The board / chromatic number / #1091
Erdős Problem #1091
SOLVEDdatabase updated 2026-04-09
Resolved in some way other than a straight proof or disproof — usual for open-ended questions, or for multi-part problems whose parts went different ways.
What the community database records, not our verdict. erdosproblems.com no longer shows statuses (why).
Prizenone
Topicschromatic number, graph theory
Statement in Leannot yet
Solution in Leanno
Original pageerdosproblems.com/1091
Attempts
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