Author: Robert Hyatt
Date: 09:01:46 04/15/02
Go up one level in this thread
On April 15, 2002 at 03:35:07, Slater Wold wrote:
>[D]2r4k/1p3p1p/1pn2q2/1N1p1p2/8/PP2Q2P/5PP1/2R3K1 w - - 0 26
>
>Why in this position is it not perfectly clear that taking the pawn (Qxb6) is
>the obvious move? Instead I've noticed several programs wanting Qf4, a4, and
>other moves that to me, just seem to waste time.
>
>I've spoken with one GM, (2550ish) and he agreed that Qxb6 is the only move that
>he would emphasize on. (It was a quick discussion, no detail.)
>
>This is move 26 of game one in the first match between Deep Blue and Kasparov.
>Deep Blue played Qxb6 and later won the game.
>
>
>
>**I've tested only a few "top commercial" programs. Most want Qf4, a4 and
>others at first, and around 1:30 want Qxb6. My question was, why isn't this
>obvious from the start?**
No idea. But current Crafty doesn't consider anything else: From ply 1
through ply 14...
1 0.00 0.75 1. Qxb6
1-> 0.01 0.75 1. Qxb6
2 0.01 0.57 1. Qxb6 Qg5
2-> 0.01 0.57 1. Qxb6 Qg5
3 0.01 ++ 1. Qxb6!!
3 0.01 1.04 1. Qxb6 Qg5 2. Qe3
3-> 0.04 1.04 1. Qxb6 Qg5 2. Qe3
4 0.04 0.89 1. Qxb6 Qg5 2. Qe3 f4
4-> 0.05 0.89 1. Qxb6 Qg5 2. Qe3 f4
5 0.08 0.92 1. Qxb6 Qg5 2. Qe3 f4 3. Qf3
5-> 0.08 0.92 1. Qxb6 Qg5 2. Qe3 f4 3. Qf3
6 0.15 0.59 1. Qxb6 Rg8 2. Qe3 Qg7 3. Qf3 d4
6-> 0.18 0.59 1. Qxb6 Rg8 2. Qe3 Qg7 3. Qf3 d4
7 0.22 0.71 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Qg5 4.
Re1
7-> 0.28 0.71 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Qg5 4.
Re1
8 0.42 0.60 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Ne5 4.
Qxb7 d3
8-> 0.68 0.60 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Ne5 4.
Qxb7 d3
9 1.11 0.50 1. Qxb6 Rg8 2. Kh1 Qg6 3. Rg1 f4 4.
f3 Re8 5. Nc7 Re2 6. Nxd5
9-> 1.92 0.50 1. Qxb6 Rg8 2. Kh1 Qg6 3. Rg1 f4 4.
f3 Re8 5. Nc7 Re2 6. Nxd5
10 3.96 0.58 1. Qxb6 Rg8 2. Qc5 Qg5 3. g3 f4 4.
Nd6 Nd8 5. Qd4+ f6 6. Rc3 fxg3 7. fxg3
10-> 5.78 0.58 1. Qxb6 Rg8 2. Qc5 Qg5 3. g3 f4 4.
Nd6 Nd8 5. Qd4+ f6 6. Rc3 fxg3 7. fxg3
11 11.77 0.53 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Qe5 4.
a4 f4 5. Rc2 Qe1+ 6. Kh2 Qe5 7. Kg1
11-> 17.52 0.53 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Qe5 4.
a4 f4 5. Rc2 Qe1+ 6. Kh2 Qe5 7. Kg1
12 25.47 0.44 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Qe5 4.
a4 f4 5. h4 Qg7 6. Nd6 d3 7. Nxb7
12-> 38.63 0.44 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Qe5 4.
a4 f4 5. h4 Qg7 6. Nd6 d3 7. Nxb7
13 1:01 0.39 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Qe5 4.
a4 Rd8 5. Rd1 f6 6. Qd3 Nb4 7. Qf3
13-> 1:42 0.39 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Qe5 4.
a4 Rd8 5. Rd1 f6 6. Qd3 Nb4 7. Qf3
14 2:58 0.26 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Qe5 4.
a4 f6 5. Rd1 Rd8 <HT>
14-> 6:21 0.26 1. Qxb6 Rg8 2. Qe3 d4 3. Qf3 Qe5 4.
a4 f6 5. Rd1 Rd8 <HT>
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