rnbq1b1r/Np1pp1pp/5nk1/2p2p2/1P6/B7/P1PPPPPP/2RQKBNR b K - 4 6
FEN state: rnbq1b1r/Np1pp1pp/5nk1/2p2p2/1P6/B7/P1PPPPPP/2RQKBNR b K - 4 6 ; Best move: a8a7
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black bishop at f8 and black rook at h8. White knight at a7, black pawn at b7, black pawn at d7, black pawn at e7, black pawn at g7 and black pawn at h7. Black knight at f6 and black king at g6. Black pawn at c5 and black pawn at f5. White pawn at b4. White bishop at a3. White pawn at a2, white pawn at c2, white pawn at d2, white pawn at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at c1, 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 4. Full move number is 6. Black to move.