Problem 1 This is the early middle game between a 6D and 5D. Your task here is to show each side’s Sector Lines as the players would visualize them.
Click Here To Go To Problem 1 Solution
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Problem 1 This is the early middle game between a 6D and 5D. Your task here is to show each side’s Sector Lines as the players would visualize them. Click Here To Go To Problem 1 Solution |
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Problem 2 Where are the operative Sector Lines here? And how significant are they? Problem 3 It was actually Black’s turn to play here, so what’s his best move? And (equally important) why? If it was White’s turn to play instead, where would be his best move, and why? Click Here To Go To Problem 2 Solution Click Here To Go To Problem 3 Solution |
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Problem 4 In this position: 1. Show any Sector Lines that are operative. 2. Answer the following questions: A. How solid/secure do you assess those Sector Lines to be? B. Based on that assessment, should Black think invasion? Or reduction? Click Here To Go To Problem 4 Solution |
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Problem 5 This position arose in a game between two 5D players. What’s Black’s key play here, and why? If it’s White’s turn instead, what would be his best move? Click Here To Go To Problem 5 Solution |
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Problem 6 When B1 was played in this game between a 6D and 5D, the marked 4 Whites are within Black Sector Lines and almost trapped. At the same time, the two Blacks are themselves still within a White Sector Line, so that these competing Sector Lines technically cancel each other! But the two Blacks have the outside while the four Whites are almost enclosed! So it’s clear that if these White stones don’t escape immediately they will die, because there’s insufficient room on the edge for them to form two eyes. So the key questions are: Can they escape? And if so, how? Click Here To Go To Problem 6 Solution |
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Problem 7This position that arose in a game between a 5D and a 4D. White has constructed a vast (but still incomplete) lower center moyo which Black would much like to reduce. At the same time, Black’s own upper side position is also becoming impressive, so in playing to reduce White’s moyo Black must be careful that White’s counter play doesn’t inflict even worse damage on his own position - and that’s quite likely to be the outcome if he plunges in too deeply! So the move Black seeks is one that looks carefully in both directions, and the best answer is quite readily suggested by the Sector Line concept! Can you find it? Click Here To Go To Problem 7 Solution |