4qbnr/1b1p1k2/rp5p/R1p1ppp1/1pP2P1N/1P1P2PP/3NP3/3QKBBR w K - 2 18
FEN state: 4qbnr/1b1p1k2/rp5p/R1p1ppp1/1pP2P1N/1P1P2PP/3NP3/3QKBBR w K - 2 18 ; Best move: a5a6
The current state of the chess board is: Black queen at e8, black bishop at f8, black knight at g8 and black rook at h8. Black bishop at b7, black pawn at d7 and black king at f7. Black rook at a6, black pawn at b6 and black pawn at h6. White rook at a5, black pawn at c5, black pawn at e5, black pawn at f5 and black pawn at g5. Black pawn at b4, white pawn at c4, white pawn at f4 and white knight at h4. White pawn at b3, white pawn at d3, white pawn at g3 and white pawn at h3. White knight at d2 and white pawn at e2. White queen at d1, white king at e1, white bishop at f1, white bishop at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 2. Full move number is 18. White to move.