rn2kr2/pb1p1p2/3Qp1pp/1pp4n/1BPP3q/b1K1P3/1P3P2/R1N2BNR b - - 3 21
FEN state: rn2kr2/pb1p1p2/3Qp1pp/1pp4n/1BPP3q/b1K1P3/1P3P2/R1N2BNR b - - 3 21 ; Best move: a3b4
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black rook at f8. Black pawn at a7, black bishop at b7, black pawn at d7 and black pawn at f7. White queen at d6, black pawn at e6, black pawn at g6 and black pawn at h6. Black pawn at b5, black pawn at c5 and black knight at h5. White bishop at b4, white pawn at c4, white pawn at d4 and black queen at h4. Black bishop at a3, white king at c3 and white pawn at e3. White pawn at b2 and white pawn at f2. White rook at a1, white knight at c1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 3. Full move number is 21. Black to move.