1rb5/pp1kp2p/nqp3rP/P2p4/1P5P/2PPnN1R/QB2P3/RN2KB2 b Q - 2 20
FEN state: 1rb5/pp1kp2p/nqp3rP/P2p4/1P5P/2PPnN1R/QB2P3/RN2KB2 b Q - 2 20 ; Best move: b6c7
The current state of the chess board is: Black rook at b8 and black bishop at c8. Black pawn at a7, black pawn at b7, black king at d7, black pawn at e7 and black pawn at h7. Black knight at a6, black queen at b6, black pawn at c6, black rook at g6 and white pawn at h6. White pawn at a5 and black pawn at d5. White pawn at b4 and white pawn at h4. White pawn at c3, white pawn at d3, black knight at e3, white knight at f3 and white rook at h3. White queen at a2, white bishop at b2 and white pawn at e2. White rook at a1, white knight at b1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 2. Full move number is 20. Black to move.