I'd agree that to be called International Chess, such a variant really should be already popular internationally. Yet, I would have it as 10x10 (like for its checkers namesake), so it couldn't be orthodox (8x8) chess.
Otherwise, like for International Checkers, I'd think that besides being 10x10 there should be no pieces added/dropped to the board once the game begins. So, perhaps the first such 10x10 variant that becomes popular enough internationally should grab the title by being re-named 'International Chess' (at least until it begins to have some sort of steep decline, like chess itself might one day).
At the moment the only contender for the moniker (10x10) 'International Chess' I'm aware of might be (10x10) Grand Chess, if only since it has been promoted a lot - but it is not yet near enough popular in most nations. Finally I'd note that I've seen somewhere on this CVP website (on a rules page for a 10x10 CV that uses rotating spearmen) the claim that 'many scholars' agree that if 8x8 chess is to be further developed, it will be by a 10x10 CV:
Interesting. The wiki on International Draughts mentions early on that it is synonymous with 'Polish Draughts' or 'International Checkers':
https://en.wikipedia.org/wiki/International_draughts
I'd agree that to be called International Chess, such a variant really should be already popular internationally. Yet, I would have it as 10x10 (like for its checkers namesake), so it couldn't be orthodox (8x8) chess.
Otherwise, like for International Checkers, I'd think that besides being 10x10 there should be no pieces added/dropped to the board once the game begins. So, perhaps the first such 10x10 variant that becomes popular enough internationally should grab the title by being re-named 'International Chess' (at least until it begins to have some sort of steep decline, like chess itself might one day).
At the moment the only contender for the moniker (10x10) 'International Chess' I'm aware of might be (10x10) Grand Chess, if only since it has been promoted a lot - but it is not yet near enough popular in most nations. Finally I'd note that I've seen somewhere on this CVP website (on a rules page for a 10x10 CV that uses rotating spearmen) the claim that 'many scholars' agree that if 8x8 chess is to be further developed, it will be by a 10x10 CV:
https://www.chessvariants.com/large.dir/contest/cenchess.html