1nN1kb1r/2p1p1pp/2b5/rR6/P1P1ppPP/8/3P1K2/2nQ1B1R w k - 1 20
FEN state: 1nN1kb1r/2p1p1pp/2b5/rR6/P1P1ppPP/8/3P1K2/2nQ1B1R w k - 1 20 ; Best move: b5a5
The current state of the chess board is: Black knight at b8, white knight at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at c7, black pawn at e7, black pawn at g7 and black pawn at h7. Black bishop at c6. Black rook at a5 and white rook at b5. White pawn at a4, white pawn at c4, black pawn at e4, black pawn at f4, white pawn at g4 and white pawn at h4. White pawn at d2 and white king at f2. Black knight at c1, 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 1. Full move number is 20. White to move.