Did Leela Zero miss a win in this position? Did Leela Zero miss a win in this position from game 106 of the Computer Chess Championship, on move 83 with White to move?
[FEN &quot;8/2p1r3/2P4k/1P1pB2p/K2NbP1R/P5r1/8/8 w - - 0 1&quot;]

Here, Leela Zero played Bxc7? for their 83rd move. I went deep to analyze the position at 34/91 with Houdini 6.02 for one hour, and the game reached a position with White having a rook, bishop, knight and pawn against Black's two rooks. I analyzed it again starting from there, and either White will increase his positional advantage or Black will be forced into simplifying into a tablebase win for White. Is all this true? Rh2 was the winning move according to Houdini 6.02.
For what that's worth, Stockfish 11 gives

Rh2 as +2.6
Kb4 as +2.2
Bxc7 as +0.6
other moves as 0.0

on my machine at depth 45 (will be updating this answer while it digs deeper). Rh2 and Kb4 occasionally switch positions as #1 and #2, so it's still unclear which one of these is truly best. Bxc7 surely isn't, however, at least if you believe Stockfish.
One important note: The top evaluation score has hovered between +2.0 and +2.6 since depth 15. Apparently, Stockfish has not found a way to substantially improve White's position (let alone win) in the last 30 plies. It's still possible that the game will end in a fortress situation with perfect play, and then Leela would in fact not have missed a win (despite having played a suboptimal move).

Edit:
At depth 54, it's

Rh2 as +3.9
Kb4 as +2.2
Bxc7 as +0.1
other moves as 0.0

Still not fully conclusive, but we're starting to get somewhere.
In any case, Bxc7 was certainly not the most optimal move that Leela could have played.