4k1n1/rb1pppbr/P6p/2p1n3/Pp6/2PPP1PN/1Q3P1P/RNB1KB1R w Q - 1 17
FEN state: 4k1n1/rb1pppbr/P6p/2p1n3/Pp6/2PPP1PN/1Q3P1P/RNB1KB1R w Q - 1 17 ; Best move: a6b7
The current state of the chess board is: Black king at e8 and black knight at g8. Black rook at a7, black bishop at b7, black pawn at d7, black pawn at e7, black pawn at f7, black bishop at g7 and black rook at h7. White pawn at a6 and black pawn at h6. Black pawn at c5 and black knight at e5. White pawn at a4 and black pawn at b4. White pawn at c3, white pawn at d3, white pawn at e3, white pawn at g3 and white knight at h3. White queen at b2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at e1, white bishop at f1 and white rook at h1. White queenside is the only castle move available. Half move number is 1. Full move number is 17. White to move.