[Scidb-users] Curiosity in ECO file

[Gregor Cramer]

I've detected a curiosity in the ECO file of Scid:

        1.d4 Nf6 2.c4 e6 3.Nf3 c5                               will be 
assigned to E10
        1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5          will be assigned to A60
        1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5       will be assigned to E10

This is not looking logical. Does anybody have an explanation for
this? A line like "1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 a6" will be assigned
to A60, and this is logical. Why this exception for 4...b5?

Cheers,
Gregor