r1b1qb1r/2Pk1p2/ppnppnpp/Q4P2/1BP4P/P3R1P1/3PP3/RN2K1N1 b Q - 0 20
FEN state: r1b1qb1r/2Pk1p2/ppnppnpp/Q4P2/1BP4P/P3R1P1/3PP3/RN2K1N1 b Q - 0 20 ; Best move: b6a5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at e8, black bishop at f8 and black rook at h8. White pawn at c7, black king at d7 and black pawn at f7. Black pawn at a6, black pawn at b6, black knight at c6, black pawn at d6, black pawn at e6, black knight at f6, black pawn at g6 and black pawn at h6. White queen at a5 and white pawn at f5. White bishop at b4, white pawn at c4 and white pawn at h4. White pawn at a3, white rook at e3 and white pawn at g3. White pawn at d2 and white pawn at e2. White rook at a1, white knight at b1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.