Endgame position and miai value analysis

[Knotwilg]

In the diagram undertitled WWBW, imo white 5 should be destroying the eye at a instead of blocking the side, which also protects the side at the same time, because of blacks damezumari. This is also the reason why imo black 4 should also be making the eye at a instead of a hane on the side)

Yes

$$W
$$ | O O O O O .
$$ | X X O X X X
$$ | . X X C . .
$$ | a 3 b X . .
$$ | S 1 X . . .
$$ | S O X , . .
$$ | S O X . . .

Click Here To Show Diagram Code

[go]$$W
$$ | O O O O O .
$$ | X X O X X X
$$ | . X X C . .
$$ | a 3 b X . .
$$ | S 1 X . . .
$$ | S O X , . .
$$ | S O X . . .[/go]

Here I'm giving both 1/2 a chance to play A, so for White to make 3 points instead of 2, and also 1/2 a chance to play B, so for Black to make 1 point instead of 0. On average, the count is -2

In similar positions b > a. It is easy to verify this by constructing https://senseis.xmp.net/?DifferenceGame
So black or white play b instead of a

Indeed. I have adapted it accordingly in the page.