I'm using the command blat with 

-minScore=60

and my file has all 60 base DNA sequences. They are actually microarray probes.

My version is

$ blat
blat - Standalone BLAT v. 34 fast sequence search command line tool

The documentation further down the screen says 

-minScore=N sets minimum score.  This is the matches minus the mismatches minus 
some sort of gap penalty. Default is 30

How can I possibly be getting any matches less than 60 bases then ?

$ head -n 15 result.psl | cut -f 1,2 -

match   mis- 
        match
---------------
60      0
60      0
58      1
51      0
59      0
58      1
58      1
56      3
55      3
58      1

--------------------------------------
Dario Strbenac
Research Assistant
Cancer Epigenetics
Garvan Institute of Medical Research
Darlinghurst NSW 2010
Australia
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