Author: Ernst Walet
Date: 00:36:50 02/09/02
Go up one level in this thread
I tested this position with FP on and afterwards with fp off. It doesn't really matter to the time needed to find b4 though. Ernst. New game 4rnk1/pp1q1ppp/2p4r/3p4/3P4/4P1NP/PPQ2PP1/R3R1K1 w - - 0 1 Analysis by Fritz 7: 1.Rac1 Qe6 2.b4 g6 3.e4 Rh4 4.f3 Rd8 = (0.19) Depth: 8/20 00:00:00 167kN 1.Rac1 Qe6 2.b4 g6 3.Qc5 Ra8 4.e4 dxe4 5.Nxe4 Qxa2 = (0.22) Depth: 9/19 00:00:00 219kN 1.Rac1 Rg6 2.a3 Qd6 3.Qc5 Qxc5 4.dxc5 Nd7 5.b4 Kf8 6.Rcd1 = (0.16) Depth: 10/25 00:00:01 746kN 1.Rac1 Ne6 2.Qf5 Qe7 3.a3 Qh4 4.b4 Rf6 5.Qh5 Qxh5 6.Nxh5 = (0.16) Depth: 11/26 00:00:03 2017kN 1.Rac1 Ne6 2.Qf5 Qe7 3.a3 Rf6 4.Qc2 Ng5 5.Qc5 Qxc5 6.Rxc5 Ne4 7.Nxe4 dxe4 = (0.09) Depth: 12/27 00:00:07 4114kN 1.b4! = (0.13) Depth: 12/27 00:00:10 5940kN 1.b4 Ne6 2.Rab1 Ng5 3.Qf5 Qxf5 4.Nxf5 Rg6 5.Ng3 h5 6.Kf1 Ne4 7.Nxe4 Rxe4 8.Rec1 = (0.09) Depth: 13/24 00:00:13 7937kN 1.a4! = (0.13) Depth: 13/27 00:00:18 11549kN 1.a4 Ne6 2.a5 Ng5 3.a6 b6 4.Rec1 Ne4 5.Nxe4 dxe4 6.Ra3 Qf5 7.Rc3 Rc8 8.Kh2 = (0.19) Depth: 14/32 00:01:06 40801kN 1.a4 Ne6 2.a5 Rg6 3.b4 Ng5 4.Qc5 a6 5.Rac1 Ne4 6.Nxe4 dxe4 7.Qh5 Rh6 8.Qg4 = (0.09) Depth: 15/33 00:01:25 53512kN 1.a4 Ne6 2.a5 Rg6 3.a6 b6 4.Qf5 Qd6 5.Rac1 Qb4 6.Red1 Rf6 7.Qc2 Nc7 8.Qe2 = (0.09) Depth: 16/36 00:03:05 117198kN 1.a4 Ne6 2.a5 Rg6 3.h4 Rh6 4.Rec1 a6 5.Nf5 Rf6 6.Ra3 Nc7 7.Ng3 Qg4 8.Rb3 = (0.06) Depth: 17/38 00:06:02 233447kN 1.Rac1! = (0.09) Depth: 17/38 00:07:36 296926kN 1.Rac1 Ne6 2.b4 Rg6 3.Qf5 Rf6 4.Qh5 Rg6 5.a3 Ng5 6.Qd1 Rh6 = (-0.03) Depth: 18/41 00:19:37 765567kN 1.a4! = (0.00) Depth: 18/41 00:21:19 832605kN 1.a4 Ne6 2.a5 Ng5 3.Qf5 Qxf5 4.Nxf5 Rg6 5.Ng3 h5 6.Kf1 h4 7.Nf5 Rf6 = (0.00) Depth: 19/42 00:51:04 2001251kN 1.b4! = (0.03) Depth: 19/42 01:17:15 3043867kN 1.b4 Ne6 2.Rec1 Rg6 3.a4 a6 4.Qf5 Rg5 5.Qf3 Rg6 6.Qh5 Ng5 7.b5 cxb5 8.axb5 = (0.06) Depth: 20/46 02:36:56 6153427kN 1.b4 Ne6 2.Reb1 Rg6 3.b5 Ng5 4.bxc6 Rxc6 5.Qf5 Qxf5 6.Nxf5 g6 7.Ng3 b6 8.Rb5 = (0.06) Depth: 21/48 05:36:28 13386470kN (Celeron 1.2GHz, 832MB hash, 3, 4 & 5 piece EGTB's 08.02.2002) New game 4rnk1/pp1q1ppp/2p4r/3p4/3P4/4P1NP/PPQ2PP1/R3R1K1 w - - 0 1 Analysis by Fritz 7: (FP off) 1.Rac1 Qe6 2.b4 g6 3.e4 Rh4 4.f3 Rd8 = (0.19) Depth: 8/20 00:00:00 170kN 1.Rac1 Qe6 2.b4 g6 3.Qc5 Ra8 4.e4 dxe4 5.Nxe4 Qxa2 = (0.22) Depth: 9/19 00:00:00 222kN 1.Rac1 Rg6 2.a3 Qd6 3.Qc5 Qxc5 4.dxc5 Nd7 5.b4 Kf8 6.Rcd1 = (0.16) Depth: 10/25 00:00:01 763kN 1.Rac1 Ne6 2.b4 Rf6 3.Qa4 a6 4.Qd1 Qe7 5.a3 Rg6 6.Qh5 = (0.19) Depth: 11/25 00:00:03 1903kN 1.Rac1 Ne6 2.b4 Ng5 3.Qf5 Qxf5 4.Nxf5 Rf6 5.Ng3 Ne4 6.Nxe4 dxe4 7.Red1 Kf8 = (0.13) Depth: 12/26 00:00:05 3110kN 1.Rac1 Ne6 2.b4 Ng5 3.Qf5 Qxf5 4.Nxf5 Rf6 5.Ng3 Kf8 6.b5 Ne4 7.Nxe4 dxe4 8.bxc6 = (0.09) Depth: 13/28 00:00:12 7155kN 1.Rac1 Ne6 2.b4 Ng5 3.Qf5 Qxf5 4.Nxf5 Rf6 5.Ng3 Kf8 6.b5 Ne4 7.Nxe4 dxe4 8.bxc6 = (0.13) Depth: 14/30 00:00:30 18057kN 1.Rac1 Ne6 2.b4 Ng5 3.Qf5 Qxf5 4.Nxf5 Rf6 5.Ng3 Kf8 6.a4 Ne4 7.Nxe4 dxe4 8.Red1 = (0.06) Depth: 15/30 00:00:54 33204kN 1.Rac1 Ne6 2.a4 Rg6 3.a5 a6 4.Qf5 Qd6 5.Ra1 Qb4 6.Qd3 Ng5 7.Rec1 Ne4 8.Nxe4 = (0.06) Depth: 16/36 00:03:45 138010kN 1.a4! = (0.09) Depth: 16/43 00:06:21 234288kN 1.a4 Ne6 2.a5 a6 3.b4 Ng5 4.Qf5 Qxf5 5.Nxf5 Rhe6 6.Ng3 Ne4 7.Nxe4 Rxe4 8.Kf1 = (0.09) Depth: 17/39 00:08:31 314542kN 1.a4 Ne6 2.a5 Rg6 3.h4 Rh6 4.Rec1 a6 5.Nf5 Rf6 6.Re1 Nf8 7.Ng3 Qg4 8.Qb3 = (0.03) Depth: 18/40 00:15:35 574865kN 1.a4 Ne6 2.a5 Rg6 3.h4 Rh6 4.Rec1 a6 5.Nf5 Rf6 6.b4 Nc7 7.Ng3 = (0.03) Depth: 19/42 00:48:58 1815903kN 1.b4! = (0.06) Depth: 19/43 01:08:30 2549207kN 1.b4 Ne6 2.Rec1 Rg6 3.a4 a6 4.Qf5 Rg5 5.Qb1 Nc7 6.Qc2 Qe6 7.Rab1 Rxg3 8.fxg3 = (0.09) Depth: 20/47 02:13:20 4958944kN (Celeron 1.2GHz, 832MB hash, 3, 4 & 5 piece EGTB's 08.02.2002) On February 07, 2002 at 12:49:32, Uri Blass wrote: >[D]4rnk1/pp1q1ppp/2p4r/3p4/3P4/4P1NP/PPQ2PP1/R3R1K1 w - - 0 1 > > >I read that in this position Fritz7 could find b4 only without futility pruning. > >I have 3 questions: > >1)Is 1.b4 the only best move for white? > >I believe that humans do not understand much about chess and the fact that >humans said that b4 is the best move is not enough to convince me. > >I will be more convinced if I find that Fritz can win a game against itself >after 1.b4 and cannot win a game against itself after a different move that it >prefers. > > > >2)Can Fritz with the default setting(futility pruning) find 1.b4 after enough >time? > >3)Does Fritz(without futility pruning) find b4 without changing it's mind(please >test for a long time) > >Uri
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