Author: Dann Corbit
Date: 22:15:37 03/06/00
Go up one level in this thread
On March 07, 2000 at 01:08:22, Jouni Uski wrote:
>[D]8/k7/8/2R5/8/4q3/8/4B2K w - -
>
>Latest version wants to play losing Kg2, when original version plays instantly
>drawing Bg3. Why? I have 3+4 piece TBs.
>
>But still Fritz solves 41/43 from my end suite (Junior6 got 37)!
Here you need the 5 piece tablebase set.
Notice in the Crafty analysis:
E:\crafty\Release>crafty1
EPD Kit revision date: 1996.04.21
unable to open book file [e:/crafty/release/book.bin].
book is disabled
unable to open book file [e:/crafty/release/books.bin].
search time set to 1800.00.
using cpu time
Crafty 17.9 vs ferret
pondering enabled.
ERROR "remfish " is unknown rc-file option
EGTB cache memory = 16M bytes.
ERROR. Minimum hash table size is 48K bytes.
pawn hash table memory = 8M bytes.
play best book line after search.
EGTB access enabled
using tbpath=e:/crafty/release/tb,F:/KBP
4 piece tablebase files found
1302kb of RAM used for TB indices and decompression tables
PFGA: EPD record: 1
end-game phase
clearing hash tables
time surplus 0.00 time limit 30:00 (30:00) [easy move]
nss depth time score variation (1)
White(1): exit
5 0.15 -Mat29 1. Bb4 Qe4+ 2. Kh2 Qxb4 <HT>
5 0.20 -Mat31 1. Rc7+ Kb6 2. Bg3 Qxg3 <HT>
5 0.21 ++ 1. Bg3!!
8 0.90 -1.81 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Bf2+ Kc4 5. Kh2 Kd3
8-> 0.98 -1.81 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Bf2+ Kc4 5. Kh2 Kd3
9 1.73 -1.81 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Kg1 Qh7 5. Bf2+ Kc4 6. Rh2
9-> 2.03 -1.81 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Kg1 Qh7 5. Bf2+ Kc4 6. Rh2
10 4.07 -1.85 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Kg1 Qb1+ 5. Kh2 Qh7+ 6. Kg1 Kd4 7.
Kf2
10-> 4.58 -1.85 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Kg1 Qb1+ 5. Kh2 Qh7+ 6. Kg1 Kd4 7.
Kf2
11 9.22 -1.85 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Kh2 Qh7+ 5. Kg1 Kd4 6. Rh2 Qb7 7. Kf2
11-> 10.40 -1.85 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Kh2 Qh7+ 5. Kg1 Kd4 6. Rh2 Qb7 7. Kf2
12 20.37 -1.85 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Kg1 Qf3 5. Bf2+ Kd5 6. Rg8 Qd1+ 7.
Kh2 Ke4 8. Kg3
12-> 23.15 -1.85 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Kg1 Qf3 5. Bf2+ Kd5 6. Rg8 Qd1+ 7.
Kh2 Ke4 8. Kg3
13 58.23 -1.93 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Kg1 Qf3 5. Bf2+ Kd5 6. Kf1 Ke4 7. Rg3
Qd1+ 8. Be1 Qa1
13-> 1:11 -1.93 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Kg1 Qf3 5. Bf2+ Kd5 6. Kf1 Ke4 7. Rg3
Qd1+ 8. Be1 Qa1
14 3:45 -1.93 1. Bg3 Kb6 2. Rc2 Qe4+ 3. Rg2 Kc5 4.
Kg1 Qf3 5. Bf2+ Kd5 6. Kf1 Ke4 7. Rg3
Qd1+ 8. Be1 Qc2 9. Bf2
14 3:45 2/23 1. Ra5+
Since there are no pieces taken clear up to ply 14, you still need the 5 piece
tablebase files. By some other means, Bg3 was chosen by crafty. But (according
to the centipawn evaluation) the draw is not seen yet.
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