2bk2nr/rpbq2p1/n3pp1p/p7/P5P1/2Pp3B/1P1B1P1N/RN2KQ1R b K - 1 20
FEN state: 2bk2nr/rpbq2p1/n3pp1p/p7/P5P1/2Pp3B/1P1B1P1N/RN2KQ1R b K - 1 20 ; Best move: a6c5
The current state of the chess board is: Black bishop at c8, black king at d8, black knight at g8 and black rook at h8. Black rook at a7, black pawn at b7, black bishop at c7, black queen at d7 and black pawn at g7. Black knight at a6, black pawn at e6, black pawn at f6 and black pawn at h6. Black pawn at a5. White pawn at a4 and white pawn at g4. White pawn at c3, black pawn at d3 and white bishop at h3. White pawn at b2, white bishop at d2, white pawn at f2 and white knight at h2. White rook at a1, white knight at b1, white king at e1, white queen at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 20. Black to move.