DietersMistakesIn2022/solution23

Moves 190 to 190  

is a pretty simple defence. White can't because after there's nowhere to go. The cut at a needs 4 liberties to work and the aji in the centre is not strong enough to help. So must contend with instead, so can cover at . In the game I clumsily defended at b which gave White ample room to intrude or capture.

Failure to find a working sequence