r2q1b2/p3k1pr/1pp1b3/1P1pQ1N1/3nPpp1/P1P5/1B1P1PPR/RN2KB2 w Q - 0 18
FEN state: r2q1b2/p3k1pr/1pp1b3/1P1pQ1N1/3nPpp1/P1P5/1B1P1PPR/RN2KB2 w Q - 0 18 ; Best move: c3d4
The current state of the chess board is: Black rook at a8, black queen at d8 and black bishop at f8. Black pawn at a7, black king at e7, black pawn at g7 and black rook at h7. Black pawn at b6, black pawn at c6 and black bishop at e6. White pawn at b5, black pawn at d5, white queen at e5 and white knight at g5. Black knight at d4, white pawn at e4, black pawn at f4 and black pawn at g4. White pawn at a3 and white pawn at c3. White bishop at b2, white pawn at d2, white pawn at f2, white pawn at g2 and white rook at h2. White rook at a1, white knight at b1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 0. Full move number is 18. White to move.