r1bq1bn1/1pp2k2/2nppr2/p4p1p/2BPR3/NP2PPP1/PBP5/R2QK1N1 b Q - 3 16
FEN state: r1bq1bn1/1pp2k2/2nppr2/p4p1p/2BPR3/NP2PPP1/PBP5/R2QK1N1 b Q - 3 16 ; Best move: f5e4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8 and black knight at g8. Black pawn at b7, black pawn at c7 and black king at f7. Black knight at c6, black pawn at d6, black pawn at e6 and black rook at f6. Black pawn at a5, black pawn at f5 and black pawn at h5. White bishop at c4, white pawn at d4 and white rook at e4. White knight at a3, white pawn at b3, white pawn at e3, white pawn at f3 and white pawn at g3. White pawn at a2, white bishop at b2 and white pawn at c2. White rook at a1, white queen at d1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 3. Full move number is 16. Black to move.