Author: John Merlino
Date: 14:51:22 10/04/04
Go up one level in this thread
On October 04, 2004 at 16:51:50, Eelco de Groot wrote: > >[Event "Wch-Comp-11 Maastricht"] >[Site "Maastricht"] >[Date "19/8/2001"] >[Round "2"] >[White "Ferret 2xAMD 1.2"] >[Black "Gandalf 5.0"] >[Result "1-0"] > >1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 >O-O 9. h3 Bb7 >10. d4 Re8 11. Nbd2 Bf8 12. a4 h6 13. Bc2 exd4 14. cxd4 Nb4 15. Bb1 g6 16. Ra3 >Bg7 17. Nh2 >c5 18. d5 Nd7 19. Ndf3 h5 20. Nf1 bxa4 21. Qxa4 a5 22. Ne3 Ba6 23. Qd1 c4 24. >Nd2 Ne5 25. Rf1 >Qb6 26. Kh2 c3 27. bxc3 Bxf1 28. Qxf1 Na6 29. Rb3 Qc7 30. c4 Nb4 31. Qd1 Nd7 32. >Nef1 >Nc5 33. Rf3 a4 34. Kg1 Reb8 35. Rg3 Qe7 36. Ba3 Be5 37. Re3 Bf4 38. Rf3 Qe5 39. >h4 Bh6 >40. Ne3 Nb3 41. Ndf1 Bxe3 42. Nxe3 Qa1 > >[D]rr4k1/5p2/3p2p1/3P3p/pnP1P2P/Bn2NR2/5PP1/qB1Q2K1 w - - 1 1 > >43. e5 Qxa3 > >[D]rr4k1/5p2/3p2p1/3PP2p/pnP4P/qn2NR2/5PP1/1B1Q2K1 w - - 0 1 > > >44. Rxf7 Kxf7 45. Qf3+ Kg8 46. Qf6 > >Hello, I am curious if there are programs that can find Ferret's 43.e5! in the >first diagram, in reasonable time? You probably have to have some sort of >singular extensions to play 43.e5! even if then you then don't see 44.Rxf7 yet. > >Rebel 12 could find e5 with its singular extensions enabled, but the searchtree >in Rebel 12 would often grow out of control at ply>12 . Programs with singular >extensions, like Bruce Moreland's Ferret have the advantage here, but is it >findable with other extensions? > >My own current settings for Pro Deo do play 44.Rxf7! but only after 16 minutes, >lots of nondefault extensions > >[Pruning = MISC_30]* extend singular checks , [Extensions (remaining)= 15] -not >sure this last one is right as I remember these remaining Rebel extensions were >bitsettings, not normal settings?- > >and big minusscore on my Celeron 500MHz, 43.e4-e5 I can't get yet. (43.Ba3xb4 >and 43.Ne3-f5 are other choices but I'm afraid these only lead to a lost game). > >Pro Deo 1.0 at move 44, custom settings: >00:16:44.8 -3,52 12 162748792 Rxf7 Kxf7 Qf3+ Kg8 Qe4 Qc1+ Kh2 Qxb1 Qxb1 >00:16:44 12.15 -3.52 44.Rxf7 Kxf7 45.Qf3 Kg8 46.Qe4 Qc1 47.Kh2 Qxb1 >48.Qxb1 > >Is Ferret the only one to find the winning continuation quickly ? > >Regards, Eelco CM9_SKR on an AMD 2500 needs more than six minutes to find 42.e5. But it also thinks the proper follow-up is 42...Nd4, rather than accepting the sacrifice: Time Depth Score Positions Moves 0:00 1/3 0.03 1270 1.Bxb4 Nd4 2.Qe1 Nxf3+ 3.gxf3 0:00 1/4 -0.22 2863 1.Bxb4 Nd4 2.Nc2 Nxc2 0:00 1/5 -0.56 10164 1.Bxb4 Nd4 2.Qe1 Qb2 3.Nc2 Nxc2 0:00 1/6 -0.56 23004 1.Bxb4 Nd4 2.Qe1 Qb2 3.Nc2 Nxc2 0:02 1/7 -1.28 73513 1.Bxb4 Nd4 2.Qe1 Qb2 3.Nc2 Nxc2 4.Bxc2 Rxb4 0:03 1/8 -1.66 152123 1.Bxb4 Nd4 2.Qe1 Qb2 3.Nc2 Nxc2 4.Bxc2 Rxb4 5.Bd3 Rb3 0:03 1/9 -1.66 376973 1.Bxb4 Nd4 2.Qe1 Qb2 3.Nc2 Nxc2 4.Bxc2 Rxb4 5.Bd3 Rb3 0:06 1/10 -1.57 1095570 1.Bxb4 Nd4 2.Qe1 Qb2 3.Nc2 Nxc2 4.Bxc2 Rxb4 5.Rc3 a3 6.c5 0:12 1/11 -2.19 2762031 1.Bxb4 Nd4 2.Qe1 a3 3.Nc2 Nxc2 4.Bxc2 Qxe1+ 5.Bxe1 a2 6.Bc3 Rb1+ 7.Kh2 Rc1 8.e5 Rxc2 0:28 1/12 -2.19 7190827 1.Bxb4 Nd4 2.Qe1 a3 3.Nc2 Nxc2 4.Bxc2 Qxe1+ 5.Bxe1 a2 6.Bc3 Rb1+ 7.Kh2 Rc1 8.e5 Rxc2 1:18 1/13 -2.69 21274525 1.Bxb4 Nd4 2.Qe1 a3 3.Nc2 Nxc2 4.Bxc2 Qxe1+ 5.Bxe1 a2 6.Bc3 Rb1+ 7.Kh2 Rc1 8.e5 Rxc2 9.Ba1 dxe5 6:31 1/13 -2.43 104002045 1.e5 Nd4 2.Rxf7 Ne2+ 3.Kh2 Qxe5+ 4.g3 Kxf7 5.Qxe2 Na6 6.Bc2 Nc5 7.Bxc5 dxc5 8.Qd3 Qf6 9.Qe4 Qxf2+ 10.Ng2 After forcing 42.e5 Qxa3, The King needs just under one minute to find 43.Rxf7. jm
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