3k2nr/1qpp1pp1/b1n4p/r3P3/Q1pBP2P/P2R3P/P3NP1R/4KBN1 w - - 4 18
FEN state: 3k2nr/1qpp1pp1/b1n4p/r3P3/Q1pBP2P/P2R3P/P3NP1R/4KBN1 w - - 4 18 ; Best move: a4a5
The current state of the chess board is: Black king at d8, black knight at g8 and black rook at h8. Black queen at b7, black pawn at c7, black pawn at d7, black pawn at f7 and black pawn at g7. Black bishop at a6, black knight at c6 and black pawn at h6. Black rook at a5 and white pawn at e5. White queen at a4, black pawn at c4, white bishop at d4, white pawn at e4 and white pawn at h4. White pawn at a3, white rook at d3 and white pawn at h3. White pawn at a2, white knight at e2, white pawn at f2 and white rook at h2. White king at e1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 18. White to move.