Conclusion:
Spoiler masking is working.
Formattig needs a pair of tags.
BTW, what about nesting?
>Quoting can be done.
>>1560 "On board"-linking is possible.
>>>Cross-linking probably not.
Links are created with just plain URLs.

Can the detour via "jump.kolyma.org" be avoided for links inside gurochan?
And can an already on the board existing image be adressed in a way that it is shown itself instead of the link?
Help would greatly appreciated.