Simple & easy. Just follow this:
1 - Every week, a new round of the event will be posted in the forum, just like the SOTW.
2 - The GM/Moderator who gets to organize this game will log into his/her account, go to any map and take a screenshot. Remember the coordinate and the map.
3 - Crop the screenie so that it won't be too large. Drop it on the forum.
4 - To win, it takes the first person to do BOTH of these:
i) reply with a screenshot of his/her in-game character sitting/standing at the same location (map) about the same coordinate (doesnt have to be exactly the same coordinate, though).
ii) state the coordinate of where his/her is at.
Example;
A GM posted this screenie;
and this is one example of a winning-screenie;
The trick lies at the viewing angle that the GM chooses. Players might be at the same coordinate but they might not think that they are on the right place when the viewing angle differs completely that it might affect their perception. Look at the winning screenie, for example. It has a different viewing angle than the GMs, but the coordinate is near. The first screenie (assuming it as the GM's) is at pay_fild04 301 103. And the winning screenie is at pay_fild04 303 103.
Once posted, the contestants cannot edit their post.