Author: Ernst Walet
Date: 13:33:40 03/02/01
Go up one level in this thread
On March 02, 2001 at 15:34:11, Sune Larsson wrote: >On March 02, 2001 at 15:16:38, John Merlino wrote: > >>On March 02, 2001 at 10:10:08, Sune Larsson wrote: >> >>> >>> 8/6r1/Pp5p/7k/p7/7K/6P1/R7 w - - 0 2 >>> >>> Wotawa 1951 >>> >>> Rookending and black is a pawn up. But white can take it back in a minute. >>> So a draw or what? No, by breaking the rules for "normal" play in a >>> rookending, the white rook becomes the rebellious hero of the day. >>> >>> Test: To find the winning line for white in normal tournament level. >>> >>> Sune >> >>CM8000 took a while to make up its mind on this one. Is 1.Rb1 the "right" >>answer? > > Nope, should be 1.Ra3 followed by 2.Rg3, like in one of your lines. >> >>Time Depth Score Positions Moves >>0:00 6/7 0.94 44484 1. Rxa4 Ra7 2. Kg3 b5 3. Ra5 Kg6 >> 4. Kf4 b4 >>0:02 7/8 1.03 180856 1. Rxa4 Ra7 2. Kg3 b5 3. Ra5 Kg6 >> 4. Kf4 b4 5. Ke4 >>0:03 7/8 1.27 292920 1. Rb1 Kg5 2. Rb5+ Kf6 3. Rxb6+ >> Ke5 4. Rb7 Rg8 5. Rb5+ Kd6 6. Ra5 >> Kc6 7. Rxa4 >>0:07 8/9 1.33 634575 1. Rb1 Kg5 2. Rxb6 Ra7 3. Rb5+ >> Kf6 4. Ra5 Ke7 5. Rxa4 Kd6 >>0:17 9/10 1.38 1623748 1. Rb1 Kg5 2. Rxb6 Ra7 3. Rb5+ >> Kf6 4. Ra5 Ke6 5. Rxa4 Kd5 6. Ra5+ >> Kc6 7. Kg4 >>0:34 10/11 1.39 3381724 1. Rb1 Kg5 2. Rxb6 Ra7 3. Rb5+ >> Kf6 4. Ra5 Ke6 5. Rxa4 Kd7 6. Kg4 >> Kd6 >>0:47 10/11 1.81 4770673 1. Ra3 Re7 2. Rg3 a3 3. a7 Rxa7 >> 4. Rg8 Ra4 5. g4+ Rxg4 6. Rxg4 >> b5 7. Rb4 a2 8. Rxb5+ Kg6 >>0:58 11/12 1.03 5881376 1. Ra3 Re7 2. Rg3 a3 3. Rxa3 Ra7 >> 4. Kg3 b5 5. Ra5 Kg6 6. Kf3 b4 >> 7. Ke4 >>1:43 11/12 1.38 10375062 1. Rb1 Kg5 2. Rb5+ Kf4 3. Rxb6 >> a3 4. Rb5 a2 5. Ra5 Ra7 6. Rxa2 >> Ke5 7. Kg4 Kd6 >>4:14 12/13 1.90 25486527 1. Rb1 Kg5 2. Rxb6 Ra7 3. Rb5+ >> Kf6 4. Ra5 Ke6 5. Kh4 Kd6 6. Kh5 >> Ra8 7. Rxa4 Rg8 8. a7 >> >>jm CM8000 on my PIII-500E with 128MB hash and Selective Search=12 finds Ra3 at ply 14 in just over 2 minutes. Ernst. Time Depth Score Positions Moves 0:03 1/8 1.31 123837 1. Rb1 Kg5 2. Rb5+ Kf4 3. Rxb6 Ke5 4. Rb4 Kd5 5. Rxa4 Ra7 0:03 2/9 1.31 190886 1. Rb1 Kg5 2. Rb5+ Kf4 3. Rxb6 a3 4. Rb3 a2 5. Rb4+ Ke5 6. Ra4 Ra7 7. Rxa2 0:06 3/10 1.31 372038 1. Rb1 Kg5 2. Rb5+ Kf4 3. Rxb6 a3 4. Rb4+ Ke5 5. Ra4 Ra7 6. Rxa3 Kd6 0:11 4/11 1.36 820731 1. Rb1 Kg5 2. Rxb6 Ra7 3. Rb5+ Kf6 4. Ra5 Ke7 5. Rxa4 Kd6 6. Kg3 h5 0:18 5/12 1.35 1465058 1. Rb1 Kg5 2. Rxb6 Ra7 3. Rb5+ Kf6 4. Ra5 Ke7 5. Rxa4 Kd6 6. Kg4 Kc6 7. Kf4 Kb6 0:47 6/13 1.44 3939318 1. Rb1 Kg5 2. Rxb6 Ra7 3. Rb5+ Kf6 4. Ra5 Ke7 5. Rxa4 Kd6 6. Kg4 Kc6 7. Kh5 Kb5 1:37 7/14 1.76 8443501 1. Rb1 Kg5 2. Rxb6 Ra7 3. Rb5+ Kf6 4. Ra5 Ke7 5. Kh4 Kf6 6. Rxa4 Kg6 7. Ra5 Kf6 8. Kh5 2:02 7/14 1.88 10687064 1. Ra3 Re7 2. Rg3 a3 3. a7 Rxa7 4. Rg8 Ra4 5. g4+ Rxg4 6. Rxg4 b5 7. Rb4 Kg6 8. Rxb5 Kf6 9. Kg4 a2 2:59 8/15 4.70 15723862 1. Ra3 Re7 2. Rg3 a3 3. a7 Rxa7 4. Rg8 Ra4 5. g4+ Rxg4 6. Rxg4 b5 7. Rb4 Kg5 8. Rxb5+ Kf4 9. Ra5 h5 10. Rxa3 Ke5 5:17 9/16 4.77 28299759 1. Ra3 Re7 2. Rg3 a3 3. a7 Rxa7 4. Rg8 Ra4 5. g4+ Rxg4 6. Rxg4 b5 7. Rb4 Kg5 8. Rxb5+ Kf4 9. Ra5 h5 10. Rxa3 Ke4 11. Kg3
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.