| Years | Bordering Country | % Correct |
|---|---|---|
| 1871-1938, 1949- | Germany | 100%
|
| 1861-1938, 1945- | Italy | 100%
|
| 1993- | Czechia | 91%
|
| 1866 | France | 91%
|
| 1918-1938, 1945- | Hungary | 91%
|
| 1993- | Slovakia | 91%
|
| 1991- | Slovenia | 91%
|
| 1815-1938, 1945- | Switzerland | 91%
|
| 1918-1938, 1945-1993 | Czechoslovakia | 82%
|
| 1815-1938, 1945- | Liechtenstein | 82%
|
| 1878-1918 | Romania | 82%
|
| 1815-1918 | Russia | 82%
|
| 1878-1918 | Serbia | 82%
|
| 1815-1871 | Bavaria | 73%
|
| 1815-1913 | Ottoman Empire | 73%
|
| 1815-1866 | Prussia | 73%
|
| 1918-1938, 1945-1991 | Yugoslavia | 73%
|
| 1815-1918 | Montenegro | 55%
|
| 1815-1859 | Papal States | 55%
|
| 1815-1866 | Saxony | 55%
|
| 1815-1859 | Modena | 36%
|
| 1866-1871 | North German Confederation | 36%
|
| 1815-1859 | Parma | 36%
|
| 1815-1861 | Sardinia | 36%
|
| 1901-1917 | China | 27%
|
| 1815-1846 | Free City of Cracow | 27%
|
| 1859-1860 | United Provinces of Central Italy | 27%
|