blade90 wrote:Are there some moves I should avoid making or did I play some small points?
Daniel covered the problems with your play on the left side, which should be the main lesson from this game. If you really get this, you will become a few stones stronger. Just to reinforce the lesson, with slightly different emphasis:
Your first move (D9 shoulder hit) was fine. As you mention, you can view this as a probe. W had several choices in response to this probe -- push up at D10, jump to F6, connect under at C9. The first two choices would be aggressive and would commit you to a running fight with the D9 stone. However, W chose a submissive move, playing beneath your stones to make a small territory. Because W answered submissively, you can treat your initial probes as useful forcing moves, which have already served their purpose and do not require further investment. So I disagree a little with Daniel here; tenuki at move 20 is not necessarily bad. Still, it would be more consistent to complete your wall by adding stones at D7 (sente) and E6 (gote), and I think that would actually be the best continuation in this game.
The real problem comes just one move later, when W adds a reinforcing stone at D7. This thick move handcuffs your two stones, leaving them no future prosepects for useful development, either for attack or to make thickness or to make territory. W apparently thought this result was worth a full move, and he may have been correct. Now here comes the lesson: your first reaction to this move should not be "how can I rescue these poor stones" but rather "how can I sacrifice these now worthless stones". You might even secretly be pleased that W has saved you from the difficult decision of how to develop these stones.
Jumping out to F9 is not the worst move in this game, but it deserves the most criticism, since it is a mistake in strategy and direction. You have just created a group which is too large to sacrifice, still makes no thickness or territory for you, and is likely to become a burden for the rest of the game. While W attacks from the E11 direction, he will make territory; while W attacks from the F6 direction, he will erase potential B territory. Meanwhile, your center stones will be doing nothing but surviving.
Contrast this with a strategy of giving up the two stones, maybe even actively forcing W to capture them on a small scale. For example, you might have an opportunity to play moves like F6 or G7, building up a moyo in the right center. If W responds by completing the capture of your two stones, that would be a good exchange.