Author: Dann Corbit
Date: 19:17:58 10/12/99
Go up one level in this thread
On October 12, 1999 at 20:56:46, Jeremiah Penery wrote:
[snip]
>Is this really a draw, or can White improve?
Just for fun, move to the suggested square, and let black take a turn:
6k1/1R6/6Pp/3rbp1P/1P3B2/5K2/8/8 b - -
After just a few seconds, things look bleak for black:
pondering enabled.
play best book line after search.
PFGA: EPD record: 1
end-game phase
clearing hash tables
time surplus 0.00 time limit 600:00 (600:00)
nss depth time score variation (1)
Black(0): exit
9 0.59 -- 1. ... Rd3+
9 0.96 -4.81 1. ... Rd3+ 2. Ke2 Rd4 3. Bxh6 Rh4
4. Re7 Rh2+ 5. Kd3 Rh3+ 6. Kc2 Rh2+
7. Bd2 Bg7
9-> 1.39 -4.81 1. ... Rd3+ 2. Ke2 Rd4 3. Bxh6 Rh4
4. Re7 Rh2+ 5. Kd3 Rh3+ 6. Kc2 Rh2+
7. Bd2 Bg7
10 1.74 -- 1. ... Rd3+
10 2.64 -5.58 1. ... Rd3+ 2. Ke2 Rd4 3. Bxh6 Re4+
4. Kf3 Bd6 5. Rg7+ Kh8 6. Rf7 Kg8 7.
b5 Be7
10 3.20 ++ 1. ... Bxf4!!
10 4.96 -4.85 1. ... Bxf4 2. Kxf4 Rd2 3. Kxf5 Rf2+
4. Ke6 Re2+ 5. Kf6 Rf2+ 6. Ke5 Re2+
7. Kf4 Rh2 8. Kg4 Re2
10-> 5.53 -4.85 1. ... Bxf4 2. Kxf4 Rd2 3. Kxf5 Rf2+
4. Ke6 Re2+ 5. Kf6 Rf2+ 6. Ke5 Re2+
7. Kf4 Rh2 8. Kg4 Re2
11 6.79 -4.82 1. ... Bxf4 2. Kxf4 Rd2 3. Kxf5 Rf2+
4. Ke6 Re2+ 5. Kf6 Rf2+ 6. Ke5 Re2+
7. Kf4 Rf2+ 8. Kg4 Rg2+ 9. Kh4 Kf8
10. Rd7
11-> 7.76 -4.82 1. ... Bxf4 2. Kxf4 Rd2 3. Kxf5 Rf2+
4. Ke6 Re2+ 5. Kf6 Rf2+ 6. Ke5 Re2+
7. Kf4 Rf2+ 8. Kg4 Rg2+ 9. Kh4 Kf8
10. Rd7
12 15.16 -- 1. ... Bxf4
12 22.22 -4.74 1. ... Bxf4 2. Kxf4 Rd1 3. b5 Rd5 4.
Rh7 Rxb5 5. Rxh6 Rb6 6. Rh7 Rf6 7.
Re7 Rd6
12-> 24.14 -4.74 1. ... Bxf4 2. Kxf4 Rd1 3. b5 Rd5 4.
Rh7 Rxb5 5. Rxh6 Rb6 6. Rh7 Rf6 7.
Re7 Rd6
13 32.08 -4.83 1. ... Bxf4 2. Kxf4 Rd1 3. b5 Rd5 4.
Rh7 Rxb5 5. Rxh6 Rb1 6. Kxf5 Rf1+ 7.
Ke4 Re1+ 8. Kd3 Kg7 9. Rh7+ Kf6
13-> 37.25 -4.83 1. ... Bxf4 2. Kxf4 Rd1 3. b5 Rd5 4.
Rh7 Rxb5 5. Rxh6 Rb1 6. Kxf5 Rf1+ 7.
Ke4 Re1+ 8. Kd3 Kg7 9. Rh7+ Kf6
14 51.24 -- 1. ... Bxf4
14 2:14 -5.23 1. ... Bxf4 2. Kxf4 Rd1 3. Rh7 Rf1+
4. Ke5 f4 5. Rxh6 Rb1 6. Kxf4 Rxb4+
7. Kg5 Rb5+ 8. Kf6 Rb6+ 9. Ke5 Rb5+
10. Kd6 <HT>
14-> 2:39 -5.23 1. ... Bxf4 2. Kxf4 Rd1 3. Rh7 Rf1+
4. Ke5 f4 5. Rxh6 Rb1 6. Kxf4 Rxb4+
7. Kg5 Rb5+ 8. Kf6 Rb6+ 9. Ke5 Rb5+
10. Kd6 <HT>
I am going to let it pound all night, and we'll see what it looks like in the
morning. Now, it is quite likely that crafty will misdiagnose, since the
position is described as "mutual zugzwang." Further, there are still a lot of
pieces on the board, so the null move checking will be in full force.
Therefore, it may take a program like Rebel or some other non-null mover to find
out the true story.
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