r2q2kr/pbppb3/4p3/2P1nPpp/P3P2P/Nn3P1N/1P3K1R/1RB2B2 b - - 2 18
FEN state: r2q2kr/pbppb3/4p3/2P1nPpp/P3P2P/Nn3P1N/1P3K1R/1RB2B2 b - - 2 18 ; Best move: g5g4
The current state of the chess board is: Black rook at a8, black queen at d8, black king at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black pawn at c7, black pawn at d7 and black bishop at e7. Black pawn at e6. White pawn at c5, black knight at e5, white pawn at f5, black pawn at g5 and black pawn at h5. White pawn at a4, white pawn at e4 and white pawn at h4. White knight at a3, black knight at b3, white pawn at f3 and white knight at h3. White pawn at b2, white king at f2 and white rook at h2. White rook at b1, white bishop at c1 and white bishop at f1. Both players have exhausted their castles. Half move number is 2. Full move number is 18. Black to move.