r2qkbr1/1b5p/ppp2p1n/3pp3/3P1P2/NPPnPQPp/P2BK3/3R1BNR w q - 6 18
FEN state: r2qkbr1/1b5p/ppp2p1n/3pp3/3P1P2/NPPnPQPp/P2BK3/3R1BNR w q - 6 18 ; Best move: f3h5
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at g8. Black bishop at b7 and black pawn at h7. Black pawn at a6, black pawn at b6, black pawn at c6, black pawn at f6 and black knight at h6. Black pawn at d5 and black pawn at e5. White pawn at d4 and white pawn at f4. White knight at a3, white pawn at b3, white pawn at c3, black knight at d3, white pawn at e3, white queen at f3, white pawn at g3 and black pawn at h3. White pawn at a2, white bishop at d2 and white king at e2. White rook at d1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 6. Full move number is 18. White to move.