2rq2n1/pbp2k1r/5p1b/nPpppP2/3NP1p1/2N3PP/PB1P4/R3KB1R b Q - 0 20
FEN state: 2rq2n1/pbp2k1r/5p1b/nPpppP2/3NP1p1/2N3PP/PB1P4/R3KB1R b Q - 0 20 ; Best move: c5d4
The current state of the chess board is: Black rook at c8, black queen at d8 and black knight at g8. Black pawn at a7, black bishop at b7, black pawn at c7, black king at f7 and black rook at h7. Black pawn at f6 and black bishop at h6. Black knight at a5, white pawn at b5, black pawn at c5, black pawn at d5, black pawn at e5 and white pawn at f5. White knight at d4, white pawn at e4 and black pawn at g4. White knight at c3, white pawn at g3 and white pawn at h3. White pawn at a2, white bishop at b2 and white pawn at d2. White rook at a1, white king at e1, white bishop at f1 and white rook at h1. White queenside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.