r3k1n1/p2pp2r/bp3p1b/1Qp3pp/2N2q2/P1PPB2P/1PK1PPP1/RN3B1R w q - 10 17
FEN state: r3k1n1/p2pp2r/bp3p1b/1Qp3pp/2N2q2/P1PPB2P/1PK1PPP1/RN3B1R w q - 10 17 ; Best move: b5a6
The current state of the chess board is: Black rook at a8, black king at e8 and black knight at g8. Black pawn at a7, black pawn at d7, black pawn at e7 and black rook at h7. Black bishop at a6, black pawn at b6, black pawn at f6 and black bishop at h6. White queen at b5, black pawn at c5, black pawn at g5 and black pawn at h5. White knight at c4 and black queen at f4. White pawn at a3, white pawn at c3, white pawn at d3, white bishop at e3 and white pawn at h3. White pawn at b2, white king at c2, white pawn at e2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 10. Full move number is 17. White to move.