I prefer these kinds of problems because even if you canāt read it out entirely, the first move is just so good for you that no matter what happens the end result is great.
Well you can agree that if white is dead already if surrounded, better not let him connect. Quite a big fish here. So checking P2 is a good idea but nothing happen there, just a distraction as black can give up T2, that will not help white to live if he gets surrounded
Now how you suggest to close the escape makes me think that this topic is very well fitted to you. Try a bit more reading as i am sure you can.
Ok you already have interesting ideas of possible moves. Now add a bit of checking mostly on liberties. Building a complete image with all the stones around where you played at step1 2 3ā¦ helps to check these libs.
These ānot so deep but still a bit trickyā problems should be like an invitation to sharp your teeth because, you guess, the reward is there and great.
More: the goal is to reach the state where you are convinced you have the solution. So you can check if another move is possible which is a good way to get convinced or to find a failure.
Problems are made in a way that there is only one starting answer.
Yes i forgot that branch. And i have difficulty to find any other move satisfying for white. I guess then white can at least enclose black if Itās in his interest (still costly, letting b live in big ) So as a variation of the problem, unlike the hane, the jump is relatively connected with the forcing move (still a cutting aji for an attack on the center stones later)
But maybe @le_4TC has something else in mind?
I didnāt consider that! I thought the wedge sequence from @Groin was cleanly working.
So the jump does not get easily cut, but the R6-S6-O7 sequence seems like a cleaner way to get out (and when black plays R6 immediately, it is a bit more sente than after the wedge, I think).
However, I tried to ask KataGo about it (setting up some arbitrary stones in empty corners) and as usual it seems like us poor humans have no idea what weāre talking aboutā¦
It doesnāt mind the immediate hane, because if white goes for the cutting sequence (which is kind of bad shape for white) there is aji with S4 that letās black live in the corner. And if R6-S6 is not strictly necessary, itās a sligthly bad exchange.
The tesuji for white to cut is still very useful to understand of course - sometimes it will be good in a real game, sometimes not.