1r1qkb1r/p1p1pp2/n1b2n2/3p1p2/1P1P1P2/N5PP/1PP1P3/R1B1KBNR b KQk - 0 12
FEN state: 1r1qkb1r/p1p1pp2/n1b2n2/3p1p2/1P1P1P2/N5PP/1PP1P3/R1B1KBNR b KQk - 0 12 ; Best move: a6b4
The current state of the chess board is: Black rook at b8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at e7 and black pawn at f7. Black knight at a6, black bishop at c6 and black knight at f6. Black pawn at d5 and black pawn at f5. White pawn at b4, white pawn at d4 and white pawn at f4. White knight at a3, white pawn at g3 and white pawn at h3. White pawn at b2, white pawn at c2 and white pawn at e2. White rook at a1, white bishop at c1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside, white queenside and black kingside castles are available. Half move number is 0. Full move number is 12. Black to move.