r1bq1b1r/pNp1k3/1p1p4/2np1ppp/5PQP/PPP3P1/4B3/RNB1K1R1 w Q - 0 18
FEN state: r1bq1b1r/pNp1k3/1p1p4/2np1ppp/5PQP/PPP3P1/4B3/RNB1K1R1 w Q - 0 18 ; Best move: g4g5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at a7, white knight at b7, black pawn at c7 and black king at e7. Black pawn at b6 and black pawn at d6. Black knight at c5, black pawn at d5, black pawn at f5, black pawn at g5 and black pawn at h5. White pawn at f4, white queen at g4 and white pawn at h4. White pawn at a3, white pawn at b3, white pawn at c3 and white pawn at g3. White bishop at e2. White rook at a1, white knight at b1, white bishop at c1, white king at e1 and white rook at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 18. White to move.