| Year | Country | % Correct |
|---|---|---|
| 1918,1945 | United Kingdom | 100%
|
| 1918,1945 | United States | 100%
|
| 1214,1648,1678,1684,1791,1797,1918,1945 | France | 97%
|
| 1918 | Italy | 97%
|
| 1945 | Soviet Union | 97%
|
| 1018,1060,1109 | Poland | 91%
|
| 985* | Norway | 85%
|
| 1918 | Belgium | 79%
|
| 1852 | Denmark | 79%
|
| 1648 | Sweden | 79%
|
| 1031,1046,1052,1488 | Hungary | 76%
|
| 1918 | Portugal | 76%
|
| 1945 | Canada | 73%
|
| 1648 | Netherlands | 73%
|
| 1945 | Australia | 61%
|
| 1918 | Japan | 61%
|
| 1499 | Old Swiss Confederacy | 55%
|
| 1140 | Czechia | 52%
|
| 1046 | Kievan Rus | 3%
|