r2k1b1r/ppp2ppp/B1npp3/7n/qP2PPbP/P1N4N/2PP2P1/R1BQK2R b K - 2 13
FEN state: r2k1b1r/ppp2ppp/B1npp3/7n/qP2PPbP/P1N4N/2PP2P1/R1BQK2R b K - 2 13 ; Best move: a4a6
The current state of the chess board is: Black rook at a8, black king at d8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at f7, black pawn at g7 and black pawn at h7. White bishop at a6, black knight at c6, black pawn at d6 and black pawn at e6. Black knight at h5. Black queen at a4, white pawn at b4, white pawn at e4, white pawn at f4, black bishop at g4 and white pawn at h4. White pawn at a3, white knight at c3 and white knight at h3. White pawn at c2, white pawn at d2 and white pawn at g2. White rook at a1, white bishop at c1, white queen at d1, white king at e1 and white rook at h1. White kingside is the only castle move available. Half move number is 2. Full move number is 13. Black to move.