Life In 19x19

I got a different solution to Problem 4 in Chapter 9 of Davies' "Life or Death" and I'm curious if my solution is wrong or less optimal in some way or just a different solution.

The problem is:

Click Here To Show Diagram Code

[go]$$Bc Black to make a Ko
$$ | . . . . .
$$ | . X X . .
$$ | O O X . .
$$ | . . O X .
$$ | . . O X .
$$ | . . O X .
$$ | . O X X .
$$ | . . . . .
$$ +-----------[/go]

My solution is:
Davies lists the solution as:
Is it just that Davies solution closes off the outside in sente? So that even if Black loses the ko, White doesn't get any endgame pushes?

Yes. Both solutions lead to ko with White taking first. In the standard solution the ko is less favorable for White.

And what about this for white, is it better for her ?

Oops! This is better. In fact, in a real game it would probably be the main line.

Edit: Forget what i wrote - i was wrong. (Doing tsumego before coffee is not a good idea)

MagicMagor wrote:Edit: Forget what i wrote - i was wrong. (Doing tsumego before coffee is not a good idea)

A bit tough to forget something which is not even available to see.

DrStraw wrote:

MagicMagor wrote:Edit: Forget what i wrote - i was wrong. (Doing tsumego before coffee is not a good idea)

A bit tough to forget something which is not even available to see.

Don't think about a pink elephant!