Will Bosi is a strong boulderer from Scotland. 9A/V17 is the hardest boulder grade so far. At present there are 5 boulders graded 9A:
Burden of Dreams
Return of the Sleepwalker
Alphane
Megatron
L'Ombre du Voyageur
Will Bosi has climbed 3 of these, most recently Return of the Sleepwalker.
The gist of this question is whether Bosi will "complete" the set of 9As in the world before people add more to the list. You can think of it as trying to distinguish between a couple of possible worlds:
Strong Bosi world: Bosi is able to complete the hardest climbs faster than other climbers can find them
Many strong climbers world: The number of boulderers strong enough to climb 9A only keeps increasing, and they put up boulders faster and faster, and Bosi is just one of many and has no hope of keeping up.
If at any time there are eight 9A boulders that Bosi has not done, this market resolves NO. (We use this as a proxy for "number of boulders is growing faster than he can keep up.) If at any time he has climbed all the 9A boulders in the world, market resolves YES. Otherwise, market remains open and close date will be extended as necessary.
A boulder "proposed" 9A (i.e. only one climber has climbed it) counts, as long as the general consensus is that it was a serious grading by a strong climber. If there is significant controversy I will do my best to defer to expert opinion in a fair way. Because there's this element of subjectivity, I won't bet.
1,000Hmm, closed the market because I thought it was ready to resolve, but it seems my sources might not be fully up to date. This one: https://climbing-history.org/list/26/the-hardest-boulder-problems-in-the-world
makes it look like the market should resolve NO: there are 12 9As, of which Bosi has climbed 4, leaving 8 that he hasn't (criteria for resolution).
But then I looked at the other source I used before: https://hardclimbs.info/hardest-boulders-in-the-world/
and it shows just 10 9A boulders (classifying two as 8C+/9A). It also says Bosi has climbed only 4 boulders, but each source has a different 4, making a total of 5. (I assume it's more likely that somebody has missed one than that somebody has accidentally said he's climbed something that he hasn't.)
So it looks like the market remains open, but I'm not sure I fancy Bosi's chances!
@KongoLandwalker it comes up in a few places if you Google it. For example here if you scroll down a bit. I'm afraid I don't know the best place for being kept up to date. https://hardclimbs.info/hardest-boulders-in-the-world/
@Fion don't "EpicTV climbing daily" channel on youtube track hardest climbs? I do not watch the show anymore, but some time ago they had a regular rubric. I don't remember whether it was bouldering or lead rubric