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OT7 preference lab
BTS Bias Sorter
Trust your instinct, map your full OT7 order, or solve today’s competitive lineup. Four modes, one very difficult question.
Looking for compatibility instead of preference? Try the Bias Test, then compare its answer with your #1 here.
Mystery Lineup leaderboardSee today’s best logic scores→How the new Bias Sorter works
Pick the depth that fits your mood
Quick Pick finds a current favourite in six taps. OT7 Sort uses a smart merge sort to build all seven positions in at most 14 choices. Deep Sort asks every possible matchup, then adds three pressure-test duels for the most deliberate result.
Practice is personal, Daily is competitive
Your own preferences are never treated as right or wrong. Quick Pick, OT7 Sort, and Deep Sort are guest-friendly practice modes. Mystery Lineup Daily is different: it is an objective clue puzzle with one scored completion per KST day and up to 1,000 League Points.
Daily score is verified
Each daily stage has one complete lineup implied by its clues. Partial agreement earns partial points, and the server rebuilds the same puzzle before accepting a score. Your time only breaks ties; it does not replace accuracy.
Your full ranking stays shareable
OT7 and Deep results become a 4:5 image and a compact result link. Your most recent full order stays on this device so you can revisit it without an account.