Stuck! One for the advanced techniques

[JulieC]

I am currently stuck on this puzzle. I'm going to go through the advance technique suggestions and see if I can find something, but half in the interest of getting unstuck and half in the interest of providing a really hard one for those that enjoy them, here you go:

[JulieC]

Additional X's, though no help:

X for Cerbel+Canada
X for Irskela+Tibet

[zenobia43]

Clue 7 states that 1989 is Switzerland or 100.

From your grid, we see that 100 cannot be Canada or Nigeria.

And that means 1989 will not be Canada or Nigeria. Copy those two Xs from the 100 row straight down to the 1989 row. Nigeria will only have one choice after those Xs are placed.

Hope that helps!

[JulieC]

And that did it. Thank you, zenobia43!