World Othello Federation, Official Site

This source backs 38 claims across the atlas. As facts: 25 well-attested. As cited relationships: 3 holds, 4 connected. Plus 6 entities citing it as a general reference with no single fact or relationship attached.

Disposition By Topic

• Competitions, 11 claims: 8 well-attested, 1 holds, 1 connected, 1 general references.
• Governing Bodies, 10 claims: 7 well-attested, 2 holds, 1 general references.
• Articles, 9 claims: 3 well-attested, 3 connected, 3 general references.
• Sources, 5 claims: 5 well-attested.
• Games, 3 claims: 2 well-attested, 1 general references.