1nbqkb1r/2r1p1pp/B2p4/1pp1Pp2/8/N1PP4/PP1BQPPn/2RK2NR w k - 0 12
FEN state: 1nbqkb1r/2r1p1pp/B2p4/1pp1Pp2/8/N1PP4/PP1BQPPn/2RK2NR w k - 0 12 ; Best move: a6b5
The current state of the chess board is: Black knight at b8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black rook at c7, black pawn at e7, black pawn at g7 and black pawn at h7. White bishop at a6 and black pawn at d6. Black pawn at b5, black pawn at c5, white pawn at e5 and black pawn at f5. White knight at a3, white pawn at c3 and white pawn at d3. White pawn at a2, white pawn at b2, white bishop at d2, white queen at e2, white pawn at f2, white pawn at g2 and black knight at h2. White rook at c1, white king at d1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 12. White to move.