Re: from chobo to gosu
Posted: Thu Nov 03, 2016 4:43 pm
As skydyr pointed out (and you learned in the game), you can't treat the N6 cut as if it were a ladder. However, if White plays 7, you can catch it in a net. After 10 below White cannot escape. Play around with this position until you are sure you understand it. Note that the dead White stones have considerable aji. You cannot resist either the cut at 'a' nor the push at 'b'. Indeed you probably have to give up the stones on the right side if White keeps pushing after 'b'. Note also that if White had used 7 to play atari at 'c', Black would have had to let the stones escape due to the aji on the side.
So is 2 above the right way to answer 1? No it is not. You could do much better. You should notice that the lower right White stones are not alive. Your goal is not to catch the N6 stones but rather the lower right group. Start from the other side with 2 below. If White pulls out the N6 stone almost any play on the right protects everything and ensures that the lower right stones are captured (playing at 3 is the most conservative). If White plays 3, trying to use the aji of 1 in order to live, it looks like Black can keep everything with 6 and so on. Note that if you play 2 at 3 immediately to keep the right safe, White can capture two stones with 'a'. This is not terrible compared to your gain on the right. However, you have time to protect with 2 if you understand conditions on the right.