I recently played a 3k on OGS and benefitted greatly from the commentary of a 5-dan. Normally I just use the AI, but the human touch in this case was super valuable. So let’s hit the high points of his review.
White makes an overplay
Here White has just played at O14 but …
I get the idea of this, but given the vast space in between white’s positions, and the fact that the white wall at d15 isn’t all that strong, it makes way more sense to do a standard extension along the top, which will then coordinate with the wall as well. Something like A or one of the X points. This leaves open such a big space that splitting it with an invasion should be easy and valuable, since white has expended an extra stone here building outward. I black invades the top and makes a stable group there easily, how valuable will o14 end up being?
Part of the problem is that the marked white stones don’t have a base. So now white has two formations which hsve influence but not a stable base or thickness. If one or the other was truly thick, it would be much more dangerous for black to invade the top, and the expansion might be a good strategy.mi3chaels
There are no weaknesses but I do not choose the biggest move
Since I use the Clossi approach to select a move, I chose a big move because I did not see any weaknesses, however
Invading around A is significantly bigger than other large points because of white’s overplay at o14.mi3chaels
I’m afraid of the suggested move by Mister 5 Dan because my 2-space extension can be attacked
If I do what the 5-dan suggests, then this position is very likely:
Opponent surrounds before preventing base formation
In the Clossi approach, you remove base before surrounding.
removing one side or the other seems a better strategy. This move is designed to create white influence and thickness toward the center. Where does white intend to use that thickness to profit?mi3chaels
I make a 2nd 2-space extension from a single stone … shame, shame, shame
As you can see, making a single 2-space extension on the 3rd line is a good idea. The second extension is better as 1-space.
White starts a fight that is out-of-theme with his outside moyo building
the two-space extension has other ways to be weakened. this strong fighting move breaks with the general theme of White’s game:
this seems like an odd move. It’s not crazy, because of the white capping stone above, but it doesn’t really work better than other options here.
White has so far committed two stones to a “seal in and make thickness outside” plan. Why not continue with something like a or B. At least that has the virtue of assuring white’s strength and connection, even if it gives black more than they were probably entitled to here.mi3chaels
I miss a crucial hane
Looking back at this position, I dont know why I didn’t play the best move (I’ll let you find it).
DONT PUSH UNLESS YOU INTEND TO CUT
I learned this in my Bruce Wilcox days… of course the main thing is to survive, but there are better options for me here.
It’s rarely a good idea to push into a knight’s move if you cannot, or do not intend to cut after. Bad shape, and it just strengthens the opponent, and may remove the ability to cut later.mi3chaels
How do I remind myself to look at ALL group and not panic when I fear death for one of my groups?
The best move in this situation involved looking at the one stone at G17 and coordinating an attack against the J17 group. But I was so nervous I never even looked at the possibility!!!
Cough, cough: DONT PUSH UNLESS YOU INTEND TO CUT!!!
As if one failure in the same game was not enough:
this move wastes the aji of the marked stone. It pushes white into connecting up. Also pushing into the knight’s move where you aren’t about to cut, always a suspect plan. The reason the AI keeps wanting you to play j16 is because of the h17 cut. Note, the cut doesn’t have to work in the sense of capturing or connecting back to be worth it.mi3chaels
I never know how to choose a cutting direction!!!
Apparently I made another mistake in deciding on which side to cut. Regretfully, I did not get any specific reason why my cutting choice bad.
White tries to remove eyes?
I’m not sure who truly had the advantage in this local battle to the death… I say local because even if White lost this local battle, he should’ve been able to win the war being 3 stones stronger.
I gained so much from this commentary that I streamed it live on Twitch.