International Chess Day (Wikipedia)

This source backs 20 claims across the atlas. As facts: 13 well-attested. As cited relationships: 1 connected. Plus 6 entities citing it as a general reference with no single fact or relationship attached.

Disposition By Topic

• Observance Rules, 9 claims: 6 well-attested, 1 connected, 2 general references.
• Holidays, 5 claims: 3 well-attested, 2 general references.
• Articles, 4 claims: 2 well-attested, 2 general references.
• Sources, 2 claims: 2 well-attested.