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
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