[Rosalyn]

How'd you solve it (rule 16)?

I'm completely stuck on it... I've tried every single combination that came to mind :/

[Mogzol]

You can cheat by entering the board state into a site like https://nextchessmove.com/

[roboticmind]

The position seems to be randomized each time you play it, so their solution isn't going to be of much use for you

Also make sure to add the x for captures and the + for check and things like that

[iso1631]

I came up with "invalid notation" a bit, but on my first go I had something like "Bh5" and I needed "Bh5+"

If you put the opposing king in check you need to put the +

[riffraff]

try chessvision.ai, it allows you to scan the page and get the next best move.