1n4nr/3pkp1p/1prpP2P/p4Pp1/1P4P1/b3Pb2/P2Q3N/RNB1KB2 b Q - 0 20
FEN state: 1n4nr/3pkp1p/1prpP2P/p4Pp1/1P4P1/b3Pb2/P2Q3N/RNB1KB2 b Q - 0 20 ; Best move: a3b4
The current state of the chess board is: Black knight at b8, black knight at g8 and black rook at h8. Black pawn at d7, black king at e7, black pawn at f7 and black pawn at h7. Black pawn at b6, black rook at c6, black pawn at d6, white pawn at e6 and white pawn at h6. Black pawn at a5, white pawn at f5 and black pawn at g5. White pawn at b4 and white pawn at g4. Black bishop at a3, white pawn at e3 and black bishop at f3. White pawn at a2, white queen at d2 and white knight at h2. White rook at a1, white knight at b1, white bishop at c1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.