rnb1kbn1/p2pp3/8/qpp4r/1P2p1pp/N2PPP1P/P1P1K1P1/R1BQ1BR1 b q - 0 12
FEN state: rnb1kbn1/p2pp3/8/qpp4r/1P2p1pp/N2PPP1P/P1P1K1P1/R1BQ1BR1 b q - 0 12 ; Best move: c5b4
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 d7 and black pawn at e7. Black queen at a5, black pawn at b5, black pawn at c5 and black rook at h5. White pawn at b4, black pawn at e4, black pawn at g4 and black pawn at h4. White knight at a3, white pawn at d3, white pawn at e3, white pawn at f3 and white pawn at h3. White pawn at a2, white pawn at c2, white king at e2 and white pawn at g2. White rook at a1, white bishop at c1, white queen at d1, white bishop at f1 and white rook at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 12. Black to move.