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Introduction
On the 11th of November 2003 the Korean players Cho HunHyun and Lee ChangHo wrote a piece of Go history by creating a new opening pattern at as early as move 3. Up to that day the position after black 'A' in the diagram below had never been played before at professional level.
Cho HunHyun versus Lee ChangHo

The likely reason why 'A' in the diagram has never been played before is that occupying the upper-left corner makes more sense considering the high positions of black 1 and white 2 towards that corner while these stones have a low (uninteresting) position towards the lower-right corner. Lee ChangHo decided to play 'A' anyway and went on to win the game. This is a fine example of the freedom of choice Go players have in deciding their opening moves.

event black white km date place result #mn game
Myungin
Lee ChangHo
Cho HunHyun
6.5
2003-11-13
KR
blackR 161
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Corner and whole board developments

For corner developments (joseki) the past two months are being monitored. For whole board developments the past few weeks are being observed.

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