Bill Spight wrote:White has made two one space extensions from secure territory in both the bottom left and top left corners, and answered a peep, besides. That's inefficient.
I guess those went in a different move order: Black played a shoulder hit, white pushed on the 3rd line, black jumps, white extended.
But yes, getting in a situation where black gets both of those in sente may have been dubious for white.
White has roughly 38 solid points, while black has 10 (I'm not counting the upper left as points yet). However, when it comes to potential, black has a much more favourable position.
White has the following problems:
1. The bottom left corner is completely enclosed
2. The bottom right group is not yet settled
3. Even though white is extremely thick in the upper right (to the point where I would call it overconcentrated), black's bottom right stone on the 2nd line prevents the right side from becoming truly big for white.
So black roughly needs to make about 30 points to win this game, which seems very doable considering the 2 unsettled white groups (upper left and bottom right).
I suspect the bottom left started out as a black enclosure from a 4-4 point, so white choosing to go into the corner seems to give black exactly what he wanted. The bottom right also feels too good for black, considering each side spent an equal amount of moves.
Your story is mostly what happened in the game, except that the bottom left was the result of an avalanche variation plus a bad tenuki in favor of the push up in the upper right, which was the worst play, I think. Also, your "congratulations" was spot on: too late did I realize capturing 3 stones was gluttonous.
If we allow thinking outside the box, and going back to the very first position:
1. On the "balance of mistakes" theory, Black has had two stones captured (= wasted) and on the right has been pushed down to the second line.
2. On the "equilibrium theory", White has more stones on the crucial large X diagonals - and perhaps more importantly seems well poised to control even more (and therefore will have the flexibility to control the game strategically).
On either theory White should be considered to have a significant advantage (in pro terms of being able to lead a favourable position to a favourable conclusion). Putting the two together makes it a slam dunk.
