Author: Bernhard Bauer
Date: 00:35:27 12/10/99
Hallo chess friends,
some days ago Vincent posted a position that looked difficult for chess
programs. The FEN was:
Original pos: 7k/2q3pP/6P1/8/8/8/6Pp/2RR3K/ w - -.
+---+---+---+---+---+---+---+---+
8 | | | | | | | | *K|
+---+---+---+---+---+---+---+---+
7 | | | *Q| | | | *P| P |
+---+---+---+---+---+---+---+---+
6 | | | | | | | P | |
+---+---+---+---+---+---+---+---+
5 | | | | | | | | |
+---+---+---+---+---+---+---+---+
4 | | | | | | | | |
+---+---+---+---+---+---+---+---+
3 | | | | | | | | |
+---+---+---+---+---+---+---+---+
2 | | | | | | | P | *P|
+---+---+---+---+---+---+---+---+
1 | | | R | R | | | | K |
+---+---+---+---+---+---+---+---+
a b c d e f g h
After some moves I came to the related position
Modified pos: 4q2k/6pP/6P1/3R/8/8/6Pp/5R1K/ w - -
This modified position I gave to a modified crafty and it found a win.
Here it is:
+---+---+---+---+---+---+---+---+
8 | | | | | *Q| | | *K|
+---+---+---+---+---+---+---+---+
7 | | | | | | | *P| P |
+---+---+---+---+---+---+---+---+
6 | | | | | | | P | |
+---+---+---+---+---+---+---+---+
5 | | | | R | | | | |
+---+---+---+---+---+---+---+---+
4 | | | | | | | | |
+---+---+---+---+---+---+---+---+
3 | | | | | | | | |
+---+---+---+---+---+---+---+---+
2 | | | | | | | P | *P|
+---+---+---+---+---+---+---+---+
1 | | | | | | R | | K |
+---+---+---+---+---+---+---+---+
a b c d e f g h
White(1): end-game phase
clearing hash tables
time surplus 0.00 time limit 960:00 (960:00)
nss depth time score variation (1)
starting thread 1
(2) 7 0.57 4.26 1. Rd4 Qa8 2. Re4 Qc8 3. Rfe1 Qf8 4.
Kxh2
7-> 0.95 4.26 1. Rd4 Qa8 2. Re4 Qc8 3. Rfe1 Qf8 4.
Kxh2
8 1.23 4.22 1. Rd4 Qb8 2. Rc4 Qe8 3. Rb4 Qc8 4.
Rbf4 Qf5 5. Rd1 Qc8 6. Kxh2 Qe6 <HT>
(3) 8-> 2.31 4.22 1. Rd4 Qb8 2. Rc4 Qe8 3. Rb4 Qc8 4.
Rbf4 Qf5 5. Rd1 Qc8 6. Kxh2 Qe6 <HT>
(2) 9 2.50 4.22 1. Rd4 Qb8 2. Rc4 Qe8 3. Rb4 Qc8 4.
Rbf4 <HT>
(4) 9-> 5.84 4.22 1. Rd4 Qb8 2. Rc4 Qe8 3. Rb4 Qc8 4.
Rbf4 <HT>
10 6.09 ++ 1. Rd4!!
(3) 10-> 18.32 4.61 1. Rd4 Qb8 2. Rc4 Qe8 3. Rb4 Qc8 4.
Rbf4 Qf5 <HT>
11 18.87 ++ 1. Rd4!!
(2) 11 25.29 5.29 1. Rd4 Qxg6 2. Rf8+ Kxh7 3. Rh4+ Qh6
4. Rxh6+ gxh6 5. Kxh2 Kg7 6. Rd8 Kg6
7. Kg3 Kg5 8. Rd5+ Kg6
11 51.40 5.44 1. Rd6 Qb8 2. Ra6 Qe8 3. Ra3 Qxg6 4.
Rf8+ Kxh7 5. Rh3+ Qh6 6. Kxh2 Kg6 7.
Rxh6+ gxh6 8. Kg3 <HT>
(4) 11-> 51.40 5.44 1. Rd6 Qb8 2. Ra6 Qe8 3. Ra3 Qxg6 4.
Rf8+ Kxh7 5. Rh3+ Qh6 6. Kxh2 Kg6 7.
Rxh6+ gxh6 8. Kg3 <HT>
(3) 12 53.31 5.30 1. Rd6 Qb8 2. Ra6 Qe8 3. Re6 Qa8 4.
Rc6 Qb8 5. Re6 Qd8 <HT>
(4) 12-> 2:40 5.30 1. Rd6 Qb8 2. Ra6 Qe8 3. Re6 Qa8 4.
Rc6 Qb8 5. Re6 Qd8 <HT>
13 2:44 ++ 1. Rd6!!
(3) 13 2:58 11.38 1. Rd6 Qb8 2. Re6 Qa8 3. Rc6 Qe8 4.
Ra6 Qxg6 5. Rxg6 Kxh7 6. Rxg7+ Kh6
7. Rff7 Kh5 8. Kxh2
(4) 13-> 9:10 11.38 1. Rd6 Qb8 2. Re6 Qa8 3. Rc6 Qe8 4.
Ra6 Qxg6 5. Rxg6 Kxh7 6. Rxg7+ Kh6
7. Rff7 Kh5 8. Kxh2
14 9:15 ++ 1. Rd6!!
(3) 14 9:31 11.89 1. Rd6 Qb8 2. Re6 Qa8 3. Re4 Qb8 4.
Re7 Qa8 5. Rb7 <HT>
(4) 14-> 32:20 11.89 1. Rd6 Qb8 2. Re6 Qa8 3. Re4 Qb8 4.
Re7 Qa8 5. Rb7 <HT>
15 32:21 ++ 1. Rd6!!
(3) 15 33:30 14.56 1. Rd6 Qb8 2. Re6 Qa8 3. Re4 Qc8 4.
Re7 Qa8 5. Rb7 Qe8 6. Rbf7 Qxf7 7.
gxf7 Kxh7 8. Kxh2 Kg6
(4) 15-> 114:53 14.56 1. Rd6 Qb8 2. Re6 Qa8 3. Re4 Qc8 4.
Re7 Qa8 5. Rb7 Qe8 6. Rbf7 Qxf7 7.
gxf7 Kxh7 8. Kxh2 Kg6
(3) 16 127:57 14.28 1. Rd6 Qb8 2. Re6 Qa8 3. Re4 Qc8 4.
Re7 Qa8 5. Rb7 Qe8 6. Rbf7 Qxf7 7.
gxf7 Kxh7 8. f8=Q Kh6 9. Kxh2
(4) 16-> 515:21 14.28 1. Rd6 Qb8 2. Re6 Qa8 3. Re4 Qc8 4.
Re7 Qa8 5. Rb7 Qe8 6. Rbf7 Qxf7 7.
gxf7 Kxh7 8. f8=Q Kh6 9. Kxh2
17 515:24 ++ 1. Rd6!!
(3) 17 542:28 14.76 1. Rd6 Qb8 2. Re6 Qa8 3. Re4 Qb8 4.
Re7 Qa8 5. Rb7 Qe8 6. Rbf7 Qxf7 7.
gxf7 Kxh7 8. Kxh2 g5 9. Kg3 Kg7 10.
f8=Q+
What does Tiger says to the above position?
One would assume it doing 10 times better, as his author certainly belongs to
those persons who have invested 10 times more efford than some others.
Independent beta testers will tell.
Kind regards
Bernhard
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