Systematic Joseki 4-4 3-6 3-5
Difficulty: Introductory Keywords: Joseki
Summary - Mistake - Hoshi Low approach Kosumi-Tsuke
is a mistake like this and is only played when there's already a black stone at a (See 4-4 Tn 4-10 3-6 3-5). Because this way White gets a perfect extension (2+1 from the wall) but the Black corner still has aji!