1rbqkb1r/2p1p3/1p1p3n/3n1Ppp/PpPP2PP/4N2B/1B2QP1R/R3K1N1 w Q - 2 18
FEN state: 1rbqkb1r/2p1p3/1p1p3n/3n1Ppp/PpPP2PP/4N2B/1B2QP1R/R3K1N1 w Q - 2 18 ; Best move: c4d5
The current state of the chess board is: Black rook at b8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at c7 and black pawn at e7. Black pawn at b6, black pawn at d6 and black knight at h6. Black knight at d5, white pawn at f5, black pawn at g5 and black pawn at h5. White pawn at a4, black pawn at b4, white pawn at c4, white pawn at d4, white pawn at g4 and white pawn at h4. White knight at e3 and white bishop at h3. White bishop at b2, white queen at e2, white pawn at f2 and white rook at h2. White rook at a1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 2. Full move number is 18. White to move.