Castle early and often.
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[Event "rated untimed match"]
[Site "USSR"]
[Date "1963.??.??"]
[Round "?"]
[White "Russakow"]
[Black "Kalinkin"]
[Result "1-0"]
[BlackElo "0"]
[FEN "2rr1k2/1pqb1ppB/p1nnp3/4p1P1/7N/P1N5/1PP2QPP/4RR1K w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Ng6+ { There are two mate in 4 lines. Here is one.|Can you find the other? } ( 1. Qxf7+ Nxf7 2. Ng6+ Ke8 3. Bg8 Nxg5 4. Rf8# ) 1... Ke8 2. Qxf7+ Nxf7 3. Bg8 ( 3. Rxf7 { Black can try: } 3... Qd6 ( 3... Kxf7 4. Rf1+ Ke8 5. Rf8# ) 4. Ref1 e4 5. Rf8+ Qxf8 6. Rxf8# ) 3... e4 4. Bxf7# 1-0