tderz: I think is good (even better).
The normal White a threatens the same and also involves .
I wonder whether one could say that one is better than the other.
tderz: [1] ,
and
are miai - if
at
, then
.
White wins the semeai by 2 moves AND the ko at
x is still good aji for white (bad for black).
In the game Black got two moves in the upper left corner instead.
-
is a bad exchange - it loses one liberty.
tderz: White answers with to keep the nice ko aji in the corner. White wins by 2.