r1b3nr/p2pbk2/1q2np1p/1pP3p1/P2P4/N4NP1/2P1PP1P/2BQKB1R w K - 1 15
FEN state: r1b3nr/p2pbk2/1q2np1p/1pP3p1/P2P4/N4NP1/2P1PP1P/2BQKB1R w K - 1 15 ; Best move: c5b6
The current state of the chess board is: Black rook at a8, black bishop at c8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at d7, black bishop at e7 and black king at f7. Black queen at b6, black knight at e6, black pawn at f6 and black pawn at h6. Black pawn at b5, white pawn at c5 and black pawn at g5. White pawn at a4 and white pawn at d4. White knight at a3, white knight at f3 and white pawn at g3. White pawn at c2, white pawn at e2, white pawn at f2 and white pawn at h2. White bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 15. White to move.