As EdLee says, you need to improve your fundamentals to become stronger.
Let's look at move 27 in depth. As Magicwand says, it is no good. But why not? Its time for a quick lesson in fundamentals.
Here is the basic shape, three in a row. How many liberties does it have?
$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .[/go]
If you count them, there are eight.
Now if we add the marked move below, how many liberties does it have?
$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X 1 . . .
$$. . . . X . . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X 1 . . .
$$. . . . X . . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .[/go]
Contrary to a beginner's intuition, this is not an improvment. There are still eight liberties. The down side is that black has spent a move, added one more stone to the potential victims, and has not made his group safer. ( All other things being equal, more liberties makes a group harder to kill )
The up side is nothing. No eye space, no inprovement in liberties.
There are other ways to improve the basic 3-stone group. Let's first look at the solid connections:
$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . 1 . . . .
$$. . . . . . . . .
$$. . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . 1 . . . .
$$. . . . . . . . .
$$. . . . . . . . .[/go]
This increases liberties from 8 to 10. Unfortunately it is not a legal move for you here, but it is something to remember.
Becoming a 4-stone wall is one of the things that a 3-stone wall wants to do. It wants to do that because it gains more liberties than any other solidly connected move.
$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . X 1 . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . X 1 . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .[/go]
This increases liberties from 8 to 9. It is not much of an improvement, but better than nothing.
Those ( and their mirrors and rotations ) are all of the possibilities for increasing your 3-stone group with a solidly connected stone. So now let's consider the moves further out.
We can't go too far away, for then the move can be separated, like this:
$$B
$$. . . . . . . . . .
$$. . . . . . . . . .
$$. . . . X . . . . .
$$. . . . X . 2 . 1 .
$$. . . . X . . . . .
$$. . . . . . . . . .
$$. . . . . . . . . .
$$. . . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B
$$. . . . . . . . . .
$$. . . . . . . . . .
$$. . . . X . . . . .
$$. . . . X . 2 . 1 .
$$. . . . X . . . . .
$$. . . . . . . . . .
$$. . . . . . . . . .
$$. . . . . . . . . .[/go]
The best moves are usually like this:
$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X a . 1 .
$$. . . . X . . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X a . 1 .
$$. . . . X . . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .[/go]
Or this:
$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X a 1 . .
$$. . . . X . . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . . . .
$$. . . . X a 1 . .
$$. . . . X . . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .[/go]
These tend to be best because they are close enough that they are hard for the opponent to separate, and the space around 'a' is starting to look like an eye. Usually the choice between the last two depends upon how congested the local area is. If there are lots of enemy stones nearby, play the second one because it is a stronger connection; if there are few enemey stones nearby, play the first one for it grabs more territory in the long run.
Note that the suggested moves are symetrical. There us a reason for that. We could play moves like this:
$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . 1 . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . 1 . .
$$. . . . X . . . .
$$. . . . X . . . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .[/go]
but they are not as flexible, for the opponent can destroy their potential eye space in one move like this:
$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . 1 . .
$$. . . . X . . . .
$$. . . . X . 2 . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . X . 1 . .
$$. . . . X . . . .
$$. . . . X . 2 . .
$$. . . . . . . . .
$$. . . . . . . . .
$$. . . . . . . . .[/go]
...whereas the symetrical move has miai for eye space:
$$B
$$. . . . . . . . .
$$. . . . . . 2 . .
$$. . . . X . . . .
$$. . . . X . 1 . .
$$. . . . X . . . .
$$. . . . . . 3 . .
$$. . . . . . . . .
$$. . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B
$$. . . . . . . . .
$$. . . . . . 2 . .
$$. . . . X . . . .
$$. . . . X . 1 . .
$$. . . . X . . . .
$$. . . . . . 3 . .
$$. . . . . . . . .
$$. . . . . . . . .[/go]
If the opponent tries to destroy eye space on one side, we then start making eye space on the other side.