HolIgor Explores Yose Problem 3

This position in quite typical. The problem is not only to find the value of the move but to find the best moves. This makes the calculations more difficult.

reduces the position to the usual one point yose of the type 7+|1><0| + |0><1|.

White 1 make the situation quite complicated because black's connection makes white play sente. So, the problem is reduced to the next subproblem.

Black first. Connection produces the score of <3|2> .

If White plays first and white is a ko monster then the position reduces eventually to

The score is <0|5>

The record of the yose game is

B(7,1)( |1><0| + |0><1|) + W(0,0)(B(3,2) + W*(0,5))

The averaging should start from the deepest.

B(7,1)( ( |1><0| + |0><1| ) + W(0,3)(|2><0| + |0>?<4|) =

1.5 + |4.5><0| ( |1><0| + |0><1| ) + |0><4.5| (|2><0| + |0>?<4|)

Thus, the value of the move in this position is 4.5 .