Skillz
$9 · PDF + companion
21 Blitz
Build safer board shapes, clear naturally, and stop turning good decks into bust-outs.
Practice free: Column 21Independent skill-game education
Strategy guides.
Free practice.
Learn the scoring, work through real positions, and practice the decisions for 21 Blitz, Blackout Bingo, Solitaire Cube, and Word Cube 3.
PDF guides · $9 each. Browser practice · no account, download, or entry fee.
Not affiliated with Skillz, Cash Out Club, or any game publisher. For practice and post-game learning.
The free practice games
Play in your browserOur own trainers, built around the mechanics of the games below.
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PDF guides · $9 each. Strategy, worked examples, and a printable practice companion included.
Skillz
$9 · PDF + companion
Blackout Bingo
Turn fast daubs into more points, more boosts, and cleaner rare pattern payouts.
Practice free: Bingo SprintSkillz
$9 · PDF + companion
Solitaire Cube
Open the board quickly, recognize dead deals earlier, and bank the clock before it disappears.
Practice free: Klondike ClockCash Out Club
$9 · PDF + companion
Word Cube 3
Score more per turn and more per second: read the board first, chase the length bonus, and land expensive tiles on premium squares.
Practice free: Crossword GridAll 4 guides · $21 once
Every strategy guide and printable companion. Save $15 against buying the guides separately ($36 total).
See everything in the bundleBuy the bundle · $21
Gumroad checkout · instant PDF delivery
How the guides are researched
Game models, controlled comparisons, and rules you can use at human speed.
- 01
Check the rules
Reproduce scoring, timing, and edge cases in an executable game model.
- 02
Compare the decisions
Test strategies on the same decks, calls, or tiles to separate decisions from luck.
- 03
Build practical drills
Turn the findings into worked examples, printable exercises, and post-game review.
An example from the 21 Blitz research
When chasing a bonus backfires
In our simulator, valuing every clear equally beat deliberately chasing five-card bonuses. Across 120 paired decks, it produced more clears and fewer bust-outs.
These are simulator results on matched shuffles, not a promise of winnings or real-player outcomes.
Read the research method- Chase five-card bonuses
- 39%
- Value every clear equally
- 31%
Bar lengths use a 0–100% scale. Lower is better.
Actual pages from the guides
Open a page to read it at full size.
Before you buy
- What do I receive?
- A PDF strategy guide and a printable companion, delivered through Gumroad. Guides are one-time purchases of $9 each. The complete bundle is a one-time $21 purchase.
- Is practice really free?
- Yes. All 4 browser trainers are free, with no account required. The guides teach the strategy and manual post-game review; an automated advisor is not included.
- What if it is not for me?
- Guides have a 14-day refund period. You can inspect the free research notes and try the practice games before buying.
- Can I use this during a match?
- Use the materials for practice and post-game learning. They provide no bots, overlays, or assistance during a live real-money match.
From the research notes
All researchWord Cube 3 ·
How Word Cube 3 Scoring Works: Tile Values, the Length Bonus, and Points Per Second
Word Cube 3 plays like speed Scrabble on Cash Out Club, but its scoring has a few quirks that decide games. A breakdown of tile values, the length bonus, and why the clock is worth points.
21 Blitz ·
The 600-Point Trap in 21 Blitz
A five-card clear below 21 pays 600 points. In 120 paired simulated deals, ignoring the premium produced more clears and fewer busts.
Solitaire Cube ·
Is Solitaire Cash Legit After the $15M Settlement?
Is Solitaire Cash legit? What the $15M Barcelo v. Papaya Gaming settlement means, what it does not prove, and how same-deck matches work.
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