rn1k4/p3npb1/bp3r2/2p1p1p1/PR2PPPp/2PP3P/5N2/2Q1KBNR b K - 2 20
FEN state: rn1k4/p3npb1/bp3r2/2p1p1p1/PR2PPPp/2PP3P/5N2/2Q1KBNR b K - 2 20 ; Best move: c5b4
The current state of the chess board is: Black rook at a8, black knight at b8 and black king at d8. Black pawn at a7, black knight at e7, black pawn at f7 and black bishop at g7. Black bishop at a6, black pawn at b6 and black rook at f6. Black pawn at c5, black pawn at e5 and black pawn at g5. White pawn at a4, white rook at b4, white pawn at e4, white pawn at f4, white pawn at g4 and black pawn at h4. White pawn at c3, white pawn at d3 and white pawn at h3. White knight at f2. White queen at c1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 2. Full move number is 20. Black to move.