Solution:
1.Se2-d4 ! threat:
2.Sd2-e4 threat:
3.Sf2-d3 threat:
4.Se4-c3 #
References:
-
Valery Smirnov Miniature Moremovers Collection (pgn)
[Event "?? ??????????-60 2 ???.???."]
[Site "?"]
[Date "2002.??.??"]
[Round "?"]
[White "I.Dulbergs 4#"]
[Black "[+0009.00g2a2"]
[Result "*"]
[SetUp "1"]
[FEN "8/8/8/8/8/8/k1NNNNK1/8 w - - 0 1"]
[PlyCount "7"]
[EventDate "2002.??.??"]
1. Ned4 Kb2 2. Nde4 Kc1 3. Nd3+ Kb1 4. Nc3# *
-
Klaus-Peter Zuncke Miniatures Database (pgn)
[Event "Uralski problemist "]
[Site "?"]
[Date "2003.01.??"]
[Round "33"]
[White "Dulbergs, Imants"]
[Black "?"]
[Result "1/2-1/2"]
[Annotator "4# -6666-"]
[SetUp "1"]
[FEN "8/8/8/8/8/8/k1NNNNK1/8 w - - 0 1"]
[PlyCount "7"]
[SourceDate "2005.01.01"]
{A12SS16 ASb4 = Scheltoschko-60 2.eE .} 1. Ned4 Kb2 2. Nde4 Kc1 3. Nd3+ Kb1
4. Nc3# 1/2-1/2
-
Alexandr Sygurov Collection (pgn)
[Event "YK V.Zheltonozhko, 2 BV"]
[Site "?"]
[Date "2003.??.??"]
[Round "?"]
[White "Dulbergs Imants"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/8/8/8/8/8/k1NNNNK1/8 w - - 0 1"]
[PlyCount "7"]
[EventDate "2003.??.??"]
1. Ned4 Kb2 2. Nde4 Kc1 (2... Ka2 3. Nd3 Kb1 4. Nc3#) (2... Kb1 3. Nd3 Ka2 4.
Nc3#) 3. Nd3+ Kb1 4. Nc3# *
