r1bq2nr/p1pkp3/np1p3p/5p2/1PP1BQ1p/P3b1P1/N3PP2/R1B1K1NR w KQ - 0 17
FEN state: r1bq2nr/p1pkp3/np1p3p/5p2/1PP1BQ1p/P3b1P1/N3PP2/R1B1K1NR w KQ - 0 17 ; Best move: f4f5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black king at d7 and black pawn at e7. Black knight at a6, black pawn at b6, black pawn at d6 and black pawn at h6. Black pawn at f5. White pawn at b4, white pawn at c4, white bishop at e4, white queen at f4 and black pawn at h4. White pawn at a3, black bishop at e3 and white pawn at g3. White knight at a2, white pawn at e2 and white pawn at f2. White rook at a1, white bishop at c1, white king at e1, white knight at g1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 0. Full move number is 17. White to move.