Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Test Position = Study by David Przepiorka [Vorwärts, 1910]

Author: Mike Byrne

Date: 18:13:55 02/05/04

Go up one level in this thread


On February 05, 2004 at 15:07:27, José Antônio Fabiano Mendes wrote:

>  Study by David Przepiorka [Vorwärts, 1910]   vorwärts ==> onward/forward/ahead
>  [D]R5n1/4n2p/4K2P/2k3P1/1p6/8/8/8 w
>  The only winning move is 1. Rb8 then 1...Kc4 2. Rxg8 Nxg8 3. g6 b3 4. gxh7 b2
>  5. hxg8=Q b1=Q 6. h7 Qe4+ 7. K moves, discovered check and White wins. Now we
>  understand the purpose of 1. Rb8, White King moves with check.
>  Source ==> "Ajedrez", Editorial Sopena Argentina, April 1978, page 191


I think Rg8 might win based on Crafty 19.10 SE analysis

;>)   ...

              clearing hash tables
              time surplus  29.72  time limit 166666:39 (166666:39)
              time surplus  29.72  time limit 166666:39 (166666:39)
              depth   time  score   variation (1)
                3     0.00     --   1. Ra5+
                3     0.00  -2.76   1. Ra5+ Kb6 2. Ra4 b3
                3     0.00  -2.55   1. Ra7 b3 2. Rb7
                3     0.00     ++   1. g6!!
                3     0.00   0.00   1. g6 Nxh6 2. gxh7 Ng6 3. h8=Q Nxh8
                                    4. Rxh8
                3->   0.02   0.00   1. g6 Nxh6 2. gxh7 Ng6 3. h8=Q Nxh8
                                    4. Rxh8
                4     0.02   0.00   1. g6 Nxh6 2. gxh7 Ng6 3. h8=Q Nxh8
                                    4. Rxh8
                4->   0.03   0.00   1. g6 Nxh6 2. gxh7 Ng6 3. h8=Q Nxh8
                                    4. Rxh8
                5     0.03     ++   1. g6!!
                5     0.03   0.65   1. g6 Nxg6 2. Rc8+ Kd4 3. Rd8+ Kc3
                                    4. Rc8+ Kd3 5. Rxg8
                5->   0.05   0.65   1. g6 Nxg6 2. Rc8+ Kd4 3. Rd8+ Kc3
                                    4. Rc8+ Kd3 5. Rxg8
                6     0.05   0.38   1. g6 Nxg6 2. Rxg8 b3 3. Rc8+ Kd4 4.
                                    Rc7
                6     0.06     ++   1. Rxg8!!
                6     0.06   2.55   1. Rxg8 Nxg8 2. g6 Ne7 3. Kxe7 b3 4.
                                    gxh7 b2 5. h8=Q b1=Q
                6->   0.08   2.55   1. Rxg8 Nxg8 2. g6 Ne7 3. Kxe7 b3 4.
                                    gxh7 b2 5. h8=Q b1=Q (s=2)
                7     0.08   2.85   1. Rxg8 Nxg8 2. g6 Ne7 3. Kxe7 b3 4.
                                    gxh7 b2 5. Ke6 b1=Q 6. h8=Q
                7->   0.10   2.85   1. Rxg8 Nxg8 2. g6 Ne7 3. Kxe7 b3 4.
                                    gxh7 b2 5. Ke6 b1=Q 6. h8=Q (s=2)
                8     0.10   3.18   1. Rxg8 Nxg8 2. g6 hxg6 3. h7 Nh6 4.
                                    h8=Q Nf5 5. Qe5+ Kc4 6. Qd5+ Kc3
                8->   0.11   3.18   1. Rxg8 Nxg8 2. g6 hxg6 3. h7 Nh6 4.
                                    h8=Q Nf5 5. Qe5+ Kc4 6. Qd5+ Kc3
                9     0.13   3.52   1. Rxg8 Nxg8 2. g6 hxg6 3. h7 Nh6 4.
                                    h8=Q Nf5 5. Qe5+ Kb6 6. Qd5 Ne3
                9->   0.14   3.52   1. Rxg8 Nxg8 2. g6 hxg6 3. h7 Nh6 4.
                                    h8=Q Nf5 5. Qe5+ Kb6 6. Qd5 Ne3
               10     0.20   3.86   1. Rxg8 Nxg8 2. g6 hxg6 3. h7 Nh6 4.
                                    h8=Q Nf5 5. Qe5+ Kb6 6. Qd5 Ng7+ 7.
                                    Kf6 Nf5 8. Kxg6
               10->   0.22   3.86   1. Rxg8 Nxg8 2. g6 hxg6 3. h7 Nh6 4.
                                    h8=Q Nf5 5. Qe5+ Kb6 6. Qd5 Ng7+ 7.
                                    Kf6 Nf5 8. Kxg6
               11     0.28   3.86   1. Rxg8 Nxg8 2. g6 hxg6 3. h7 Nh6 4.
                                    h8=Q Nf5 5. Qe5+ Kb6 6. Qd5 Ng7+ 7.
                                    Kf6 Nf5 8. Kxg6
               11->   0.33   3.86   1. Rxg8 Nxg8 2. g6 hxg6 3. h7 Nh6 4.
                                    h8=Q Nf5 5. Qe5+ Kb6 6. Qd5 Ng7+ 7.
                                    Kf6 Nf5 8. Kxg6
               12     0.55     ++   1. Rxg8!!
               12     7.67   9.61   1. Rxg8 Nc6 2. g6 Nd4+ 3. Kf7 hxg6
                                    4. Rc8+ Kb5 5. h7 Nf5 6. h8=Q Nd6+
                                    7. Ke6 Nb7 8. Qe8+ Kb6 9. Qc6+ Ka7
               12->   7.80   9.61   1. Rxg8 Nc6 2. g6 Nd4+ 3. Kf7 hxg6
                                    4. Rc8+ Kb5 5. h7 Nf5 6. h8=Q Nd6+
                                    7. Ke6 Nb7 8. Qe8+ Kb6 9. Qc6+ Ka7
               13     8.28     ++   1. Rxg8!!
               13    10.30  12.08   1. Rxg8 Nc6 2. g6 Nd4+ 3. Ke5 Nc6+
                                    4. Ke4 hxg6 5. Rc8 g5 6. Rxc6+ Kb5
                                    7. Rg6 b3 8. Rxg5+ Kc4 9. h7 b2 10.
                                    Rg1
               13->  11.63  12.08   1. Rxg8 Nc6 2. g6 Nd4+ 3. Ke5 Nc6+
                                    4. Ke4 hxg6 5. Rc8 g5 6. Rxc6+ Kb5
                                    7. Rg6 b3 8. Rxg5+ Kc4 9. h7 b2 10.
                                    Rg1
               14    17.00     ++   1. Rxg8!!
               14    55.83  15.07   1. Rxg8 Nc6 2. g6 b3 3. gxh7 b2 4.
                                    Rg1 Nd8+ 5. Kf6 Nc6 6. h8=Q Kb6 7.
                                    Qc8 Na7 8. Qb8+ Ka6 9. h7 Nc6 10. Qxb2
               14->   1:02  15.07   1. Rxg8 Nc6 2. g6 b3 3. gxh7 b2 4.
                                    Rg1 Nd8+ 5. Kf6 Nc6 6. h8=Q Kb6 7.
                                    Qc8 Na7 8. Qb8+ Ka6 9. h7 Nc6 10. Qxb2
               15     1:12     ++   1. Rxg8!!
               15     1:18  15.89   1. Rxg8 Nc6 2. g6 b3 3. gxh7 b2 4.
                                    Rg1 Nd8+ 5. Kf6 Nc6 6. h8=Q Kb6 7.
                                    Qc8 Na7 8. Qb8+ Ka6 9. h7 b1=Q 10.
                                    Qxa7+ Kxa7 11. Rxb1
               15->   1:26  15.89   1. Rxg8 Nc6 2. g6 b3 3. gxh7 b2 4.
                                    Rg1 Nd8+ 5. Kf6 Nc6 6. h8=Q Kb6 7.
                                    Qc8 Na7 8. Qb8+ Ka6 9. h7 b1=Q 10.
                                    Qxa7+ Kxa7 11. Rxb1
               16     1:33     ++   1. Rxg8!!
               16     2:49  23.56   1. Rxg8 Nc6 2. g6 b3 3. gxh7 b2 4.
                                    Rg1 Nd8+ 5. Kf6 Nc6 6. h8=Q Kc4 7.
                                    Qc8 Kb5 8. Rb1 Kc5 9. Qf8+ <HT>
               16->   4:00  23.56   1. Rxg8 Nc6 2. g6 b3 3. gxh7 b2 4.
                                    Rg1 Nd8+ 5. Kf6 Nc6 6. h8=Q Kc4 7.
                                    Qc8 Kb5 8. Rb1 Kc5 9. Qf8+ <HT>
?              17     4:00   1/17*  1. Rxg8
White(1): ?
              time=4:09  cpu=98%  mat=-1  n=190136417  fh=91%  nps=761K
              ext-> chk=23192442 cap=29642 pp=2799880 1rep=1330452 mate=17218
              predicted=1  nodes=190136417  evals=37329527
              endgame tablebase-> probes=65064  hits=65064
              SMP->  split=2661  stop=450  data=7/128  cpu=4:06  elap=4:09

White(1): Rxg8



This page took 0.05 seconds to execute

Last modified: Thu, 07 Jul 11 08:48:38 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.