3-4 point low approach one-space low pincer press
Typically, the press at is played when there are coordinating White stone(s) at the upper right corner.
Making use of the double atari weakness of the double hane, , and is the perfect chance to take some profit at the corner. Then ataris and extends. If , then White a, Black b, and White gains sente to attack the lone Black stone at the top, perhaps at c.
may begin a complicated fight. is a tit-for-tat move.
Charles There are some variations here in which White starts by pressing at a (and presses more than once). Then White fights at , or the square or circle points.
A simple outcome of this is for Black to sacrifice the two Black stones in the middle and settle for an exchange.
and is another way. Note that at is a mistake.
increases the number of liberties of the dead stones for more aji, and is vital to prevent Black from making a very comfortable atari there. is a tesuji that exploits the aji from to gain profit, and is also a tesuji that minimizes the loss in the corner.