Convert Values to top 10 scale

Question

Here is the problem. I have four columns that I want to present in a select query. But, I want the RSV column to have a 10-1 scale instead of its + and - values. The greatest number +8,6 should get 10. Several of the values in the bottom can have 1. I have absolutley no idea how to solve this...

Nr is race horses start number. A race can also contain less than fifteen horses

    Nr  RPO    RSP     RSV

    1   10     9       +5,3
    2   9      10      +8,6 
    3   8      7       -2,7
    4   7      8       +3,8
    5   6      4       +4,3 
    6   5      6       -1,0
    7   4      5       +3,3
    8   3      1       +6,6
    9   2      1       +2,1
    10  1      1       +3,8
    11  1      3       +2,9
    12  1      2       -2,1
    13  1      1       +1,0
    14  1      1       -1,0
    15  1      1       +2,4
    

Last column shows the output:

               
Nr  RPO RSP RSV      RSVOutput
2   9   10  8,6      10
8   3   1   6,6      9
1   10  9   5,3      8
5   6   4   4,3      7
4   7   8   3,8      6
10  1   1   3,8      5
7   4   5   3,3      4
11  1   3   2,9      3
15  1   1   2,4      2
9   2   1   2,1      1
13  1   1   1        1
6   5   6   -1       1
14  1   1   -1       1
12  1   2   -2,1     1
3   8   7   -2,7     1

SELECT *
FROM rank
ORDER BY Nr

Answer 1

You could use something like this:

SELECT
  Nr, RPO, RSP, RSV,
  CASE WHEN @row>1 THEN @row:=@row-1 ELSE 1 END RSVOutput
FROM
  yourtable, (SELECT @row:=11) rows
ORDER BY
  RSV DESC

Please see fiddle here.