rn1qk3/p1p2prp/1p3p2/4P1pn/2PNQ1P1/7P/P2K1P2/1RB2B1R b q - 0 18
FEN state: rn1qk3/p1p2prp/1p3p2/4P1pn/2PNQ1P1/7P/P2K1P2/1RB2B1R b q - 0 18 ; Best move: f6e5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8 and black king at e8. Black pawn at a7, black pawn at c7, black pawn at f7, black rook at g7 and black pawn at h7. Black pawn at b6 and black pawn at f6. White pawn at e5, black pawn at g5 and black knight at h5. White pawn at c4, white knight at d4, white queen at e4 and white pawn at g4. White pawn at h3. White pawn at a2, white king at d2 and white pawn at f2. White rook at b1, white bishop at c1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 18. Black to move.