rnbk2r1/Bpq1n1p1/p1pp3p/1P3p2/4p1P1/P2P4/2PNPP1P/RQN1KB1R w Q - 0 17
FEN state: rnbk2r1/Bpq1n1p1/p1pp3p/1P3p2/4p1P1/P2P4/2PNPP1P/RQN1KB1R w Q - 0 17 ; Best move: b5b6
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at d8 and black rook at g8. White bishop at a7, black pawn at b7, black queen at c7, black knight at e7 and black pawn at g7. Black pawn at a6, black pawn at c6, black pawn at d6 and black pawn at h6. White pawn at b5 and black pawn at f5. Black pawn at e4 and white pawn at g4. White pawn at a3 and white pawn at d3. White pawn at c2, white knight at d2, white pawn at e2, white pawn at f2 and white pawn at h2. White rook at a1, white queen at b1, white knight 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 0. Full move number is 17. White to move.