Jaroswald: Its just confusing that on some problems there is "(seki)" note and on others there is not. Few problems before (problem with seki without seki notation) there was even some arguing from admins, that seki is live so there is no need for notation. I completely agree with that, but stick with it everywhere. This is just confusing.
d4rkm4tter: This website is created by different people and a hint is optional. Just like on all other websites.
paisley: I wish these problems wouldn't say "seki." A life-and-death tsumego should be "live/kill in the best way possible," just like in a real game. I saw the seki immediately, but, imho, part of solving a seki problem correctly is seeing that unconditional life is impossible, which is harder. I can avoid the mistake of clicking before fully reading a problem on other problems just through discipline, but the spoiler on these really prevents reading it out properly. Unfortunate.
caranthir: Hints like that are not so much present in harder collections. In any case, even if it says "seki", you should read enough to convince yourself that it's really the best that can be done.
Its just confusing that on some problems there is "(seki)" note and on others there is not. Few problems before (problem with seki without seki notation) there was even some arguing from admins, that seki is live so there is no need for notation. I completely agree with that, but stick with it everywhere. This is just confusing.