r2k2n1/p1p1br2/n5p1/2qp1pPp/PPP5/3QP3/4PPR1/R1B1KbN1 b Q - 1 23
FEN state: r2k2n1/p1p1br2/n5p1/2qp1pPp/PPP5/3QP3/4PPR1/R1B1KbN1 b Q - 1 23 ; Best move: a6b4
The current state of the chess board is: Black rook at a8, black king at d8 and black knight at g8. Black pawn at a7, black pawn at c7, black bishop at e7 and black rook at f7. Black knight at a6 and black pawn at g6. Black queen at c5, black pawn at d5, black pawn at f5, white pawn at g5 and black pawn at h5. White pawn at a4, white pawn at b4 and white pawn at c4. White queen at d3 and white pawn at e3. White pawn at e2, white pawn at f2 and white rook at g2. White rook at a1, white bishop at c1, white king at e1, black bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 23. Black to move.