rq4nr/1bppb1kp/2n2pp1/pp3P2/P1P3PP/2NPp2R/RP2P1B1/2BQ1KN1 w - - 4 17
FEN state: rq4nr/1bppb1kp/2n2pp1/pp3P2/P1P3PP/2NPp2R/RP2P1B1/2BQ1KN1 w - - 4 17 ; Best move: a4b5
The current state of the chess board is: Black rook at a8, black queen at b8, black knight at g8 and black rook at h8. Black bishop at b7, black pawn at c7, black pawn at d7, black bishop at e7, black king at g7 and black pawn at h7. Black knight at c6, black pawn at f6 and black pawn at g6. Black pawn at a5, black pawn at b5 and white pawn at f5. White pawn at a4, white pawn at c4, white pawn at g4 and white pawn at h4. White knight at c3, white pawn at d3, black pawn at e3 and white rook at h3. White rook at a2, white pawn at b2, white pawn at e2 and white bishop at g2. White bishop at c1, white queen at d1, white king at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 17. White to move.