rn4nr/p5bp/Q1kp1pp1/1p4P1/3p4/P2bPP1P/RR2N3/2BK2N1 b - - 0 21
FEN state: rn4nr/p5bp/Q1kp1pp1/1p4P1/3p4/P2bPP1P/RR2N3/2BK2N1 b - - 0 21 ; Best move: b8a6
The current state of the chess board is: Black rook at a8, black knight at b8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at g7 and black pawn at h7. White queen at a6, black king at c6, black pawn at d6, black pawn at f6 and black pawn at g6. Black pawn at b5 and white pawn at g5. Black pawn at d4. White pawn at a3, black bishop at d3, white pawn at e3, white pawn at f3 and white pawn at h3. White rook at a2, white rook at b2 and white knight at e2. White bishop at c1, white king at d1 and white knight at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. Black to move.