Promoting to a bishop?

We have all seen positions where promoting to a Knight is the right move, to fork some pieces.
lichess.org/analysis/8/3q1P1k/8/8/8/P7/K7/8_w_-_-_0_1?color=white
Even to a rook to avoid stalemate, but I have never seen a position where promoting to a bishop is the correct move.

What do you folks think?

Oh that's so amazing, thanks for sharing!

@KenulL_76 - that ́s brilliant; literally the only move which doesn ́t allow Black to force a draw!

Here's a nice collection of genuine underpromotions to bishop or rook compiled by Tim Krabbé:

timkr.home.xs4all.nl/chess2/minor.htm

Here's a Lichess version of the last example in Krabbe's collection, which he called the most interesting one. Promoting to a queen or rook ends in a draw (perpetual check or stalemate), promoting to a bishop appears to be winning.

(Sokolsky - Ravinsky, USSR 1938)

There's an interesting study by Joitsa 1955 where bishop is the only choice:



This study has three underpromotions and a bishop is one of them:



This doesn't really count because it wasn't necessary, but Fabi underpromoted to a bishop a few years ago in the US championship, and it's interesting to hear him talk about it:

youtu.be/Bz-V5wms0pk?si=2y9VdDEeoqUe1Uyo

What about this study?

Lichess.org/editor/8/7p/4rP1R/6kp/8/5K2/7P/8 w - -

@Sarg0n - Are you sure that ́s the right study? Stockfish gives this, no bishop in sight:

1.f7 Rxh6 2.h4+ Kxh4 3.f8=Q

If black plays 2... Kg6 instead, 3. f8Q would be a stalemate if I didn't miss anything. 3. f8B would force Kf7, Kf6 or Kf5 with 4. Bxh6. The resulting position still needs a lot of work but it should be winning for white.

Edit: and Stockfish does see it that way too, you just have to leave it running at least to depth 40 or so.