Author: Dann Corbit
Date: 12:10:15 04/04/02
Go up one level in this thread
On April 04, 2002 at 14:44:10, Art Basham wrote:
>White mates in 7 moves by
>
>1.Kb2, c3, d4, e5, etc. all the way up to g7...and then mates with the
>lonely knight at h1...!
>A rather unique puzzle from the
>"Fireside Book of Chess"...
>
>[D]3B4/7p/p6P/p5p1/7k/8/P5P1/K2B3N w - -
>
>I do not know if a chess program can "see" this or not...,
>but it is worth a try.... :-)
Unfortunately, Beowulf gets confused by another checkmating move.
Position 1 - White to play
--------------------------
ID =
FEN = 3B4/7p/p6P/p5p1/7k/8/P5P1/K2B3N w - -
. . . B . . . .
. . . . . . . p
p . . . . . . P
p . . . . . p .
. . . . . . . k
. . . . . . . .
P . . . . . P .
K . . B . . . N
Current Position = 9.30
Number of Possible Moves = 21
7 1242! 64 98457 Bf3 a4 Nf2 Kg3 Ne4+ Kf4 Nxg5 Kg3 Nxh7
7 1242 66 100152 Bf3 a4 Nf2 Kg3 Ne4+ Kf4 Nxg5 Kg3 Nxh7
8 1260 94 149724 Bf3 a4 Nf2 Kg3 Ne4+ Kf4 Nxg5 Kg3 Bc7+ Kf2 Nxh7
8 1425! 100 162964 Bxa5 g4 Bd8+ Kh5 Be2 Kxh6 Bxa6 Kg6 Bb5 h5
8 1448 103 168151 Bxa5 g4 Bd8+ Kh5 Be2 Kxh6 Bxa6 Kg7 Bc4 h5
9 1456 253 505099 Bxa5 g4 Bd8+ Kh5 Be2 Kxh6 Bxa6 Kg7 Bc4 h5 Ng3
9 1563! 259 517380 Bf3 a4 g3+ Kh3 Bxg5 Kh2 Bf4 a5 g4+ Kh3 g5 Kh4
9 1580 272 547237 Bf3 a4 g3+ Kh3 Bxg5 Kh2 Bf4 a5 g4+ Kh3 Nf2+ Kh4
g5 a3
10 1594 599 1446862 Bf3 a4 g3+ Kh3 Bxg5 Kh2 Bf4 a5 g4+ Kh3 Nf2+ Kh4
g5 a3 Ne4
11 1595 1806 5069838 Bf3 a4 g3+ Kh3 Bxg5 Kh2 Bf4 a5 g4+ Kh3 Nf2+ Kh4
Ne4 Kh3 g5 Kh4
11 1626! 2716 7778232 g3+ Kh3 Bxg5 Kg2 Bc2 Kf3 Bxh7 a4 Bg6 Ke2 Bf4 Kf3
11 1649 3708 10803366 g3+ Kh3 Bxa5 Kg2 Bc2 Kxh1 Bxh7 Kh2 Bg6 g4 h7 Kxg
3 h8q Kf3
12 1678! 5257 15338969 g3+ Kh3 Bxa5 g4 Bc2 Kg2 Bxh7 Kf3 Be4+ Ke2 h7 Kf1
Bd5 Ke2 h8q Kd3
12 1706 9987 29282223 g3+ Kh3 Bf3 a4 Kb1 a5 Bc7 g4 Nf2+ Kh2 Nxg4+ Kh3
Nf2+ Kh2 g4+ Kg1 Nh3+ Kf1 Ng5 Kf2 Kb2 a3+ Kxa3 a4 Nxh7
12 1772 10938 32156089 Bxa5 g4 Bd2 a5 Bc2 a4 Bxa4 g3 Bc2 Kg4 Nxg3 Kh4 B
xh7 Kxg3
12 Mate15 13956 40983214 Bc7 g4 Bf4 Kh5 Bc2 g3 Bf5 a4 Nxg3+ Kh4 Ne4 a5 g3
+ Kh5 Nf6#
Search Time : 153.6 Seconds
Total Nodes Searched : 44916190 (71.4% Qui)
Total Nodes Evaluated : 32058436
Cuts : Delta 2354913 : SEE 44056 : Mate 0
: Razor 9486915 : Eval 27568220
Extensions : Check 2770369 : OneRep 76951 : CMThreat 5371
: Pawn 69309 : Recap 5601 : RevCheck 73225
Hash Stores (Size) : 4742024 (8388593)
Hash Probes (Hits) : 26166475 (11269341)
EGTB Probes (Hits) : 14 (14)
Move Ordering : 98.4%
Best Move = Bc7
--Answer: Kb2 ** Alternative CM Found **
Time To Solution = 139.56 sec
Correct So Far : 1/1
Chest confirms the mate in 7:
3B4/7p/p6P/p5p1/7k/8/P5P1/K2B3N w - - acn 2103907; acs 14; bm Kb2; ce 32754; dm
7; pv Kb2 a4 Kc3 a3 Kd4 a5 Ke5 a4 Kf6 g4 Kg7+ Kh5 Ng3#;
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