[Albion Wilde]

Is that George V or Czar Nicolas, his lookalike cousin?

[Billthedrill]

Georgie in the bottom center, I'm pretty sure. Here's what the History Channel site calls it:

Standing, from left to right: King Haakon VII of Norway, Tsar Ferdinand of the Bulgarians, King Manuel II of Portugal and the Algarve, Kaiser Wilhelm II of Germany and Prussia, King George I of the Hellenes and King Albert I of the Belgians.

Seated, from left to right: King Alfonso XIII of Spain, King George V of the United Kingdom, and King Frederick VIII of Denmark.

More kings than a good game of checkers...