Hi I need one serious game reviewed, as far as I concern I open good, if anybody could point out, at
which direction of the game that I did a lot of mistake, I feel like the game is equal but suddenly
my opponent get lots of area, many thanks

Hi wingly,

Between and , B already made some mistake
( hopefully other higher level folks can point out ).

Not the right way to play a ko threat --
this is a normal approach move to a 4-4: W can tenuki.
Instead, consider an attach: D17, or C16.
This way, your follow-up is continue with a second attach to his 4-4 stone.
This is very different from a double-approach to the 4-4...

...which you also missed. Even without any ko, is soft.
At least double approach ( C14 or D14 ).

Look at the whole board:
Upper Left corner: W gets a Better result than joseki,
thanks to , .

Lower left corner: your ko was a disaster for yourself;
you just gave W a HUGE corner.Up to here, Black gave up a lot to W.

K16.

Impossible. You must cut W (K16).

Trying to be fancy. No need -- just connect at K16.
See Toothpaste .

Very slow, very small -- almost a pass.

Again, small & slow; not looking at the whole board.

Again, small & slow; almost a pass.

, Classic Toothpaste .

Again, very slow & small -- almost a pass.

By now, White already has a huge lead; very difficult for Black.B had mistakes, slow and small moves ( as early as .. ),
and continued throughout the game to fall further and further behind.
White was ahead from early on; it was not sudden at all.

Very slow & small; also wrong direction: you didn't even block W (S13, instead).

119 Very small; almost a pass.

Biggest problems:

- Very slow & small moves: you basically Passed more than 6 times.

- Basic broken shapes. See Toothpaste .

- Life-and-death ( Lower Left corner ).

- More advanced problems: ko threats ( , ).