kovarex:
I added refutation to the T18

Lyde:
(Top left) Why is A18 not working? Also, surprisingly, even though I lost a heart for A18, it still marked the problem as "solved" when I also put D19 and B19 as follow-ups (possibly because that ending situation is present in the variation tree?) I guess that's not supposed to happen... Also, when I put a "correct variation" until the end while in review mode, and then click on the board or the variation tree, it immediately takes me to the next problem. Also, one of the variations has "incorrect" moves after a correct, finished solution marked with a plus and an incorrect variation is marked with a plus? What is happening :D