Nullmove R=2/3 definition question

[Vladimir Medvedev]

When you write R=2, what do you mean?

...
MakeNullMove();
e = Search( ..., depth - 1 - 2 );
UnmakeNullMove();
...

or

...
MakeNullMove();
e = Search( ..., depth - 2 );
UnmakeNullMove();
...

What is the "standard" definition?

[smcracraft]

When you write R=2, what do you mean?

...
MakeNullMove();
e = Search( ..., depth - 1 - 2 );
UnmakeNullMove();
...

or

...
MakeNullMove();
e = Search( ..., depth - 2 );
UnmakeNullMove();
...

What is the "standard" definition?

It is the first of the above, specifically

...
... search(depth-1-R)
...

Stuart