# Jade Grid Cascade

> Jade Grid Cascade (iPhone/iPad app by Carol Barth.)

- Source: https://appshunter.io/ios/app/jade-grid-cascade/id6794844266 (this page in markdown: same URL + `.md`)
- Developer: [Carol Barth](https://appshunter.io/developer/6794844268)
- Category: Games, Puzzle
- Price: Free
- Age rating: 17+
- Requires: iOS 18.0 · 7 MB
- Languages: American English
- Released: 2026-08-05
- Data updated: 2026-11-10

## What is Jade Grid Cascade?

Jade Grid Cascade is a logic puzzle with two constraint systems running simultaneously — which makes every correct placement feel twice as good as Sudoku.

A 6×6 grid sits on a dark canvas. Six geometric shapes float in the palette below: circle, triangle, square, pentagon, hexagon, star. Beside them: six colours — crimson, amber, jade, violet, ice, gold. The rules are split in two. Every row must contain each shape exactly once. Every column must contain each colour exactly once. And within each crystal zone — a thick-bordered 3×2 region — every shape and every colour must appear exactly once.

Because shapes and colours are constrained independently, placing one pair eliminates options along two dimensions at the same time. A jade pentagon in row three removes all other pentagons from that row and all other jade from that column and all other pentagons and jade from its zone. Three separate eliminations from a single placement. This is why cells cascade. One correct placement often determines two or three others immediately — the puzzle clicks in a way that Sudoku rarely does.

The cascade counter tracks how many empty cells are currently deducible from the constraints already in place. Watching it rise from two to five to nine after a well-chosen placement is the game's core satisfaction. Cells marked with a dashed jade ring have a unique valid pair that the current constraints determine completely. Finding these without the hint is the skill the game develops.

Four puzzle modes. Harmony uses a 4×4 grid with four shapes and four colours — no crystal zones — and teaches the two-rule logic before adding the third constraint. Crystal is the full 6×6 game. Resonance introduces overlapping zones, where a single cell belongs to two crystal regions simultaneously and a wrong placement corrupts both. Prism scales to 8×8 with a diagonal rule that adds a fourth constraint dimension.

The underlying mathematics is a Graeco-Latin square of order six: a grid where all thirty-six possible shape-colour pairs appear exactly once. Euler proved in 1782 that order-six Graeco-Latin squares were impossible. He was wrong, and the proof came in 1960. The puzzle the player is solving has a structure whose existence was controversial for nearly two centuries.

When the grid is complete, the shapes in each row briefly sort themselves by number of sides — circle first, star last — before a wave of jade light rolls across the grid and every zone emits an expanding ring of geometric light simultaneously. It is the most satisfying solve animation in any logic puzzle on the platform.

## Is Jade Grid Cascade safe?

Not enough ratings yet to assess Jade Grid Cascade.

## Is Jade Grid Cascade legit?

Jade Grid Cascade has limited verification signals. The AppsHunter Legitimacy Score for Jade Grid Cascade is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.1 — 2026-09-08

A new guide control points you to a socket the tablet's constraints have already settled, so you can find your footing without breaking the no-guessing rule. Each guide costs 40 points and still leaves the inlay for you to place. Available whenever the board has a forced socket waiting.

### 1.0 — 2026-08-05

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-10.*