Author: Robert Hyatt
Date: 10:05:35 06/02/00
Go up one level in this thread
On June 02, 2000 at 12:51:00, blass uri wrote: >On June 02, 2000 at 10:39:51, Robert Hyatt wrote: > >>On June 02, 2000 at 09:56:47, blass uri wrote: >> >>>On June 02, 2000 at 08:32:31, blass uri wrote: >>> >>>>This position is from the game tal2.03-Junior6a >>>> >>>>[D]r2qr3/pb3pk1/np3b1N/2pp3Q/3P4/1PR1P1P1/P4PBP/5RK1 w - - 0 1 >>>> >>>>1)How much time does your program need to find 1.g4? >>>> >>>>2)How much time does your program need to avoid 1.g4? >>>> >>>>1.g4 is probably not the best move because of the line 1.g4 Rh8 2.Qxf7+ Kxh6 >>>>3.f4 Rg8 4.Qxb7 Nb4 5.g5+ Bxg5 6.fxg5+ Qxg5 7.Rf2 Raf8 8.Qd7 Rxf2 >>>> >>>>Uri >>> >>>The best move may be e4 or Nxf7. >>> >>>If it g4 then white has not more than a draw and the question is how much time >>>does your program need to see not more than a draw evaluation with the move g4 >>>or another move. >>> >>>Uri >> >> >>Maybe "crafty" is simply dense here: >> >> (2) 5-> 0.35 -0.39 1. Nxf7 Qe7 2. Nh6 Qe6 3. Nf5+ Kg8 >> 6 0.42 -0.26 1. Nxf7 Qe7 2. Nh6 Qe6 3. Nf5+ Kg8 >> 4. h3 >> 6-> 0.64 -0.26 1. Nxf7 Qe7 2. Nh6 Qe6 3. Nf5+ Kg8 >> 4. h3 >> 7 0.90 -0.07 1. Nxf7 Qd7 2. Nh6 Rf8 3. Ng4 Be7 4. >> Ne5 >> 7-> 1.21 -0.07 1. Nxf7 Qd7 2. Nh6 Rf8 3. Ng4 Be7 4. >> Ne5 >> 8 1.54 -0.16 1. Nxf7 Qd7 2. Nh6 cxd4 3. exd4 Kf8 >> 4. Nf5 Rac8 5. Rfc1 >> (4) 8-> 2.56 -0.16 1. Nxf7 Qd7 2. Nh6 cxd4 3. exd4 Kf8 >> 4. Nf5 Rac8 5. Rfc1 >> (3) 9 3.58 -0.15 1. Nxf7 Qd7 2. Nh6 cxd4 3. exd4 b5 >> 4. Nf5+ Kg8 5. Qg4+ Kh8 6. Qh5+ Qh7 >> 7. Qxh7+ Kxh7 8. h3 >> (4) 9-> 7.45 -0.15 1. Nxf7 Qd7 2. Nh6 cxd4 3. exd4 b5 >> 4. Nf5+ Kg8 5. Qg4+ Kh8 6. Qh5+ Qh7 >> 7. Qxh7+ Kxh7 8. h3 >> (3) 10 11.57 -0.07 1. Nxf7 Qd7 2. Nh6 Rad8 3. Ng4 Rh8 >> 4. Nxf6 Rxh5 5. Nxh5+ Kf8 6. Nf6 >> (4) 10-> 29.00 -0.07 1. Nxf7 Qd7 2. Nh6 Rad8 3. Ng4 Rh8 >> 4. Nxf6 Rxh5 5. Nxh5+ Kf8 6. Nf6 >> (3) 11 38.04 -0.02 1. Nxf7 Qd7 2. Nh6 Rad8 3. Bh3 Qc7 >> 4. Bf5 Kf8 5. Bg6 Re6 6. Qf5 >> (4) 11-> 2:44 -0.02 1. Nxf7 Qd7 2. Nh6 Rad8 3. Bh3 Qc7 >> 4. Bf5 Kf8 5. Bg6 Re6 6. Qf5 >> (3) 12 3:10 -0.02 1. Nxf7 Qd7 2. Nh6 Rad8 3. h3 cxd4 >> 4. Nf5+ Kf8 5. Nxd4 Bxd4 6. exd4 Kg8 >> 7. Qg5+ Qg7 8. Qf4 >> 12 9:48 38/42 1. Qxd5 >> >> >>I will let it run longer, but at reasonable time controls, Nxf7 is all it would >>play here. It is neither happy nor worried about the position... > >Crafty17.10(engine for Hiarcs7.32) on pIII450 found g4 after almost 40 minutes >at depth 12 with a small positive score(0.13) >At depth 13 after more than anhour g4 failed low with evaluation of -0.48 so I >guess that crafty is going to change its mind at this depth. > >Uri It didn't change thru depth=14, where I stopped it. No idea why 17.10 would, but 17.11 would not, except that I am using an SMP search and this often produces different results than a single-cpu program.
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