heron:
Yea, the sequence I said below seems like it should end a move earlier? Because when the refutation plays E17 it should instead play a ko threat, or else they die.

heron:
Something seems wrong with this one to me: I played G19 F19 E19 H19 H18 F19 C19 G19 A14 A17 A16 E17 A15 and it says "incorrect", but defender looks totally dead, not even ko. I'm not sure my sequence is very good but there must be some error in the solution.

YuriyStepanovich:
Bg1-Wf1-Bd1-Wh1-Ba6-Wa3-Ba4-We3-Ba5 kills the White, but message is "Incorrect". Why?

YuriyStepanovich:
After Wg1-Bf1-Wd1-Wa6-Ba3-Wa4-Be3 Wa5-Bany-Wc1 White kills Black, but Wa5 marked "Incorrect", why?

kovarex:
This problem is now the prototype as a status-based problem. This means, that the branches are not marked as correct or incorrect by + comments, but instead, there is specification of the status, and the applet automaticallly assigns the correct branch based on the best possible status. This is to show that the correct variation is A+3KO (3 approach move ko), while some other, similar variations are not good enough, as they might be only A+2KO (2 approach move ko) There are still tweaks to be done (mainly to show the full-text status explanation in the review mode), but it seems to work nicely as a prototype.

posetcay:
Also added a stone outside to remove N1-M1-O1-Q1 possibility.

posetcay:
The solution is correct, but opponent's refutations were wrong in many places. For example, R1-Q1-N1 should be answered by M1 and R1-Q1-T2 should be answered by P3 etc. Made the necessary corrections.