2kr1bnr/1ppb4/6p1/pq1ppp1p/PnP1P1PP/1P1P3R/5P2/RNB1KBNQ w Q - 0 16
FEN state: 2kr1bnr/1ppb4/6p1/pq1ppp1p/PnP1P1PP/1P1P3R/5P2/RNB1KBNQ w Q - 0 16 ; Best move: a4b5
The current state of the chess board is: Black king at c8, black rook at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at c7 and black bishop at d7. Black pawn at g6. Black pawn at a5, black queen at b5, black pawn at d5, black pawn at e5, black pawn at f5 and black pawn at h5. White pawn at a4, black knight at b4, white pawn at c4, white pawn at e4, white pawn at g4 and white pawn at h4. White pawn at b3, white pawn at d3 and white rook at h3. White pawn at f2. White rook at a1, white knight at b1, white bishop at c1, white king at e1, white bishop at f1, white knight at g1 and white queen at h1. White queenside is the only castle move available. Half move number is 0. Full move number is 16. White to move.