Let's say you set these preferences:

• Strategy: 3 (you like strategy games)
• Competition: 4 (you love competitive games)

A game has these scores:

• Strategy: 2 (difference: |3-2| = 1)
• Competition: 5 (difference: |4-5| = 1)

Total difference: 1 + 1 = 2

Max possible difference: 10 (2 criteria × 5 points max)

Similarity: 100 × (1 - 2/10) = 80%