Side pattern - Rin Kaiho's Onadare and 4-4 high approach

The side pattern  

With the Large Avalanche - Turn Outward variation in place in the upper left, is part of a special plan. - is a standard joseki after the high approach to the 4-4 stone in the corner and up to , white creates an impressive moyo along the top. In some cases white skips the exchange of -. If black extends to a after , white can expand the moyo along the top with a move at b.

As is the last move of this variation of the avalanche joseki in the upper left, black will quite often choose to play a low extension from his stone in the upper right in order to neutralize some of the influence built up in the upper left. Playing this pattern therefore depends on black allowing it.

First use in a game

Rin Kaiho (W) vs. Cho Chikun (B) - 4th Meijin League (1979)  

After White finished the joseki in the upper left with , black took the last open corner left with . White now plays the unusual approach in the upper right. With the moves -, white first establishes a position on the right side.

 

After stabilizing his stones on the right, Rin continues the joseki in the upper right with . After , he has finished the pattern and built a large moyo along the top. In this game, Cho immediately invaded at a, and heavy fighting broke out. The black invasion dies on a large scale in exchange for a ponnuki in the center. When that fails to pay off, black resigns after move 150.