rnb1kbn1/pp1p2pr/2p5/1q2pp1p/2P1PQ2/2N2P1P/PP1PNKP1/R1B2B1R b q - 1 11
FEN state: rnb1kbn1/pp1p2pr/2p5/1q2pp1p/2P1PQ2/2N2P1P/PP1PNKP1/R1B2B1R b q - 1 11 ; Best move: b5b6
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at d7, black pawn at g7 and black rook at h7. Black pawn at c6. Black queen at b5, black pawn at e5, black pawn at f5 and black pawn at h5. White pawn at c4, white pawn at e4 and white queen at f4. White knight at c3, white pawn at f3 and white pawn at h3. White pawn at a2, white pawn at b2, white pawn at d2, white knight at e2, white king at f2 and white pawn at g2. White rook at a1, white bishop at c1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 11. Black to move.