rn1qkbrn/3p2pp/pp2pp2/2p2PP1/P1N5/1P1P3P/RBP1PK2/2Q2bNR w q - 2 16
FEN state: rn1qkbrn/3p2pp/pp2pp2/2p2PP1/P1N5/1P1P3P/RBP1PK2/2Q2bNR w q - 2 16 ; Best move: a4a5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at e8, black bishop at f8, black rook at g8 and black knight at h8. Black pawn at d7, black pawn at g7 and black pawn at h7. Black pawn at a6, black pawn at b6, black pawn at e6 and black pawn at f6. Black pawn at c5, white pawn at f5 and white pawn at g5. White pawn at a4 and white knight at c4. White pawn at b3, white pawn at d3 and white pawn at h3. White rook at a2, white bishop at b2, white pawn at c2, white pawn at e2 and white king at f2. White queen at c1, black bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 2. Full move number is 16. White to move.