Solution:
1.Sc3-d1 ! threat:
2.Bc4-b3 zugzwang.
2...Ka1-b1
3.Rb4-c4 zugzwang.
3...Kb1-a1
4.Rc4-c1 #
2.Bc4-d3 threat:
3.Rb4-b3 threat:
4.Rb3-a3 #
2.Bc4-g8 zugzwang.
2...Ka1-b1
3.Rb4-c4 zugzwang.
3...Kb1-a1
4.Rc4-c1 #
3...Kb1-a2
4.Rc4-c1 #
2.Bc4-f7 zugzwang.
2...Ka1-b1
3.Rb4-c4 zugzwang.
3...Kb1-a1
4.Rc4-c1 #
3...Kb1-a2
4.Rc4-c1 #
2.Bc4-e6 zugzwang.
2...Ka1-b1
3.Rb4-c4 zugzwang.
3...Kb1-a1
4.Rc4-c1 #
3...Kb1-a2
4.Rc4-c1 #
2.Bc4-d5 zugzwang.
2...Ka1-b1
3.Rb4-c4 zugzwang.
3...Kb1-a1
4.Rc4-c1 #
3...Kb1-a2
4.Rc4-c1 #
2.Rb4-b3 threat:
3.Bc4-d3 threat:
4.Rb3-a3 #
2...Ka1-b1
3.Rb3-c3 zugzwang.
3...Kb1-a1
4.Rc3-c1 #
2.Sd1-e3 zugzwang.
2...Ka1-b1
3.Sb2-d3 +
3...Kb1-a1
4.Se3-c2 #
1...Ka1-b1
2.Bc4-d3 +
2...Kb1-a2
3.Rb4-b3 threat:
4.Rb3-a3 #
2...Kb1-c1
3.Sb2-c4 threat:
4.Rb4-b1 #
2...Kb1-a1
3.Rb4-b3 threat:
4.Rb3-a3 #
References:
-
Valery Smirnov Miniature Moremovers Collection (pgn)
[Event "??????????-55 ???.???."]
[Site "?"]
[Date "1997.??.??"]
[Round "?"]
[White "?.??????? 4#"]
[Black "[+0112.10a4a1"]
[Result "*"]
[SetUp "1"]
[FEN "8/8/8/8/KRB5/2N5/1N2P3/k7 w - - 0 1"]
[PlyCount "7"]
[EventDate "1997.??.??"]
1. Ncd1 Kb1 2. Bd3+ Kc1 (2... Ka1 3. Rb3 Ka2 4. Ra3#) 3. Nc4 Kxd1 4. Rb1# *
-
Klaus-Peter Zuncke Miniatures Database (pgn)
[Event "JT Scheltonoschko-55 "]
[Site "?"]
[Date "1997.??.??"]
[Round "?"]
[White "Simonow, Walentin"]
[Black "?"]
[Result "*"]
[Annotator "4# -87665-"]
[SetUp "1"]
[FEN "8/8/8/8/KRB5/2N5/1N2P3/k7 w - - 0 1"]
[PlyCount "7"]
[SourceDate "2005.01.01"]
{T12S anto eE ,} 1. Ncd1 Kb1 2. Bd3+ Kc1 (2... Ka1 3. Rb3 Ka2 4. Ra3#) 3.
Nc4 Kxd1 4. Rb1# *
-
Gabriel Török Fourmovers Collection (csv)
"SIMONOV VALENTIN";"ŽELTONOŽKO-55 JT";1997;"?.u";"4x";"Jcd1";"a4";;"b4";;"b2";"c3";"c4";;"e2";;;;;;;;"a1";;;;;;;;;;;;;;;
