rnb1kb2/p2p3r/4pp1p/qpp5/1PnP1PPp/3QB2N/P3P3/RN2KB1R b q - 3 18
FEN state: rnb1kb2/p2p3r/4pp1p/qpp5/1PnP1PPp/3QB2N/P3P3/RN2KB1R b q - 3 18 ; Best move: a5b4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at d7 and black rook at h7. Black pawn at e6, black pawn at f6 and black pawn at h6. Black queen at a5, black pawn at b5 and black pawn at c5. White pawn at b4, black knight at c4, white pawn at d4, white pawn at f4, white pawn at g4 and black pawn at h4. White queen at d3, white bishop at e3 and white knight at h3. White pawn at a2 and white pawn at e2. White rook at a1, white knight at b1, white king at e1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 3. Full move number is 18. Black to move.