4k2r/1b1pbpp1/r3pnPp/Qppn4/4P2P/P1P1R3/NP1P1P1q/R1B1KBN1 w Q - 1 18
FEN state: 4k2r/1b1pbpp1/r3pnPp/Qppn4/4P2P/P1P1R3/NP1P1P1q/R1B1KBN1 w Q - 1 18 ; Best move: a5b5
The current state of the chess board is: Black king at e8 and black rook at h8. Black bishop at b7, black pawn at d7, black bishop at e7, black pawn at f7 and black pawn at g7. Black rook at a6, black pawn at e6, black knight at f6, white pawn at g6 and black pawn at h6. White queen at a5, black pawn at b5, black pawn at c5 and black knight at d5. White pawn at e4 and white pawn at h4. White pawn at a3, white pawn at c3 and white rook at e3. White knight at a2, white pawn at b2, white pawn at d2, white pawn at f2 and black queen at h2. White rook at a1, white bishop at c1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 18. White to move.