Author: Paul Jacobean Sacral
Date: 05:48:56 10/21/05
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On October 21, 2005 at 08:11:51, Mark jones wrote: >1...Nf4+ 2.gxf4 Qg6+ 3.Kh1 Qxe4 4.Kg1 Qxf4 5.Rd2 Rh3 6.f3 d5 > = (-0.24) Depth: 9/28 00:00:02 1358kN I tested Toga II 1.0 too, see my previous posting in this thread, but it took 8 seconds to find Nf4+. I found the explanation: It takes 8 s on P4/3.0 GHz when you start it from within the complete game notation, after 20.Qe2, and 2 s only when you start it from the position without game history. Sometimes it is important to use the complete notation because of possible repetitions or the 50 move rule, although I think it is not important here. Therefore the difference of 8 to 2 seconds is surprising to me. Analysis by Toga II 1.0: 20...Rf4 = (-0.13) Depth: 1/6 00:00:00 20...b5 21.Qxb5 Rxf2+ 22.Kh1 = (-0.24) Depth: 1/7 00:00:00 20...Ne7 21.Nf5 µ (-0.72) Depth: 1/8 00:00:00 = (-0.03) Depth: 2/12 00:00:00 20...Qd7 21.Nf5 Rf4 = (-0.04) Depth: 2/12 00:00:00 = (0.04) Depth: 3/13 00:00:00 20...Rf4 21.Nc4 Rf3 22.Ne3 ³ (-0.42) Depth: 3/14 00:00:00 = (0.00) Depth: 4/16 00:00:00 20...Qd7 21.Nf5 Rf4 22.Kh1 exf5 23.gxf4 Nxf4 = (-0.15) Depth: 4/16 00:00:00 = (-0.24) Depth: 5/20 00:00:00 20...Ne7 21.Kg1 Nc6 22.Qb5 Qd7 23.Rd2 a5 24.Kh1 ³ (-0.33) Depth: 5/20 00:00:00 = (-0.20) Depth: 8/27 00:00:00 318kN 20...Qd7 21.Kg1 Qc6 22.Qc4 Qb7 23.a4 a6 24.Rd2 b5 = (-0.21) Depth: 8/27 00:00:00 422kN = (-0.20) Depth: 9/27 00:00:01 797kN 20...Nf4+ 21.gxf4 Qg6+ 22.Kh1 Qxe4 23.Kg1 Rf6 24.Rfe1 Rg6+ 25.Kf1 Rxf4 26.Qa6 d5 27.Rd2 Qh1+ 28.Ke2 Qf3+ 29.Kf1 Qh3+ 30.Ke2 Rxf2+ 31.Kd1 Qh5+ 32.Kc1 Qxh2 33.Rxf2 Qxf2 = (-0.24) Depth: 9/28 00:00:02 1358kN µ (-1.28) Depth: 15/42 00:00:24 16189kN (I use the engine window option "scroll new moves only") Yours truly Paul J. Sacral
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