XGID=---b-CE-C--Bba--abacc---AA:0:0:1:21:0:0:3:0:10
Money play. How should Red play 21?
Taking an anchor on either the 24-pt or the 23-pt doesn’t exert enough pressure on White’s position.
Bar/23, 6/5 is a reasonable try which exerts pressure without being too risky (Note that bar/23, 5/4 is the wrong idea because it fights a war on two fronts). However, Red needs to put as much pressure as he can on White’s blots before White’s position improves. The correct play is the seemingly bold bar/22. If that blot is pointed on Red may well have a lot of return shots against White’s blots on the 9-pt or bar-pt. Red is not favourite here (he wins about 35% of the time) so he should take action now to try to improve his position.
Anything other than bar/22 is a blunder.