r1bqk3/3n1pr1/6p1/1pp1P1Pp/p2pPPn1/P4B1N/1PPBQ3/RN1K3R b q - 2 18
FEN state: r1bqk3/3n1pr1/6p1/1pp1P1Pp/p2pPPn1/P4B1N/1PPBQ3/RN1K3R b q - 2 18 ; Best move: d8b6
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black king at e8. Black knight at d7, black pawn at f7 and black rook at g7. Black pawn at g6. Black pawn at b5, black pawn at c5, white pawn at e5, white pawn at g5 and black pawn at h5. Black pawn at a4, black pawn at d4, white pawn at e4, white pawn at f4 and black knight at g4. White pawn at a3, white bishop at f3 and white knight at h3. White pawn at b2, white pawn at c2, white bishop at d2 and white queen at e2. White rook at a1, white knight at b1, white king at d1 and white rook at h1. Black queenside is the only castle move available. Half move number is 2. Full move number is 18. Black to move.