n2qkb1r/1bppppp1/r4n1p/pp6/1P2PP2/P2PB2P/2P1NKP1/RN1Q1B1R b k - 11 12
FEN state: n2qkb1r/1bppppp1/r4n1p/pp6/1P2PP2/P2PB2P/2P1NKP1/RN1Q1B1R b k - 11 12 ; Best move: a5b4
The current state of the chess board is: Black knight at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black bishop at b7, black pawn at c7, black pawn at d7, black pawn at e7, black pawn at f7 and black pawn at g7. Black rook at a6, black knight at f6 and black pawn at h6. Black pawn at a5 and black pawn at b5. White pawn at b4, white pawn at e4 and white pawn at f4. White pawn at a3, white pawn at d3, white bishop at e3 and white pawn at h3. White pawn at c2, white knight at e2, white king at f2 and white pawn at g2. White rook at a1, white knight at b1, white queen at d1, white bishop at f1 and white rook at h1. Black kingside is the only castle move available. Half move number is 11. Full move number is 12. Black to move.