rnb1k3/3pppb1/p1p4r/qp1P2p1/PPP1Q2p/B5P1/R3PKBP/1N4NR w q - 0 17
FEN state: rnb1k3/3pppb1/p1p4r/qp1P2p1/PPP1Q2p/B5P1/R3PKBP/1N4NR w q - 0 17 ; Best move: b4a5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black king at e8. Black pawn at d7, black pawn at e7, black pawn at f7 and black bishop at g7. Black pawn at a6, black pawn at c6 and black rook at h6. Black queen at a5, black pawn at b5, white pawn at d5 and black pawn at g5. White pawn at a4, white pawn at b4, white pawn at c4, white queen at e4 and black pawn at h4. White bishop at a3 and white pawn at g3. White rook at a2, white pawn at e2, white king at f2, white bishop at g2 and white pawn at h2. White knight at b1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 17. White to move.