I've noticed that you can register boulders as on-sight and flash. When it comes to boulderproblems, think there should only be one or the other, since you often can walk around the boulder problem and feel every hold in the entire problem, and I would say that is pretty close to getting beta from a person who has actually done it/knows how to. So I think a boulder should be either a redpoint or a "first go" (call it flash or red-point, does not matter). Most boulderers I've met and talk too, will usually say that the flashed the problem I they did it first go with or without beta...
about chalk marks. that is very interestin thing to come up with. if you give a route a on sight try, i would say it is a on sight try, if there are chalk marks. but it is a big help.
I messed up some onsights, cos of chalk makrs on the wrong places. So no flash but still on-sight. but like the post before, it can be a help. for me bouldering 'on-sight' is a flash.
flash or redpoint?