Author: Kurt Utzinger
Date: 14:18:32 06/01/03
Go up one level in this thread
On June 01, 2003 at 17:08:46, Art Basham wrote:
>Some of my engines are having trouble finding...
>1 Bf6...!
>
>[D]r2b1rk1/2q2p1p/p3b2Q/1pn3B1/4Pp2/P1NB4/1PP3PP/R4R1K w - - 0 1
>
>The old CM4000 does find it at 7 ply in about 6 min. ...:-)
>
>Hiarcs found it right away at only 3 ply...!
>
>I see the new Rebel 12 has "problems" with this one too,
>but, believe it or not, it looks like the older versions of Rebel do better
>here...
>
>art
Hi Art
As you can see from the following analysis,
Rebel 12 Beta1 needs only 5 seconds to announce
mate in 6 moves with 1.Bf6
Kurt
Thinking....
+---+---+---+---+---+---+---+---+ Pos 1 - End 1
8 | *R| | | *B| | *R| *K| |
+---+---+---+---+---+---+---+---+ 00:05:00 00:05:00
7 | | | *Q| | | *p| | *p|
+---+---+---+---+---+---+---+---+
6 | *p| | | | *B| | | Q | Time fixed:
+---+---+---+---+---+---+---+---+ Hash 28 Mb
5 | | *p| *N| | | | B | | Engine Beta 1
+---+---+---+---+---+---+---+---+ Personality beta1.eng
4 | | | | | p | *p| | | anti-GM Off
+---+---+---+---+---+---+---+---+ Tactics Off
3 | p | | N | B | | | | | Bluff Chess Off
+---+---+---+---+---+---+---+---+ Style Normal
2 | | p | p | | | | p | p | Strength Strongest
+---+---+---+---+---+---+---+---+ Search Nullmove
1 | R | | | | | R | | K |
+---+---+---+---+---+---+---+---+
a b c d e f g h
r2b1rk1/2q2p1p/p3b2Q/1pn3B1/4Pp2/P1NB4/1PP3PP/R4R1K w - -
[Event "?"]
[Site "?"]
[Date "??.??.????"]
[Round "?"]
[White "Player"]
[Black "Rebel 12"]
[Result "*"]
[WhiteElo "?"]
[BlackElo "?"]
[FEN "r2b1rk1/2q2p1p/p3b2Q/1pn3B1/4Pp2/P1NB4/1PP3PP/R4R1K w - - 0 1"]
1.*
00:00:00 1.00 2.20 1.Bxd8 Raxd8 2.Rxf4 Nxd3 3.cxd3 Rxd3
00:00:00 1.03 2.98 1.Bxf4
00:00:00 1.05 3.64 1.Rxf4
00:00:00 2.00 2.56 1.Rxf4 Bxg5 2.Qxg5+ Kh8 3.Qf6+ Kg8
00:00:00 2.03 2.70 1.Bxf4 Qe7
00:00:00 2.05 2.73 1.a4 f6 2.Bxf4
00:00:00 3.00 2.47 1.a4 Nxd3 2.cxd3 Qc5 3.Bxf4
00:00:00 3.01 2.47 1.Bxf4
00:00:00 3.01 4.23 1.Bxf4 Qe7 2.Be5
00:00:00 4.00 3.22 1.Bxf4 Qe7 2.Be5 Qg5
00:00:00 5.00 3.08 1.Bxf4 Qe7 2.Rf3 f6 3.Rg3 Kh8
00:00:00 6.00 3.08 1.Bxf4 Qe7 2.Rf3 f6 3.Rg3 Kh8
00:00:01 7.00 4.64 1.Bxf4 Qa7 2.Be3 Bb6 3.Qg5 Kh8
00:00:01 8.00 4.45 1.Bxf4 Qb6 2.Bd6 Re8 3.Bxc5 Qxc5 4.e5
f5 5.exf6 Ra7 6.f7 (1)
00:00:03 9.00 5.04 1.Bxf4 Qd7 2.Bd6 Bb6 3.Bxc5 Bxc5 4.Qg5
Kh8 5.Qxc5 (3)
00:00:04 9.15 5.04 1.Bf6
00:00:05 9.15 5.04 1.Bf6
00:00:05 9.15 Mate in 6 moves 1.Bf6 Bxf6 2.e5 Bf5 3.Bxf5 Rfd8 4.Qxh7
Kf8 5.exf6 Rac8 6.Qh8 (5)
Positions : 3.383.368
Nodes per second : 676.673
Extensions (checks) : 0 (0%)
Extensions (captures) : 0 (0%)
Extensions (king safety) : 0 (0%)
Extensions (on depth) : 0 (0%)
Extensions (remaining) : 0 (0%)
Extensions (total) : 0 (0%)
Hash Table : 65.534 55.447 (19%)
Average depth : 10
Deepest depth : 39
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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