Strategy
Place signed numbers into two ledgers and keep their totals under control.
Place signed tiles across both ledgers for 18 turns.
Select the ledger for this tile.
Balancing the ledgers.
Placement resolved.
Resume when you are ready.
Place each signed number into the Left or Right Ledger. Keep the absolute difference between the ledger totals within the turn's hard limit through all 18 turns. Earn points for balance; a Breach scores no turn points but does not end the session.
Tap Left Ledger or Right Ledger to place the current tile. On desktop, press Left Arrow or A for Left, or Right Arrow or D for Right.
Exact (0): 120 points; Stable (1–2): 90; Tense (3–4): 55; Danger (5 through the turn's hard limit): 20; Breach (above the hard limit): 0. Exact and Stable build the combo; Tense, Danger, and Breach reset it. The combo multiplier applies to that turn's points, up to ×1.50. Complete all 18 turns for the breach-count and final-difference bonuses.
Estimate both totals after adding the signed tile, then compare their absolute difference with the current hard limit. Exact and Stable results build a combo; Tense, Danger, and Breach reset it. A small award that protects the ledger can be preferable to preserving a streak while crossing the limit.
On turn 7 the hard limit is 7. If the totals are Left 8 and Right 6 and the available tile has effective value +2, placing it on the Right makes both totals 8: difference 0, Exact, 120 base points. Placing it on the Left instead makes the difference 4: Tense, 55 base points.
Each tile changes one running total, while the hard limit tightens from 8 on turns 1–6 to 7 on turns 7–12 and 6 on turns 13–18. A Breach loses that turn’s points but does not end the session, so recovery and the final balance still matter.