[madez]

> Copy paste is disabled remember...

s/The user just copy and pastes it into the game./The user emulates his keyboard typing that string.

I don't see the point in this. It's just adding noise instead of talking about the real problem.

> As for the rest, that is up to the developer with more resources than his opponents.

If it were like that, I'd be happy. Right now it's trivial to completely solve the game.

Even though the game is not suited for competitive gaming it is great to teach some math.

[readerrrr]

Just impose rules that are trivial for humans to solve reliably and not for computers.

[madez]

Can you give an example for such a rule?