2009년 9월 1일 화요일
PJ step 5. value 1 n one third (2) /baduk/
So, if there is not ending game bigger than this*, white must respond.
( *2 n one third I think. It's almost unusual anyway. )
Can black go other side?
If black goes other side, white will do ponuki and you ought to remember second dia - there is noting. But here, white do ponuki. - So, black can't go other side.
3 sequences ( W, X, Y ) make 2 crosses, so each 1 sequence makes two thirds.
Now, black 2 sequences ( X, Y ) make 1 and one third, but there are 2 crosses, so at first, there already exists two thirds black cross.
Got it? It may be difficult.
Conclusion 1 : Exist two thirds black cross in first dia.
Because W, X, Y are the same, and there is two thirds black cross, so Z is as well.
And, as you know, black and white has same right. ( so, two thirds multiple 2 )
Conclusion 2 : W, X, Y, Z has value of 1 n one third.
Not yet, to be continued.