There's no such thing.
A look at the German National Team over the last 10 years shows only 1 Czech playing for them...Martin Reichel, who became a German citizen YEARS ago.
As for Russia, any player born in the Soviet Union who represented the Soviet Union is eligible to play for Russia (this covers that Kazakhstanian goaltender of theirs named Nabokov).
As for Tyler Myers, he was born in Texas, but raised in Alberta, and has been a Canadian citizen since he was 6. He chose to represent Canada instead of the US.
Under IIHF rules, a player can represent any country of which he is a citizen. Under IOC rules, a player can represent any country of which he is a citizen, provided he has not represented another country at the sports highest level previously (Petr Nedved declined a chance to play for Czechoslovakia as a 16 yr old because he knew at that time he would be defecting - he has since called playing for Canada in 1994 at the Olympics the biggest mistake of his life).
Since the Canada Cup/World Cup is an NHLPA sanctioned tournament, players are permitted to play for any country in which they are a citizen (Tony Esposito played for Canada in 76 and the US in 1984, Bryan Trottier played for Canada in 1981 and the US in 1984, Peter Stastny played for Czechoslovakia in 1976 and Canada in 1984 (and Slovakia at the 94 Worlds), Petr Nedved represented Canada at the 94 Olympics, and the Czech Republic at the 96 World Cup.
Mark Howe (Gordon), Marty Howe (Gordon), Ryan Malone (Gregory), Zach Parise (Jean Paul), Chris Bourque (Raymond Jean), and Eric Nystrom (Robert Thor) are all American citizens born in the US to Canadian citizens who have never moved back to Canada (Bob Nystrom is now dual Sweden/America having renounced his Canadian citizenship years ago).
Tyler Arnason and Nicholas Foligno are dual citizens born in the US to Canadians. Both men have since represented the US in IIHF tournaments.
Peter Stastny started out as a Czechoslovakian, became a Canadian (where Yan and Paul were born), and when he came to the States, he never became an American citizen but made sure that both Yan and Paul did. Since they became American citizens....Peter has since had his Czechoslovakian citizenship rolled over into Slovakian while retaining his Canadian citizenship (as has Stan Mikita). Yan has since renounced his Canadian citizenship for Slovakian (and is now a dual citizen with Slovakia (where he lives) and America) and Paul has stayed the course with dual Canadian/American citizenship.
Gordie Howe, Wayne Getzky, Mario Lemieux, Steve Yzerman, Mark Messier, Ron Francis all have dual American/Canadian citizenship (and Martin Brodeur joins that list next Monday).
Claude Lemieux recently became an American citizen, living in Phoenix (I hope he's a Coyote's season ticket holder) but forgot to fill out the paperwork to retain his Canadian citizenship. Oops...bye bye Claude!