r1b2knr/ppppqpb1/5Np1/5P2/3B2p1/PP5P/n1PPP3/1R1QKBNR b K - 0 13
FEN state: r1b2knr/ppppqpb1/5Np1/5P2/3B2p1/PP5P/n1PPP3/1R1QKBNR b K - 0 13 ; Best move: g7f6
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at d7, black queen at e7, black pawn at f7 and black bishop at g7. White knight at f6 and black pawn at g6. White pawn at f5. White bishop at d4 and black pawn at g4. White pawn at a3, white pawn at b3 and white pawn at h3. Black knight at a2, white pawn at c2, white pawn at d2 and white pawn at e2. White rook at b1, white queen at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 13. Black to move.