8 5. Bg5+ Kg7 6. Qh6+ Kf7 7. Qf6+ Kg8 8. Qg6+ Kh8 9. Bf6+ Rxf6 10. exf6 Qxe1+ 11. Kxe1 Nc2+ 12. Kf1 Ne3+ 13. fxe3 Rd7 14. Qe8+ Kh7 15. Qxd7+ Ne7 16. Qxe7+ 0:10 3/8 Mate18 1391527 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+ Kh8 5. Bg5+ Kg7 6. Qh6+ Kf7 7. Qf6+ Kg8 8. Qg6+ Kh8 9. Bf6+ Rxf6 10. exf6 Qxe1+ 11. Kxe1 Nc2+ 12. Kf1 Ne3+ 13. fxe3 Rd7 14. Qe8+ Kh7 15. Qxd7+ Ne7 16. Qxe7+ jm
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