r1q1k3/pp1nppbr/2pp1np1/1P3b1p/P4B1P/2NP1P2/2P1PKP1/R2Q1BNR b q - 4 11
FEN state: r1q1k3/pp1nppbr/2pp1np1/1P3b1p/P4B1P/2NP1P2/2P1PKP1/R2Q1BNR b q - 4 11 ; Best move: c6b5
The current state of the chess board is: Black rook at a8, black queen at c8 and black king at e8. Black pawn at a7, black pawn at b7, black knight at d7, black pawn at e7, black pawn at f7, black bishop at g7 and black rook at h7. Black pawn at c6, black pawn at d6, black knight at f6 and black pawn at g6. White pawn at b5, black bishop at f5 and black pawn at h5. White pawn at a4, white bishop at f4 and white pawn at h4. White knight at c3, white pawn at d3 and white pawn at f3. White pawn at c2, white pawn at e2, white king at f2 and white pawn at g2. White rook at a1, white queen at d1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 4. Full move number is 11. Black to move.