Impossible to get 3 stars for problem 9 of castling in /learn

[anakojm]

Exact URL of where the bug happened

https://lichess.org/learn#/14/9

Steps to reproduce the bug

try to solve the puzzle (ex: 1. f3 2. NxC3 3. Ne2 4. Nf4 5. O-O-O).

What did you expect to happen?

get 3 stars as 5 moves is the fastest way to castle queenside (very much probably i’m not certain)

What happened instead?

got 2 stars out of 3

Operating system

Artix Linux

Browser and version (or alternate access method)

Librewolf 122.0-1

Additional information

In this commit the board is updated from a position where one can indeed castle in 4 moves (1. Na3 2. Nxc2 3. e3 4. O-O-O) to one where it is not possible, without changing the minimum required moves: 3925931
i can make the PR to change it to 5 if you want

[pbennyjoseph]

I don't think this is a bug. There is a solution with 4 moves Nxc3, Ne2, f4 and O-O-O.

[anakojm]

Oh yes thanks. Sorry for the trouble.