4kb1r/1r3pp1/p2p1n1p/Q1P5/P1p1pP2/4P3/1PNB1K1P/1R1b1BNR w k - 1 23
FEN state: 4kb1r/1r3pp1/p2p1n1p/Q1P5/P1p1pP2/4P3/1PNB1K1P/1R1b1BNR w k - 1 23 ; Best move: a5a6
The current state of the chess board is: Black king at e8, black bishop at f8 and black rook at h8. Black rook at b7, black pawn at f7 and black pawn at g7. Black pawn at a6, black pawn at d6, black knight at f6 and black pawn at h6. White queen at a5 and white pawn at c5. White pawn at a4, black pawn at c4, black pawn at e4 and white pawn at f4. White pawn at e3. White pawn at b2, white knight at c2, white bishop at d2, white king at f2 and white pawn at h2. White rook at b1, black bishop at d1, white bishop at f1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 1. Full move number is 23. White to move.