Author: John Merlino
Date: 12:35:37 03/07/01
Go up one level in this thread
On March 07, 2001 at 13:59:17, Sune Larsson wrote: > > [D]8/5pP1/1R6/7P/8/k7/p6r/K7 w - - 0 5 > > After Mozes,L 1975 > > This is a rook ending with 2 vs 2 pawns. White is in huge trouble. > True he has two alert passers but he is facing an acute mate threat > on the first rank. The draw is there with 1.Ra6+ Kb3 2.Rb6+ etc. but > is there way to play for win without committing suicide? > After 10 minutes Fritz shows 0.00. War or peace? > > > Test: 1) White to move and play for a win. Find the + evals! > > 2) According to Mr Mozes it's white to move and win. > Is this true? Some positions with KQ - KRP might > easily happen. This is for people who have all the 5 men TB:s. > The original solution further down. > > > Sune > > > > > > > >Mozes,L >1975 > >1.Rb1 axb1Q+ 2.Kxb1 Kb3 3.Kc1 Kc3 4.Kd1 Kd3 5.Ke1 Ke3 6.Kf1 Kf3 7.g8Q Rh1+ 8.Qg1 >Rxg1+ 9.Kxg1 Kg4 10.h6 1-0 > >What about all the 5 men endings if black takes the h-pawn somewhere? >Are they all won for white? No problem for CM8000, as it sees the answer in 2:52 on a P3-600: Time Depth Score Positions Moves 0:00 4/5 0.00 5029 1. Ra6+ Kb3 2. Rb6+ Ka3 0:00 6/7 0.00 38870 1. Ra6+ Kb3 2. Rb6+ Ka3 0:01 7/8 0.00 96594 1. Ra6+ Kb3 2. Rb6+ Ka3 0:02 8/9 0.00 253904 1. Ra6+ Kb3 2. Rb6+ Ka3 0:07 9/10 0.00 686900 1. Ra6+ Kb3 2. Rb6+ Ka3 0:17 10/11 0.00 1733359 1. Ra6+ Kb3 2. Rb6+ Ka3 2:52 10/11 1.36 17416616 1. Rb1 axb1=Q+ 2. Kxb1 Kb3 3. Kc1 Kc3 4. Kd1 Kd3 5. Ke1 Ke3 6. Kf1 Rxh5 7. g8=Q f5 6:30 11/12 1.30 38386917 1. Rb1 axb1=Q+ 2. Kxb1 Kb3 3. Kc1 Kc3 4. Kd1 Kd3 5. Ke1 Ke3 6. Kf1 Rxh5 7. g8=Q Rf5+ 8. Ke1 Ke4 19:52 12/13 1.41 114787819 1. Rb1 axb1=Q+ 2. Kxb1 Kb3 3. Kc1 Kc3 4. Kd1 Kd3 5. Ke1 Ke3 6. Kf1 Rxh5 7. g8=Q Rf5+ 8. Ke1 Ke4 9. Qg4+ Rf4 jm
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