Queens 4 (difficulty: easy)

Place 4 queens on a 4x4 chess board such that they don't attack each other

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Best Scores

• 0.0, with method ngq, submitted by user: 11
• 0.0, with method qubo2minizinc then coin-bc, submitted by user: 2
• 2.0, with method qbsolv (tabu search), submitted by user: 2