Overview
zero21-solitaire distills arithmetic into lane management: you play cards to keep totals within safe bounds while opening routes for future moves. The trick is sequencing—use small increments to set up larger jumps, save reducers for spikes, and avoid painting yourself into corners with greedy plays. Visual clarity keeps math readable, and feedback is honest: a bust says you ignored an escape card, a stalled lane means you prioritized the wrong side. Satisfying runs feel composed—totals hover near center, options remain, and late spikes get absorbed because you kept flexibility. It’s solitaire edited into a clean number puzzle where planning beats luck.