r1qk1b1r/p1p1pp2/n2p3p/1p3np1/PPP2P2/N6P/3P4/1RBKQBNR b - - 4 12
FEN state: r1qk1b1r/p1p1pp2/n2p3p/1p3np1/PPP2P2/N6P/3P4/1RBKQBNR b - - 4 12 ; Best move: b5a4
The current state of the chess board is: Black rook at a8, black queen at c8, black king at d8, 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 pawn at d6 and black pawn at h6. Black pawn at b5, black knight at f5 and black pawn at g5. White pawn at a4, white pawn at b4, white pawn at c4 and white pawn at f4. White knight at a3 and white pawn at h3. White pawn at d2. White rook at b1, white bishop at c1, white king at d1, white queen at e1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 12. Black to move.