Author: Robert Hyatt
Date: 08:46:48 11/16/00
Go up one level in this thread
On November 16, 2000 at 11:18:13, Howard Exner wrote:
>On November 16, 2000 at 05:38:30, allan johnson wrote:
>
>>On November 16, 2000 at 05:34:46, allan johnson wrote:
>>>sorry thats a white pawn on h3
>> Imust be on drugs or something Sorry
>> [D]1R6/2pk4/1P6/8/3r4/K7/P7/8 w - -
>
>This position Tiger finds immediately (both Tiger13 and Gambit, since the
>endgame play for these two is identical - as it should be). Tiger has some smart
>passed pawn code for these kinds of positions.
>
>Century 3 misses this one as it does not extend enough. After a few forced moves
>when the black rook is captured it extends to see an immediate win. Why not
>extend more when the rooks are still on? An overall performance hit?
>
>Table base programs should find this in a snap but again we see an example of a
>non table base program (Tiger) finding it (I'm sure they'll be others). In a
>previous post for the Ne4 position it was Century's turn to shine while Tiger
>faltered.
Here is my results:
nss depth time score variation (1)
1 0.00 1.96 1. Rb7
1-> 0.01 1.96 1. Rb7
2 0.01 1.66 1. Rb7 Kc6
2 0.01 ++ 1. b7!!
2 0.01 2.34 1. b7 Kc6 2. Kb3
2-> 0.01 2.34 1. b7 Kc6 2. Kb3
3 0.02 2.04 1. b7 Kc6 2. Kb3 Rd2
3-> 0.04 2.04 1. b7 Kc6 2. Kb3 Rd2
4 0.05 2.14 1. b7 Kc6 2. Kb3 Rd3+ 3. Kc4 Rd2
4-> 0.07 2.14 1. b7 Kc6 2. Kb3 Rd3+ 3. Kc4 Rd2
5 0.33 2.16 1. b7 Kc6 2. Kb3 Rd1 3. Kc3 Kc5
5 0.44 ++ 1. Rd8+!!
5 0.47 3.12 1. Rd8+ Kxd8 2. b7 Rd3+ 3. Kb2 Rd2+
4. Kc3 Rxa2 5. b8=Q+ Kd7
(2) 5-> 0.50 3.12 1. Rd8+ Kxd8 2. b7 Rd3+ 3. Kb2 Rd2+
4. Kc3 Rxa2 5. b8=Q+ Kd7
6 0.77 3.50 1. Rd8+ Kxd8 2. b7 c5 3. b8=Q+ Kd7
4. Qb6 Rd3+ 5. Ka4 c4
6-> 0.82 3.50 1. Rd8+ Kxd8 2. b7 c5 3. b8=Q+ Kd7
4. Qb6 Rd3+ 5. Ka4 c4
7 0.85 3.68 1. Rd8+ Kxd8 2. b7 Kd7 3. b8=Q Kc6
4. Qb2 Kd5 5. Kb3
7-> 0.93 3.68 1. Rd8+ Kxd8 2. b7 Kd7 3. b8=Q Kc6
4. Qb2 Kd5 5. Kb3
8 1.13 3.70 1. Rd8+ Kxd8 2. b7 Kd7 3. b8=Q c5 4.
Qb6 <HT>
8-> 1.43 3.70 1. Rd8+ Kxd8 2. b7 Kd7 3. b8=Q c5 4.
Qb6 <HT>
9 1.64 3.87 1. Rd8+ Kxd8 2. b7 Kd7 3. b8=Q Kc6
4. Kb3 Rd1 5. Qe8+ Kb6 6. Qe6+ c6 7.
a4
9-> 1.80 3.87 1. Rd8+ Kxd8 2. b7 Kd7 3. b8=Q Kc6
4. Kb3 Rd1 5. Qe8+ Kb6 6. Qe6+ c6 7.
a4
10 2.58 3.93 1. Rd8+ Kxd8 2. b7 Rd3+ 3. Kb2 Kd7
4. b8=Q Rd6 5. Qb5+ c6 6. Qf5+ Kc7
7. Qa5+ Kd7 8. Qa7+ Ke6 9. Qc5
...
12 7.75 4.15 1. Rd8+ Kxd8 2. b7 Rd6 3. b8=Q+ Kd7
4. Qb5+ Kd8 5. Qc5 Rb6 6. Ka4 Kd7 7.
Qd5+ Kc8 8. Ka5 Rd6 9. Qc5
12-> 9.16 4.15 1. Rd8+ Kxd8 2. b7 Rd6 3. b8=Q+ Kd7
4. Qb5+ Kd8 5. Qc5 Rb6 6. Ka4 Kd7 7.
Qd5+ Kc8 8. Ka5 Rd6 9. Qc5
13 14.72 4.23 1. Rd8+ Kxd8 2. b7 Rd6 3. b8=Q+ Kd7
4. Qb5+ Kd8 5. Qg5+ Kc8 6. Kb4 Kb7
7. Qg2+ c6 8. Qg7+ Kb6 9. Qe5 Rd5 10.
Qb8+ Ka6 11. a4 c5+ 12. Kc4
13-> 16.92 4.23 1. Rd8+ Kxd8 2. b7 Rd6 3. b8=Q+ Kd7
4. Qb5+ Kd8 5. Qg5+ Kc8 6. Kb4 Kb7
7. Qg2+ c6 8. Qg7+ Kb6 9. Qe5 Rd5 10.
Qb8+ Ka6 11. a4 c5+ 12. Kc4
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