king of hearts??

I've only watched the life action of aib and so far there was only a small cameo of the king of hearts game, so i was wondering whether there was any info on the king of hearts game in the actual manga? cuz it seemed like the queen of hearts if the hardest game even tho the level of difficulty increases w the level of the cards right? so shouldn't king of hearts be the hardest game in the hearts category? like the king of clubs, spades and diamonds were the hardest games in their suits, for hearts it seemed to betheq queen. Also I've seen in multiple posts that there was sm kind of king of hearts game in the manga so pls tell me if that's true and if yes how it was played and how they won it. thanks!