2b1kb1r/1nq2Np1/r1ppp3/pp6/1P5p/BNP3p1/P2PPnKP/R2QR3 b k - 5 20
FEN state: 2b1kb1r/1nq2Np1/r1ppp3/pp6/1P5p/BNP3p1/P2PPnKP/R2QR3 b k - 5 20 ; Best move: c7f7
The current state of the chess board is: Black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black knight at b7, black queen at c7, white knight at f7 and black pawn at g7. Black rook at a6, black pawn at c6, black pawn at d6 and black pawn at e6. Black pawn at a5 and black pawn at b5. White pawn at b4 and black pawn at h4. White bishop at a3, white knight at b3, white pawn at c3 and black pawn at g3. White pawn at a2, white pawn at d2, white pawn at e2, black knight at f2, white king at g2 and white pawn at h2. White rook at a1, white queen at d1 and white rook at e1. Black kingside is the only castle move available. Half move number is 5. Full move number is 20. Black to move.