I was pondering whether to play M10 or N10. Eventually, I found a good counter argument against the more tough looking N10:
- Click Here To Show Diagram Code
[go]$$Bcm61
$$ -----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O O . |
$$ | . . . O . . . . . . . . . O . X O X . |
$$ | . . . , . . . . . O . . . . . X X . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . . . X . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . 3 . . . |
$$ | . . X O . . . . . . . . 8 . 2 X . . . |
$$ | . X . O . . . . . , . 6 1 . . , . . . |
$$ | . X O . X . . . . . 7 5 4 O O X X . . |
$$ | . . . . . . . . . . O X X X O O O . . |
$$ | . . . . . . . . . . X O O X X O . . . |
$$ | . . X X . . . . . . . . . . O X X . . |
$$ | . . O X . . . . . . . . O . O . X . . |
$$ | . . O , . X . . . X . . . . . , . . . |
$$ | . . . O . . . . . . . . . . . X . . . |
$$ | . . . . . O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ -----------------------------------------[/go]
This is too easy for the white group. Therefore, M10 is more reasonable. Let's look at a few possible variations:
- Click Here To Show Diagram Code
[go]$$Bcm61
$$ -----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O O . |
$$ | . . . O . . . . . . . . . O . X O X . |
$$ | . . . , . . . . . O . . . . . X X . . |
$$ | . . . O . . . . . . . 3 . . . . . . . |
$$ | . . O . . . . . . X . . . . . X . . . |
$$ | . . X O . . . . . . . . . . . 9 . . . |
$$ | . . X O . . . . . . . . . . 5 4 7 . . |
$$ | . . X O . . . . . . . . . 2 . X 6 . . |
$$ | . X . O . . . . . , . 1 . . . 8 . . . |
$$ | . X O . X . . . . . . . . O O X X 0 . |
$$ | . . . . . . . . . . O X X X O O O . . |
$$ | . . . . . . . . . . X O O X X O . . . |
$$ | . . X X . . . . . . . . . . O X X . . |
$$ | . . O X . . . . . . . . O . O . X . . |
$$ | . . O , . X . . . X . . . . . , . . . |
$$ | . . . O . . . . . . . . . . . X . . . |
$$ | . . . . . O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ -----------------------------------------[/go]
Here, black was too greedy and careless. Therefore, if white jumps out, I have to somehow protect my upper right side (On a second view, black can probably still manage the attachment

by just extending to R11).
A variation, which I would like is the following:
- Click Here To Show Diagram Code
[go]$$Bcm61
$$ -----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O O . |
$$ | . . . O . . . . . . . . . O . X O X . |
$$ | . . . , . . . . . O . . . . . X X . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . . . X . . . |
$$ | . . X O . . . . . . . . . 4 . . . . . |
$$ | . . X O . . . . . . . . . . . 3 . . . |
$$ | . . X O . . . . . . . . . 2 . X . . . |
$$ | . X . O . . . . . , . 1 5 6 . . . . . |
$$ | . X O . X . . . . . . . . O O X X . . |
$$ | . . . . . . . . . . O X X X O O O . . |
$$ | . . . . . . . . . . X O O X X O . . . |
$$ | . . X X . . . . . . 7 9 0 8 O X X . . |
$$ | . . O X . . . . . . . . O . O . X . . |
$$ | . . O , . X . . . X . . . a . , . . . |
$$ | . . . O . . . . . . . . . . . X . . . |
$$ | . . . . . O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ -----------------------------------------[/go]
Black can finally play (a) and it's hard to see what the lower white group is going to do.
White can also try to attach the M10 stone but thanks to the extra liberty on O6, there is no big danger:
- Click Here To Show Diagram Code
[go]$$Bcm61
$$ -----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O O . |
$$ | . . . O . . . . . . . . . O . X O X . |
$$ | . . . , . . . . . O . . . . . X X . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . . . X . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . 3 . . . X . . . |
$$ | . X . O . . . . . , . 1 2 . . . . . . |
$$ | . X O . X . . . . . 5 4 . O O X X . . |
$$ | . . . . . . . . . . O X X X O O O . . |
$$ | . . . . . . . . . . X O O X X O . . . |
$$ | . . X X . . . . . . . . . . O X X . . |
$$ | . . O X . . . . . . . . O . O . X . . |
$$ | . . O , . X . . . X . . . a . , . . . |
$$ | . . . O . . . . . . . . . . . X . . . |
$$ | . . . . . O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ -----------------------------------------[/go]
Black can easily escape and white is still somehow in trouble.
However, these variations are all too easy and white would probably play the other way round:
- Click Here To Show Diagram Code
[go]$$Bcm61
$$ -----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O O . |
$$ | . . . O . . . . . . . . . O . X O X . |
$$ | . . . , . . . . . O . . . . . X X . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . . . X . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . X . . . |
$$ | . X . O . . . . . , . 1 . . . . . . . |
$$ | . X O . X . . . . . . . . O O X X . . |
$$ | . . . . . . . . . . O X X X O O O . . |
$$ | . . . . . . . . a 3 X O O X X O . . . |
$$ | . . X X . . . . . 4 2 . . . O X X . . |
$$ | . . O X . . . . . . . . O . O . X . . |
$$ | . . O , . X . . b X . . . . . , . . . |
$$ | . . . O . . . . . . . . . . . X . . . |
$$ | . . . . . O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ -----------------------------------------[/go]
This position is a bit annoying. If I push further at a, w can attach at b, threaten my single stone and eventually connect to lower left group or get alive elsewhere. If I protect at H4 instead, the following would happen:
- Click Here To Show Diagram Code
[go]$$Bcm61
$$ -----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O O . |
$$ | . . . O . . . . . . . . . O . X O X . |
$$ | . . . , . . . . . O . . . . . X X . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . . . X . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . X . . . |
$$ | . X . O . . . . . , . 1 9 . . . . . . |
$$ | . X O . X . . . 0 . 8 . . O O X X . . |
$$ | . . . . . . . . . 7 O X X X O O O . . |
$$ | . . . . . . . . 6 3 X O O X X O . . . |
$$ | . . X X . . . . . 4 2 . . . O X X . . |
$$ | . . O X . . . . . . . . O . O . X . . |
$$ | . . O , . X . 5 . X . . . . . , . . . |
$$ | . . . O . . . . . . . . . . . X . . . |
$$ | . . . . . O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ -----------------------------------------[/go]
I definitely have to reply at

in this variation, otherwise white plays M9 and my cutting stones are gone (and I could finally resign and read all of your nice comments...

). But if I reply, then the net at

is quite big.
Therefore I finally abandoned M10 / N10 and try something completely different:
- Click Here To Show Diagram Code
[go]$$Bcm61
$$ -----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O O . |
$$ | . . . O . . . . . . . . . O . X O X . |
$$ | . . . , . . . . . O . . . . . X X . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . . . X . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . X . . . |
$$ | . X . O . . . . . , . . 7 . . . . . . |
$$ | . X O . X . . . . . 1 . . O O X X . . |
$$ | . . . . . . . . . 2 O X X X O O O . . |
$$ | . . . . . . . . . . X O O X X O . . . |
$$ | . . X X . . . . . . 3 5 6 4 O X X . . |
$$ | . . O X . . . . . . . . O . O . X . . |
$$ | . . O , . X . . . X . . . . . , . . . |
$$ | . . . O . . . . . . . . . . . X . . . |
$$ | . . . . . O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ -----------------------------------------[/go]
After w defends L8, black blocks at L6.

threatens the cutting stones, but the kikashi

prevents white to get an eye easily. Finally,

is a good defense which also keeps the pressure on white.
If w allows the ponnuki I could prevent the attachment / connection around K4 one move earlier:
- Click Here To Show Diagram Code
[go]$$Bcm61
$$ -----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O O . |
$$ | . . . O . . . . . . . . . O . X O X . |
$$ | . . . , . . . . . O . . . . . X X . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . . . X . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . X . . . |
$$ | . X . O . . . . . , . . . . . . . . . |
$$ | . X O . X . . . . . 1 . . O O X X . . |
$$ | . . . . . . . . . 3 . X X X O O O . . |
$$ | . . . . . . . . . . X O O X X O . . . |
$$ | . . X X . . . . . 4 2 . . . O X X . . |
$$ | . . O X . . . . . . . . O . O . X . . |
$$ | . . O , . X . 5 . X . . . . . , . . . |
$$ | . . . O . . . . . . . . . . . X . . . |
$$ | . . . . . O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ -----------------------------------------[/go]
This position looks still quite ok for black. Of course there are even more possibilities. First, there is an ugly squeeze variation:
- Click Here To Show Diagram Code
[go]$$Bcm61
at 
$$ -----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O O . |
$$ | . . . O . . . . . . . . . O . X O X . |
$$ | . . . , . . . . . O . . . . . X X . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . . . X . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . 0 . . . X . . . |
$$ | . X . O . . . . . , . 7 6 . . . . . . |
$$ | . X O . X . . . . . 1 4 5 O O X X . . |
$$ | . . . . . . . . . 2 O X X X O O O . . |
$$ | . . . . . . . . . . X O O X X O . . . |
$$ | . . X X . . . . . . 3 . . 8 O X X . . |
$$ | . . O X . . . . . . . . O . O . X . . |
$$ | . . O , . X . . . X . . . . . , . . . |
$$ | . . . O . . . . . . . . . . . X . . . |
$$ | . . . . . O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ -----------------------------------------[/go]
White squeezes black towards upper left direction. It seems that black can somehow survive this (also the

stone may be quite helpful here) but I do not like it. Therefore, the alternative to

in this variation is
- Click Here To Show Diagram Code
[go]$$Bcm61
$$ -----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O O . |
$$ | . . . O . . . . . . . . . O . X O X . |
$$ | . . . , . . . . . O . . . . . X X . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . O . . a . . . X . . . . . X . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . . . . . . . X . . . |
$$ | . X . O . . . . . , 8 . . . . . . . . |
$$ | . X O . X . . . . . 1 4 6 O O X X . . |
$$ | . . . . . . . . . 2 O X X X O O O . . |
$$ | . . . . . . . . . . X O O X X O . . . |
$$ | . . X X . . . . . . 3 7 5 . O X X . . |
$$ | . . O X . . . . . . . . O . O . X . . |
$$ | . . O , . X . . . X . . . . . , . . . |
$$ | . . . O . . . . . . . . . . . X . . . |
$$ | . . . . . O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ -----------------------------------------[/go]
This way, black captures M7/N7 but the other of white's split groups gets a strong wall with a stone captured in a ladder. The bonus for black is that the lower right side get quite big (>50 points unless white finds some very magic tricks). In the following, I could play a ladder-breaker around (a) and see what happens.