Screw in the first floorboard but avoid underfloor heating pipes

[gluecifer]

I'm planning to install a wooden floor next to an adjacent room that already has one, and ideally, I want the boards in both rooms to meet exactly edge to edge with some kind of threshold list. I feel that'll look the best.

That means the first board has to be cut lengthwise, and I'll screw or nail it down right close to the wall, but it's very risky to screw into the tongue since the floor heating pipe gets in the way.
Does anyone have any suggestions for a solution?

For example, should I not worry about the boards being uneven as they will be covered by a wide list anyway, and avoid cutting the first board so it extends further from the wall, or could I glue just this first board?
It's possible to screw straight down, it's just when you angle the screw that it becomes a problem. But you don't want visible screws either...

see pictures with a test piece of the floorboard

 

[gluecifer]

A slightly cumbersome way could be to insert 45x45 blocks between the studs and screw down into them, between the studs and not on the studs where the pipe goes....

If anyone else has ideas, I would be extremely grateful

 

[Strip]

Eh, glue board #1 with board #2? It's right along a wall and you're not likely to dance there. Maybe shortla at the door...

Edit: I should probably add that I have no idea if it's a good idea or not.

 

[b8q]

If you screw/nail the split floorboard closest to the wall, and then glue it to board 2, I think you're safe.

 

[gluecifer]

In the end, I placed noggings between the studs and screwed them down there, instead of in the studs where the pipe was. Turned out so damn good.