Yoonyoung Kim 4p made a video review of this game, linked below. Also, the broad strategic thing which struck me the most (apart from all the ko trades) was how Ke Jie managed to make himself a nice chunky centre territory with a smattering of weak stones. Yes, he spent a few gotes to do so which enabled black to win the lower left ko, but I wonder if black missed a chance to harass white a bit an stop him from so efficiently turning a liability into an asset. A few ideas for investigation with LZ later:
- move 65 or 71 cap at m11,
- instead of e13 can black get d13 c13 d12 c12 e11 in sente with w answer d10 and then k11 or would white tenuki not d10
- 107 necessary? Can black do something in the centre first like m12? m12 n10 k11 looks pretty nice to make a black instead of white centre, how does it compare to sacrificing m7?
- 143 conceded ko, could black do some middle things first, maybe there's a way to probe on n13 stone: later during ko it's light, but now when white is still dreaming of attacking black q14 he might want to save it.
- white j15 and k17 very cool and flexible
- once the lower left ko became direct centre threats wouldn't be big enough
- painful that black had to live with r15 and couldn't o16, that looks like a long life and death problem so did Kim reckon he would die, or thought he could win this way?
- q1 too late to do middle things I suppose, but still seemed odd place to spend a gote, was it to avoid white's 1st line sente endgame?
https://www.youtube.com/watch?v=4XvnRDvyKZo
229 should have been at B11. This apparently flipped the result to W+0.5.
