| Country | Borders | # Borders | % Correct |
|---|---|---|---|
| United States | Canada, Mexico | 2 | 99%
|
| Japan | – | 0 | 97%
|
| Ireland | United Kingdom | 1 | 97%
|
| Portugal | Spain | 1 | 94%
|
| Yemen | Oman, Saudi Arabia | 2 | 93%
|
| Haiti | Dominican Republic | 1 | 92%
|
| Panama | Costa Rica, Colombia | 2 | 91%
|
| Mexico | Belize, Guatemala, United States | 3 | 90%
|
| Madagascar | – | 0 | 84%
|
| Chile | Argentina, Bolivia, Peru | 3 | 83%
|
| Papua New Guinea | Indonesia | 1 | 81%
|
| San Marino | Italy | 1 | 78%
|
| Nepal | China, India | 2 | 76%
|
| Tunisia | Algeria, Libya | 2 | 73%
|
| Estonia | Latvia, Russia | 2 | 71%
|
| Vietnam | Cambodia, China, Laos | 3 | 70%
|
| South Korea | North Korea | 1 | 69%
|
| Belgium | France, Germany, Luxembourg, Netherlands | 4 | 61%
|
| Greece | Albania, Bulgaria, North Macedonia, Turkey | 4 | 50%
|
| Italy | Austria, France, San Marino, Slovenia, Switzerland, Vatican City | 6 | 47%
|