r1bk1br1/p1p2ppp/4p2n/1P1p4/1P1nP1Pq/2N2P2/2PKN2P/R1BQ1B1R b - - 2 10
FEN state: r1bk1br1/p1p2ppp/4p2n/1P1p4/1P1nP1Pq/2N2P2/2PKN2P/R1BQ1B1R b - - 2 10 ; Best move: d4f3
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8, black bishop at f8 and black rook at g8. Black pawn at a7, black pawn at c7, black pawn at f7, black pawn at g7 and black pawn at h7. Black pawn at e6 and black knight at h6. White pawn at b5 and black pawn at d5. White pawn at b4, black knight at d4, white pawn at e4, white pawn at g4 and black queen at h4. White knight at c3 and white pawn at f3. White pawn at c2, white king at d2, white knight at e2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 10. Black to move.