r1b2bn1/3k4/p1ppp2p/PP3pN1/4Q1pR/N7/PB1PPP2/R3KB2 b Q - 1 20
FEN state: r1b2bn1/3k4/p1ppp2p/PP3pN1/4Q1pR/N7/PB1PPP2/R3KB2 b Q - 1 20 ; Best move: f5e4
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8 and black knight at g8. Black king at d7. Black pawn at a6, black pawn at c6, black pawn at d6, black pawn at e6 and black pawn at h6. White pawn at a5, white pawn at b5, black pawn at f5 and white knight at g5. White queen at e4, black pawn at g4 and white rook at h4. White knight at a3. White pawn at a2, white bishop at b2, white pawn at d2, white pawn at e2 and white pawn at f2. White rook at a1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 1. Full move number is 20. Black to move.