Author: Dann Corbit
Date: 18:33:05 02/28/00
Go up one level in this thread
On February 28, 2000 at 19:24:32, José Antônio Fabiano Mendes wrote:
>Kasparov -Topalov 1-0 Hoogovens 1999
>http://meikel.com/chess/weijk1.shtml
>[D]3r3r/Rb3p1p/p4np1/1p1q4/kP6/P1Q2PPB/2P4P/1K6 w - -
>Fritz5 missed 30.Rxb7!! here,suggesting 30.Qc7? instead.
>How about Fritz6a?[and friends] Enjoy,JAFM
Crafty 17.08 takes nearly 21 minutes to find it on my system:
nss depth time score variation (1)
6 0.42 ++ 1. Rxb7!!
6 0.93 -1.51 1. Rxa6+ Bxa6 2. Qc7 Qb3+ 3. cxb3+
Kxa3 4. Qa5+ Kxb3 5. Qa2+ Kxb4 6. Qxa6
Nd5 7. Kc2
6-> 0.98 -1.51 1. Rxa6+ Bxa6 2. Qc7 Qb3+ 3. cxb3+
Kxa3 4. Qa5+ Kxb3 5. Qa2+ Kxb4 6. Qxa6
Nd5 7. Kc2
7 1.05 ++ 1. Rxa6+!!
7 1.35 -0.72 1. Rxa6+ Bxa6 2. Qc7 Qb3+ 3. cxb3+
Kxa3 4. Qa5+ Kxb3 5. Qa2+ Kxb4 6. Qb2+
Kc4 7. Qxf6 Bb7 8. Qxf7+
7-> 1.59 -0.72 1. Rxa6+ Bxa6 2. Qc7 Qb3+ 3. cxb3+
Kxa3 4. Qa5+ Kxb3 5. Qa2+ Kxb4 6. Qb2+
Kc4 7. Qxf6 Bb7 8. Qxf7+
8 2.32 -0.40 1. Rxa6+ Bxa6 2. Qc7 Qb3+ 3. cxb3+
Kxa3 4. Qc1+ Kxb4 5. Kb2 Nd5 6. Qa1
Kc5 7. Qxa6
8 23.57 ++ 1. Qc7!!
8 23.68 0.00 1. Qc7 Qd1+ 2. Kb2 Qd4+ 3. Kb1 Qd1+
8-> 23.91 0.00 1. Qc7 Qd1+ 2. Kb2 Qd4+ 3. Kb1 Qd1+
9 36.72 0.00 1. Qc7 Qd1+ 2. Kb2 Qd4+ 3. Kb1 Qd1+
9-> 41.14 0.00 1. Qc7 Qd1+ 2. Kb2 Qd4+ 3. Kb1 Qd1+
10 1:06 0.00 1. Qc7 Qd1+ 2. Kb2 Qd4+ 3. Kb1 Qd1+
10-> 1:11 0.00 1. Qc7 Qd1+ 2. Kb2 Qd4+ 3. Kb1 Qd1+
11 1:52 0.00 1. Qc7 Qd1+ 2. Kb2 Qd4+ 3. Kb1 Qd1+
11-> 3:45 0.00 1. Qc7 Qd1+ 2. Kb2 Qd4+ 3. Kb1 Qd1+
12 5:27 0.00 1. Qc7 Qd1+ 2. Kb2 Qd4+ 3. Kb1 Qd1+
12 20:54 ++ 1. Rxb7!!
Since the payoff does not appear until ply 12, I think it quite amazing that
some programs might find it within tournament time controls. It's a pretty busy
position (only 30 choices, but many of them seem to be about the same in ce and
must be investigated fairly thoroughly).
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