zebra (difficulty: difficult)

The classical logic puzzle. QUBO derived from a SAT implementation available here https://people.sc.fsu.edu/~jburkardt/data/cnf/zebra_v155_c1135.cnf

Download QUBO Explanation of the file format

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Best Scores

• 2.0, with method ngq, submitted by user: 11
• 1287.0, with method mlqaoa, submitted by user: 12