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Detailed Game Introduction

Solitaire 0-21 blends solitaire layout with arithmetic constraints. You place number cards to keep running totals within [0, 21]; modifiers (+/‑/×) and special effects complicate planning. Optimal play sequences safe placements while reserving room for spikes.

Gameplay Strategy & Walkthrough

1. [FR] Buffer space: Leave headroom near 21; don’t push totals to edges early.
2. [FR] Modifier timing: Spend multipliers only when totals allow safe absorption.
3. [FR] Row planning: Spread risk across rows; don’t stack volatility in one line.
4. [FR] Hold highs: Park high cards until you can offset with negatives.
5. [FR] Undo discipline: Undo immediately after noticing a boxed‑in row.

Controls Guide

• Click/drag to place cards; use undo/hints per UI.

Frequently Asked Questions (FAQ)

• Q: Totals keep busting.

A: You’re playing too close to 0/21 edges; leave cushion and pace modifiers.

• Q: Best way to use negatives?

A: Pair with highs to reset headroom on the same row.

• Q: Is luck dominant?

A: Draws matter, but placement strategy heavily impacts outcomes.