Author: Art Basham
Date: 14:37:30 06/01/03
Go up one level in this thread
OK, thanks...However, Even on my slow machine, Rebel 10 finds it almost instantly at only 3 ply...! ------------------- On June 01, 2003 at 17:18:32, Kurt Utzinger wrote: >On June 01, 2003 at 17:08:46, Art Basham wrote: > >>Some of my engines are having trouble finding... >>1 Bf6...! >> >>[D]r2b1rk1/2q2p1p/p3b2Q/1pn3B1/4Pp2/P1NB4/1PP3PP/R4R1K w - - 0 1 >> >>The old CM4000 does find it at 7 ply in about 6 min. ...:-) >> >>Hiarcs found it right away at only 3 ply...! >> >>I see the new Rebel 12 has "problems" with this one too, >>but, believe it or not, it looks like the older versions of Rebel do better >>here... >> >>art > > > Hi Art > As you can see from the following analysis, > Rebel 12 Beta1 needs only 5 seconds to announce > mate in 6 moves with 1.Bf6 > Kurt > >Thinking.... > > +---+---+---+---+---+---+---+---+ Pos 1 - End 1 >8 | *R| | | *B| | *R| *K| | > +---+---+---+---+---+---+---+---+ 00:05:00 00:05:00 >7 | | | *Q| | | *p| | *p| > +---+---+---+---+---+---+---+---+ >6 | *p| | | | *B| | | Q | Time fixed: > +---+---+---+---+---+---+---+---+ Hash 28 Mb >5 | | *p| *N| | | | B | | Engine Beta 1 > +---+---+---+---+---+---+---+---+ Personality beta1.eng >4 | | | | | p | *p| | | anti-GM Off > +---+---+---+---+---+---+---+---+ Tactics Off >3 | p | | N | B | | | | | Bluff Chess Off > +---+---+---+---+---+---+---+---+ Style Normal >2 | | p | p | | | | p | p | Strength Strongest > +---+---+---+---+---+---+---+---+ Search Nullmove >1 | R | | | | | R | | K | > +---+---+---+---+---+---+---+---+ > a b c d e f g h > >r2b1rk1/2q2p1p/p3b2Q/1pn3B1/4Pp2/P1NB4/1PP3PP/R4R1K w - - > >[Event "?"] >[Site "?"] >[Date "??.??.????"] >[Round "?"] >[White "Player"] >[Black "Rebel 12"] >[Result "*"] >[WhiteElo "?"] >[BlackElo "?"] >[FEN "r2b1rk1/2q2p1p/p3b2Q/1pn3B1/4Pp2/P1NB4/1PP3PP/R4R1K w - - 0 1"] > >1.* > >00:00:00 1.00 2.20 1.Bxd8 Raxd8 2.Rxf4 Nxd3 3.cxd3 Rxd3 >00:00:00 1.03 2.98 1.Bxf4 >00:00:00 1.05 3.64 1.Rxf4 >00:00:00 2.00 2.56 1.Rxf4 Bxg5 2.Qxg5+ Kh8 3.Qf6+ Kg8 >00:00:00 2.03 2.70 1.Bxf4 Qe7 >00:00:00 2.05 2.73 1.a4 f6 2.Bxf4 >00:00:00 3.00 2.47 1.a4 Nxd3 2.cxd3 Qc5 3.Bxf4 >00:00:00 3.01 2.47 1.Bxf4 >00:00:00 3.01 4.23 1.Bxf4 Qe7 2.Be5 >00:00:00 4.00 3.22 1.Bxf4 Qe7 2.Be5 Qg5 >00:00:00 5.00 3.08 1.Bxf4 Qe7 2.Rf3 f6 3.Rg3 Kh8 >00:00:00 6.00 3.08 1.Bxf4 Qe7 2.Rf3 f6 3.Rg3 Kh8 >00:00:01 7.00 4.64 1.Bxf4 Qa7 2.Be3 Bb6 3.Qg5 Kh8 >00:00:01 8.00 4.45 1.Bxf4 Qb6 2.Bd6 Re8 3.Bxc5 Qxc5 4.e5 > f5 5.exf6 Ra7 6.f7 (1) > >00:00:03 9.00 5.04 1.Bxf4 Qd7 2.Bd6 Bb6 3.Bxc5 Bxc5 4.Qg5 > Kh8 5.Qxc5 (3) > >00:00:04 9.15 5.04 1.Bf6 >00:00:05 9.15 5.04 1.Bf6 >00:00:05 9.15 Mate in 6 moves 1.Bf6 Bxf6 2.e5 Bf5 3.Bxf5 Rfd8 4.Qxh7 > Kf8 5.exf6 Rac8 6.Qh8 (5) > > >Positions : 3.383.368 >Nodes per second : 676.673 > >Extensions (checks) : 0 (0%) >Extensions (captures) : 0 (0%) >Extensions (king safety) : 0 (0%) >Extensions (on depth) : 0 (0%) >Extensions (remaining) : 0 (0%) >Extensions (total) : 0 (0%) > >Hash Table : 65.534 55.447 (19%) >Average depth : 10 >Deepest depth : 39
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