rnb1k1nr/ppp2pbp/6p1/P7/1R3p1P/2PP4/1P2PBP1/1N1QKB1R w K - 0 17
FEN state: rnb1k1nr/ppp2pbp/6p1/P7/1R3p1P/2PP4/1P2PBP1/1N1QKB1R w K - 0 17 ; Best move: b4f4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at f7, black bishop at g7 and black pawn at h7. Black pawn at g6. White pawn at a5. White rook at b4, black pawn at f4 and white pawn at h4. White pawn at c3 and white pawn at d3. White pawn at b2, white pawn at e2, white bishop at f2 and white pawn at g2. White knight at b1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 17. White to move.