Author: Mike Byrne
Date: 11:17:55 07/06/02
Go up one level in this thread
oops I meant to say mate in 13 - it is a "mate in 12", my beta jst happens to see the mate in 13 first On July 06, 2002 at 14:16:51, Mike Byrne wrote: >On July 06, 2002 at 09:47:59, Art Basham wrote: > >>Qh6 mates in 12..! >> >>[D]1b4k1/r4p2/5Pp1/8/8/8/8/2Q4K w - - >> >>CM5500 takes 8 ply to find it. >> >>Fritz7 says that Qc8+ also mates! > >My latest modified crafty beta (unreleased) does see the mate in 12 in several >seconds > >White(1): 1b4k1/r4p2/5Pp1/8/8/8/8/2Q4K w - - > > +---+---+---+---+---+---+---+---+ > 8 | | *B| | | | | *K| | > +---+---+---+---+---+---+---+---+ > 7 | *R| | | | | *P| | | > +---+---+---+---+---+---+---+---+ > 6 | | | | | | P | *P| | > +---+---+---+---+---+---+---+---+ > 5 | | | | | | | | | > +---+---+---+---+---+---+---+---+ > 4 | | | | | | | | | > +---+---+---+---+---+---+---+---+ > 3 | | | | | | | | | > +---+---+---+---+---+---+---+---+ > 2 | | | | | | | | | > +---+---+---+---+---+---+---+---+ > 1 | | | Q | | | | | K | > +---+---+---+---+---+---+---+---+ > a b c d e f g h > >White(1): d >White(1): go >end-game phase > clearing hash tables > time surplus 0.00 time limit 10:00 (10:00) > nss depth time score variation (1) >starting thread 1 > 10 0.31 7.06 1. Qc8+ Kh7 2. Qf8 Ra1+ 3. Kg2 Ra2+ > 4. Kf3 Ra3+ 5. Qxa3 Be5 6. Qe7 Bxf6 > 7. Qxf6 Kg8 8. Kg4 Kf8 > 10-> 0.33 7.06 1. Qc8+ Kh7 2. Qf8 Ra1+ 3. Kg2 Ra2+ > 4. Kf3 Ra3+ 5. Qxa3 Be5 6. Qe7 Bxf6 > 7. Qxf6 Kg8 8. Kg4 Kf8 > 11 0.74 7.41 1. Qc8+ Kh7 2. Qf8 Ra1+ 3. Kg2 Ra2+ > 4. Kf3 Ra3+ 5. Ke4 Ra4+ 6. Kd5 Ra5+ > 7. Kc4 Ra4+ 8. Kb3 Ra3+ 9. Kxa3 Bd6+ > 10. Qxd6 g5 11. Qd3+ Kh6 12. Kb3 > 11-> 0.75 7.41 1. Qc8+ Kh7 2. Qf8 Ra1+ 3. Kg2 Ra2+ > 4. Kf3 Ra3+ 5. Ke4 Ra4+ 6. Kd5 Ra5+ > 7. Kc4 Ra4+ 8. Kb3 Ra3+ 9. Kxa3 Bd6+ > 10. Qxd6 g5 11. Qd3+ Kh6 12. Kb3 > 12 1.20 ++ 1. Qc8+!! > 12 7.27 Mat13 1. Qc8+ Kh7 2. Qf8 Ra1+ 3. Kg2 Ra2+ > 4. Kf3 Ra3+ 5. Ke4 Ra4+ 6. Kd5 Ra5+ > 7. Kc4 Ra4+ 8. Kb5 Rb4+ 9. Kc6 Rc4+ > 10. Kd5 Rd4+ 11. Kxd4 Be5+ 12. Kxe5 > g5 13. Qg7# <HT> > 12-> 7.28 Mat13 1. Qc8+ Kh7 2. Qf8 Ra1+ 3. Kg2 Ra2+ > 4. Kf3 Ra3+ 5. Ke4 Ra4+ 6. Kd5 Ra5+ > 7. Kc4 Ra4+ 8. Kb5 Rb4+ 9. Kc6 Rc4+ > 10. Kd5 Rd4+ 11. Kxd4 Be5+ 12. Kxe5 > g5 13. Qg7# <HT> > >solves 286/300 wac300 in one second >test results summary: > >total positions searched.......... 300 >number right...................... 286 >number wrong...................... 14 >percentage right.................. 95 >percentage wrong.................. 4 >total nodes searched.............. 41601173 >average search depth.............. 4.5 >nodes per second.................. 1103772 > >test results summary: > > >and 299/300 (!wac.230) in 10 seconds >nps were at 1.3 M >total positions searched.......... 300 >number right...................... 299 >number wrong...................... 1 >percentage right.................. 99 >percentage wrong.................. 0 >total nodes searched.............. 146766154 >average search depth.............. 4.6 >nodes per second.................. 1298011
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