Arein, then Stockfish 8 is seeing something I am obviously overlooking. Even if you don't play Bxd4, I just don't see black has here better than Rb3 attacking the knight. As far as I can tell, white will win the isolated black pawn and be playing a pawn up in a rook ending. Can you give the line Stockfish 8 evaluated as black winning otherwise?

Sir,what do you evaluate the position as?

According to Stockfish 8, I was winning but just that single move.

Arein, well, there are "good" moves and there are moves that are better moves than you might make. In the position you gave, I would simply play 41. ...Rb3. I think white probably does best with 42.Rf6 Rc3 43.Rd6 and I think white is a pawn to the good in a rook ending. Is it decisive for white? Hard to say- there is an old chess joke that all rook and pawn endings are draws with best play, and it does sometimes seem that way over the board.

It's not a tactic but I would like to see the most accurate move available here.............most of the moves are losing

black to move

6k1/7p/3R1bp1/3p1p2/3P3P/2N2PK1/6P1/1r6 b - - 4 41

Position;

This occured in game of mine just a few days ago in a tournament in mumbai when I blundered 41. ... Bxd4 and lost after 10 moves.

I think it's 1.Qc6+ as after something like 1...Kd4 2.Qc4+ I believe that white is not far from delivering a checkmate.

When I first looked at this one, after the position that results after 1. Qc6+ Kd4, I thought it would be nice if the White knight weren't on the board, so that White could play the Qf3, threatening mate with the c3. Well send that horse to the meat-grinder..

1.Nf6+ exf6
2.Qc6+ Kd4
3.Qf3! Qh5+
4.Qxh5 Ke3
5.Qh4 Kd2
6.Qf2 Kd1
7.Qf3 Kd2
8.Qd3+ Ke1
9.f5 Kf2
10.Qd4+ Kf3
11.Qg1 Nd7
12.c4 Ne5
13.c5 Nd3
14.c6 e1=Q
15.Qxe1 Nxe1
16.c7 Nd3
17.c8=Q
It's a winning position for white.

You ought to be knighted for this one, Yancey.