Author: John Merlino
Date: 17:10:13 03/07/01
Go up one level in this thread
On March 07, 2001 at 18:08:04, Sune Larsson wrote: > > [D]8/5p2/6PR/7P/1k6/p7/7r/1K6 w - - 0 1 > > Okey, some programs were very fast on the previous one, which was > a bit shortened. I was fooled by Fritz who just saw a draw after > more than 13 minutes, therefore decided to make it a bit easier. > This study is proved correct since the ending KQ-KRP was a forced > mate in a multitude of moves. > Now something to chew on for you fast drawers! No compromises any more. > This is the real stuff: > > Test: White to move and win. Nothing else counts. > The ultimate solution further down. > > > Sune > > > > > > > >Mozes,L >1975 > >1.g7 [1.gxf7? Rf2] 1...a2+! 2.Ka1 Ka3 3.Ra6+ Kb3 4.Rb6+ Ka3 5.Rb1 axb1Q+ 6.Kxb1 >Kb3 7.Kc1 Kc3 8.Kd1 Kd3 9.Ke1 Ke3 10.Kf1 Kf3 11.g8Q Rh1+ 12.Qg1 Rxg1+ 13.Kxg1 >Kg4 14.h6 1-0 CM8000, on a P3-600 with a 32MB hash table and selective search=12, finds it in just over 31 minutes: Time Depth Score Positions Moves 0:00 1/6 0.00 50642 1. g7 a2+ 2. Ka1 Kb3 3. Rb6+ Ka3 4. Ra6+ Kb3 5. Rb6+ 0:01 1/6 0.52 65200 1. gxf7 Rh1+ 2. Kc2 Rh2+ 3. Kd3 Rf2 4. Rb6+ Ka4 5. Ra6+ Kb3 6. Ra7 a2 7. Rb7+ Ka3 0:01 1/7 0.39 88394 1. gxf7 Rh1+ 2. Kc2 Rh2+ 3. Kd3 Rf2 4. Rb6+ Ka4 5. h6 Rxf7 6. Ra6+ Kb3 7. Ra8 0:02 1/8 0.36 144882 1. gxf7 Rh1+ 2. Kc2 Rh2+ 3. Kd3 Rf2 4. Rb6+ Ka4 5. h6 Rxf7 6. Rb8 Rd7+ 7. Kc3 Rc7+ 8. Kd4 0:04 2/9 0.49 326298 1. gxf7 Rf2 2. Rb6+ Ka4 3. Ka1 Rxf7 4. h6 Rf2 5. Rb8 Rf1+ 6. Rb1 Rf2 0:06 3/10 0.52 551596 1. gxf7 Rf2 2. Rb6+ Ka4 3. Ka1 Rxf7 4. h6 Rf2 5. Rb8 Rh2 6. Ra8+ Kb3 0:11 4/11 0.57 979268 1. gxf7 Rf2 2. Rb6+ Ka4 3. Ka1 Rxf7 4. Rb1 Rf2 5. Rh1 Kb3 6. Rh3+ Kb4 7. h6 0:22 5/12 0.60 2088917 1. gxf7 Rf2 2. Rb6+ Ka4 3. Ka1 Rxf7 4. Rb1 Rf2 5. Rh1 Kb3 6. Rh3+ Kb4 7. h6 Rf1+ 8. Ka2 Rf2+ 9. Kb1 1:14 6/13 0.27 7034317 1. gxf7 Rf2 2. Rb6+ Ka4 3. Ka1 Rxf7 4. Rb1 Rf2 5. Rh1 Kb3 6. Rh3+ Kb4 7. h6 Rf1+ 8. Ka2 Rf2+ 9. Kb1 Rf1+ 10. Kc2 2:05 7/14 0.00 12440341 1. gxf7 Rf2 2. Rb6+ Ka4 3. Ka1 Rxf7 4. Rb1 Rf2 5. Rh1 Kb3 6. Rh3+ Kb4 7. h6 Rf1+ 8. Ka2 Rf2+ 9. Kb1 Rf1+ 10. Ka2 31:05 7/14 1.36 158465914 1. g7 a2+ 2. Ka1 Kb3 3. Rb6+ Ka3 4. Rb1 axb1=Q+ 5. Kxb1 Kb3 6. Kc1 Kc3 7. Kd1 Kd3 8. Ke1 Ke3 9. Kf1 Rxh5 10. g8=Q f5 54:10 8/15 1.30 274404799 1. g7 a2+ 2. Ka1 Kb3 3. Rb6+ Ka3 4. Rb1 axb1=Q+ 5. Kxb1 Kb3 6. Kc1 Kc3 7. Kd1 Kd3 8. Ke1 Ke3 9. Kf1 Rxh5 10. g8=Q Rf5+ 11. Ke1 Ke4 jm
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