Ian Butters's Compositions

23456   M  w  m  W  H
34256               2
53246            -  3
62345   -        3  -
24536   -        2
43265         a     3
45362   2  -     -  -
36452   3        -  -
63254   3  -  -  -  -
23456   -            

4th place calls.
Lower case letters are half-lead equivalent calls (w=6?, m=7? -
these refer to calling position in plain course).
NB, half-lead calls are CAB (rather than BCA) coursing order transposition.
a = I,V.