r1bqk1nr/pppp2p1/7p/4pp2/PbB1n1Q1/3PP2N/1PPN1PPP/R1B2K1R b - - 4 10
FEN state: r1bqk1nr/pppp2p1/7p/4pp2/PbB1n1Q1/3PP2N/1PPN1PPP/R1B2K1R b - - 4 10 ; Best move: f5g4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at d7 and black pawn at g7. Black pawn at h6. Black pawn at e5 and black pawn at f5. White pawn at a4, black bishop at b4, white bishop at c4, black knight at e4 and white queen at g4. White pawn at d3, white pawn at e3 and white knight at h3. White pawn at b2, white pawn at c2, white knight at d2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white bishop at c1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 10. Black to move.