Efficiency
Efficiency measures how precisely you solve a board. A 100% score means every click contributed to clearing the board - no wasted moves.
Formula
What is 3BV?
How to Increase Efficiency
Chord aggressively. Clicking a number with adjacent flags matching opens multiple cells in one click - the primary way to exceed 100%.
Use NF technique. Avoid placing unnecessary flags. Every flag is a wasted click unless it enables a chord.
Think ahead. A single well-timed chord can open 5+ cells. Plan your next two moves before clicking.
Avoid wasted clicks. Clicking already-revealed cells or empty space wastes moves and drops your efficiency.
Key Points
- Efficiency of 100% means zero wasted clicks - every left-click directly revealed a new cell.
- Chording is the only way to exceed 100% - one click reveals multiple cells simultaneously.
- Boards with 3BV below the minimum are excluded from ranked records and trophy calculations.
- The Orange shard in events scores purely on efficiency - a 110% game beats five 80% games.
- Efficiency is tracked per difficulty - your Expert record and Beginner record are separate.
Techniques Compared
Two main techniques determine your efficiency ceiling. No-Flag (NF) play skips flagging entirely - every click is a reveal. Chord play uses a minimal number of flags placed only to enable chords. A pure chord player on Expert can achieve 130–160% efficiency by opening 3–5 cells per chord across a board. NF players typically land 95–105%.
- Chord on "1s" near edges. Edge and corner "1" numbers surrounded by a single flag are the easiest chords - fast to spot, always worth taking.
- Skip flagging in open areas. In a wide open section you can chord-cascade without flags by using double-click (chord on any satisfied number).
- Review your replay. After each game, check where your efficiency dropped. Usually it's 2–3 accidental blank clicks or missed chord opportunities.