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B Q M 20
Hello. I recently played this game as white. The situation in the upper right resulted from my opponent making a 3-3 approach to my mokuhazushi stone. The invasion with the marked stone seems like an unreasonable overplay. Is it? And should I try to kill it? It seems like any group living in this area is completely erasing any influence I might have built up. --BlueWyvern
HolIgor: This kind of invasion seems to be premature, but it is not easy to kill the marked stone. However white can get good results attacking the black stone. Don't worry about the influence of the wall. Right now the wall makes it job perfectly. It helps you in the fight. I might sound as a paradox but using walls for encircling territory is not a good strategy. The territory turns out not that big. The influence should be used for a fight and in this positioon it is actively fighting. Since you have a nice wall the attack should be directed from the other side. You will reinforce your two stones that are currently cut off. If black tries to pull out this stone then several next moves he won't be building territory while you can make territorial gains with each move. However small they will sum up.
One of the plans of attack can start with taking a possible base of the opponent playing at 'a' for example. Capping the opponent at 'b' is another great possibility, but in that case you leae more room for him to survive.
BillSpight: White should drive Black towards the wall. W 1 is perhaps the strongest attack.
Black plays 4 as a sacrifice to get some aji for running.
Black uses a threat to cut off White's wall to make his exit, but White "crawls" on the 5th line.
White keeps up the pressure, building both thickness and territory.
This is one variation, no guarantee of correct play. ;-) It is also possible to sacrifice White's original wall for a huge wrap-around wall.
Due to the marked stone, can B play 1 here? W can not cut through the gap at 'a'. If something like the diagram follows, the W upper left is still open and the B cut at 'b' remains.
Bill:
B 1 - 5 does look better. :-) But W 6 in this diagram is honte.
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