Feature maps size from stage 3

[MBMS80]

Hi Nico,
As is original ResNet you mentioned:

Note that from stage 3, the first conv layer at main path is with subsample=(2,2)
And the shortcut should have subsample=(2,2) as well"

But then in the solution, you used strides=(1,1). So, feature maps are 63*63.
Is there any intuition behind that?