[fen]
1k6/pbpn2N1/1p2p1q1/6p1/1P5p/P1P1P2P/1B3QP1/6K1 w - - 0 1
[/fen]
答案:
[pgn]
[Event "Tasc Chess Tutor"]
[Site "?"]
[Date "2015.07.22"]
[Round "?"]
[White "White"]
[Black "Black"]
[Result "*"]
[ChessCat "CHESSCAT 1.0"]
[FEN "1k6/pbpn2N1/1p2p1q1/6p1/1P5p/P1P1P2P/1B3QP1/6K1 w - - 0 1"]
[PlyCount "1"]
[Setup "1"]

1. c4 *

[/pgn]