Author: Robert Hyatt
Date: 07:23:38 04/01/05
Go up one level in this thread
On March 31, 2005 at 11:21:10, Mihaly Szalai wrote:
>I think this is a very good engine test.
>Try to avoid Rh1+ (leads to a draw) and find Rg1!
>
>J. Fleck - Ch. Lutz
>
>[D]8/7r/1pp4P/8/1P1K4/7k/8/R7 w - - 0 1
>
>1. Rg1! (1. Rh1+? Kg2 2. Rh5 c5+ 3. bxc5 bxc5+ 4. Ke5 Kf3 5. Kf6 Ke3=) 1... c5+
>(
>1... Kh4 2. Ke4 Rxh6 3. Ke5 c5 4. b5 c4 5. Rh1+ Kg5 6. Rxh6 Kxh6 7. Kd4+-) 2.
>bxc5 bxc5+ 3. Ke5 c4 4. Kf5 Kh2 5. Rg6 Rc7 6. Rg7 Rc5+ 7. Kg4 c3 8. h7 Rc4+ 9.
>Kg5 Rc5+ 10. Kh6 c2 11. h8=Q c1=Q+ 12. Kg6+ Kg3 13. Kf6++-
Here's crafty's analysis. Note that this was run on a slow box (300K nodes per
sec). It likes Rg1 early, that turns into a draw score and it switches to Rh1+
until it fails high on Rg1 later...
14 1:05 0.26 1. Rh1+ Kg2 2. Rh5 c5+ 3. Ke5 cxb4
4. Kf6 b3 5. Kg6 Rc7 6. h7 Rc6+ 7.
Kg7 Rc7+ 8. Kg8 Rc8+ 9. Kg7 Rc7+ <HT>
14 2:27 +1 1. Rg1!!
14 2:43 +3 1. Rg1!!
14 3:23 2.24 1. Rg1 Kh4 2. Ke4 Kh5 3. Kf5 Rf7+ 4.
Ke6 Ra7 5. Kf6 Rh7 6. Rh1+ Kg4 7. Kg6
Rh8 8. Rg1+ Kf3 9. Rf1+ Ke3 10. Re1+
Kd3
14-> 3:23 2.24 1. Rg1 Kh4 2. Ke4 Kh5 3. Kf5 Rf7+ 4.
Ke6 Ra7 5. Kf6 Rh7 6. Rh1+ Kg4 7. Kg6
Rh8 8. Rg1+ Kf3 9. Rf1+ Ke3 10. Re1+
Kd3 (s=2)
15 3:42 2.33 1. Rg1 Kh4 2. Ke4 Kh5 3. Kf5 Rf7+ 4.
Ke6 Ra7 5. Kf6 Rh7 6. Rh1+ Kg4 7. Kg6
Rh8 8. Rg1+ Kf3 9. Kg7 Re8 10. h7 Re7+
11. Kg8
15-> 4:16 2.33 1. Rg1 Kh4 2. Ke4 Kh5 3. Kf5 Rf7+ 4.
Ke6 Ra7 5. Kf6 Rh7 6. Rh1+ Kg4 7. Kg6
Rh8 8. Rg1+ Kf3 9. Kg7 Re8 10. h7 Re7+
11. Kg8
16 4:39 +1 1. Rg1!!
16 5:00 +3 1. Rg1!!
16 6:02 4.29 1. Rg1 Kh4 2. Ke4 Kh5 3. Kf5 Rf7+ 4.
Ke6 Ra7 5. Kf6 Rh7 6. Rh1+ Kg4 7. Kg6
Rh8 8. h7 c5 9. Kg7 Ra8 10. h8=Q Rxh8
11. Rxh8 cxb4
? 16 6:02 3/21* 1. b5
White(1): ?
time=6:10 cpu=66% mat=0 n=114794568 fh=88% nps=309K
ext-> chk=7450656 cap=164952 pp=574537 1rep=191545 mate=23416
predicted=0 nodes=114794568 evals=63133307 50move=0
endgame tablebase-> probes=424971 hits=177038
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