Solution:
1.f4-f5 ! zugzwang.
1...c4-c3
2.Qh4-f6 threat:
3.Be6-b3 +
3...Kd6-d7
4.Bb3-a4 #
3...Kd6-c5
4.Qf6-b6 #
2...Kd6-c5
3.Qf6*c3 +
3...Kc5-b5
4.Be6-d7 #
3...Kc5-d6
4.Qc3-c7 #
1...Kd6-e5
2.Kb7-c6 threat:
3.Kc6-c5 threat:
4.Qh4-d4 #
1...Kd6-c5
2.Qh4*c4 +
2...Kc5-d6
3.Qc4-c7 #
References:
-
Valery Smirnov Miniature Moremovers Collection (pgn)
[Event "Sachova skladba"]
[Site "?"]
[Date "1997.??.??"]
[Round "?"]
[White "?.?????? 4#"]
[Black "[+1010.11b7d6"]
[Result "*"]
[SetUp "1"]
[FEN "8/1K6/3kB3/8/2p2P1Q/8/8/8 w - - 0 1"]
[PlyCount "7"]
[EventDate "1997.??.??"]
1. f5 Ke5 (1... c3 2. Qf6 c2 3. Bb3+ Kc5 (3... Kd7 4. Ba4#) 4. Qb6#) 2. Kc6 c3
3. Kc5 c2 4. Qd4# *
-
Klaus-Peter Zuncke Miniatures Database (pgn)
[Event "Sachova skladba "]
[Site "?"]
[Date "1997.04.??"]
[Round "?"]
[White "Surkow, Waleri"]
[Black "?"]
[Result "1/2-1/2"]
[Annotator "4# -9750-"]
[SetUp "1"]
[FEN "8/1K6/3kB3/8/2p2P1Q/8/8/8 w - - 0 1"]
[PlyCount "7"]
[SourceDate "2005.01.01"]
[WhiteTeam "4193"]
{A10-3L+ Echo .} 1. f5 Ke5 (1... c3 2. Qf6 c2 3. Bb3+ Kc5 (3... Kd7 4. Ba4#)
4. Qb6#) 2. Kc6 c3 3. Kc5 c2 4. Qd4# 1/2-1/2
-
Gabriel Török Fourmovers Collection (csv)
"SURKOV VALERIJ";"ŠACHOVÁ SKLADBA";1997;;"4x";;"b7";"h4";;;;;"e6";;"f4";;;;;;;;"d6";;;;;;;;"c4";;;;;;;
