Not blurring notes- need urgent help

[mozartnoob]

Only 2 weeks till auditions for a talent show, prize 1000$. Buy i have been very busy with exam prepaerations. So my mozart sonata 12 has taken a backseat. I have been reviving it and the 2nd and 3rd movements are perfect. However, part of the first movement is terroble and blurry- the episodr. I have tried everything- playibg slowly, changing fingering etc, but it always is blurred and the notes mash up into one uneven blob of ugly sound that sounds nothing like the recordings i hear. Any help appreciated- note it is sonata 12 f major k332 by mozart bars 31-36- before i was playing it smoothly at tempo and even faster, but after exam prep it has gone backwards

[nickc]

How is your relaxation? If you are tense or nervous, it will have a hug impact on your sound.

[distantfieldrelative]

How much pedal are you using?

[kawai_cs]

Beautiful sonata you picked:-) I would love to play this one myself.
For me, when I start blurring notes slow practice helps. I practice slow, forte and pesante.

[jimroof]

I have never really heard the term 'blurring' notes.  I think we need to know exactly what that sounds like to be of assistance.

If blurring means too much pedal then the fix is obvious...

If blurring means rhythmic inconsistency (probably at least a component, even if it is #3...) then slow practice is critical.

But, blurring might ALSO be the result of uneven passage work.  This could include inconsistent volume per each note (heavy 1-3 and weak 4-5) OR, something a little more subtle, uneven RELEASE.  If your 4th finger is not getting off of its note in the same manner as the rest of your fingers then a good ear will hear that and it will sound like those notes are bleeding into the lines.

Regardless, the answer is almost always going to be slow practice - AIDED by a proper diagnosis.  Slow work is a waste of time IF you are making the same mistake SLOWLY as you made up to tempo.  The release issue MIGHT sound better at a slow tempo simply due to the natural decay of the note. 

So, I would suggest slow practice with attention to the attack, volume AND RELEASE.

[benjdod]

I've played this one for a competition as well and it's a fun one.  The thing that I noticed is that my arm weight was uniform and produced a completely flat tone.  I'd suggest about the same as kawai_cs: slow slowly and forte.  Also (if you're blurring the way I think you are by using overly relaxed releases), I'd try to incorporate an earlier release into your technique to keep your articulation a little clearer.  You can also try to add more shape to the line; maybe a crescendo to the top note of each one. 

TL;DR: Slow practice, earlier releases.  Add some shape if you have time or want too.

[piulento]

This is a pretty tricky passage to play properly.
First of all, as already suggested, practice is slowly, with no pedal, and make sure every note is well heard. After that, start puting more emphasis on the "main notes". For instance, in the C minor part, the main notes are the first C, the first E flat, and the first high G (I hope you understand what notes I'm talking about). In each part of this passage you play, when the main notes arrive, put a bit more emphasis on them. Use them to "anchor" the beat so it doesn't sound that mashed up. Also, make sure you emphasize the first note in the left hand in each bar.
Good luck.