Play sharper.
Score smarter.

Strategy guides and free practice tables for real-money skill games: 21 Blitz, Blackout Bingo, and Solitaire Cube on Skillz, plus Word Cube 3 on Cash Out Club. Practice is free. The guides sell the tested judgment.

Independent research. Not affiliated with Skillz, Cash Out Club, or any game publisher.

Secure Gumroad checkout · instant PDF download

How the lab works

No vibes.
Run the reps.

Every recommendation has to survive the same three classes: rules, controlled comparisons, and a human-speed reality check. All of it is post-game learning. No bots, no overlays, no live-match help.

  1. LAB 01

    Rebuild it

    Turn scoring, timing, controls, and edge cases into an engine that can be challenged.

  2. LAB 02

    Hold the deal still

    Make strategies face the same deck, calls, or tiles so the better decision has nowhere to hide.

  3. LAB 03

    Make it playable

    Compress the edge into fast rules, drills, and examples a real person can recall under a clock.

From the lab notebook

The five-card trap

In 21 Blitz, a five-card stack pays a real 1.5× premium. The obvious move is to build toward it. I tested that assumption on 120 paired decks, same shuffles for both strategies, so deck luck is removed from the comparison. The player that ignored the bonus and valued every clear equally came out ahead: about one more clear per game (12.78 vs 13.75), about a quarter of a bust fewer per game (1.68 vs 1.43), and a three-bust-out rate of 31% vs 39%. The guide's rule: let five-card bonuses happen to you.

120 paired decks · same shuffles · 21 Blitz simulator0%20%40%Three-bust-out rate39%Chasesfive-card31%Values everyclear equally
Read a free sample: how the 21 Blitz guide was derived (PDF)

What's inside a guide

Page from the 21 Blitz guide: column role and strategy table
Page from the 21 Blitz guide: board state variables reference
Page from the Solitaire Cube guide: score model breakdown

Real pages from the guides. Worked examples, drills, and a research appendix in every one.

Choose your course

Pick your next level-up.

Each guide teaches a compact decision system. Each free trainer gives you somewhere enjoyable to build the reflex.

Research desk

Latest from the lab

All research

21 Blitz ·

The 600-Point Trap in 21 Blitz

The five-card stack pays 600, yet chasing it loses games. A simulation of 120 paired deals shows why valuing every clear equally works better.

The school rule

Play free.
Pay for the edge.

FREE

Practice the mechanics

Learn the controls, pace, and scoring feedback in complete browser trainers. No download, no account.

Browse the arcade
PRO

Understand the decisions

Get the tested strategy, worked positions, drills, and post-game review system for the games you play.

See the guides

Email updates

Get new research and guide updates

Join the Skill Game School email list for occasional research notes, practice ideas, and product updates.

Free · occasional

Email delivery is managed by Gumroad. Unsubscribe anytime. Prefer Gumroad? Subscribe there.