r1bnk1nr/p1pq1p2/3bp2p/R7/QP1P1p2/3P2P1/4PP1P/1N2KBNR w K - 0 18
FEN state: r1bnk1nr/p1pq1p2/3bp2p/R7/QP1P1p2/3P2P1/4PP1P/1N2KBNR w K - 0 18 ; Best move: f1g2
The current state of the chess board is: Black rook at a8, black bishop at c8, black knight at d8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black queen at d7 and black pawn at f7. Black bishop at d6, black pawn at e6 and black pawn at h6. White rook at a5. White queen at a4, white pawn at b4, white pawn at d4 and black pawn at f4. White pawn at d3 and white pawn at g3. White pawn at e2, white pawn at f2 and white pawn at h2. White knight at b1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 18. White to move.