# TrigChess — Strategy chess (sin·cos·tan)

> Strategy chess (sin·cos·tan) (iPhone/iPad app by Soo Jeong Min.)

- Source: https://appshunter.io/ios/app/trigchess/id6777909385 (this page in markdown: same URL + `.md`)
- Developer: [Soo Jeong Min](https://appshunter.io/developer/6775654534)
- Category: Education, Entertainment
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English, Korean
- Released: 2026-06-08
- Data updated: 2026-08-16
- User reviews in markdown: https://appshunter.io/ios/app/trigchess/id6777909385/reviews.md

## What is TrigChess?

TrigChess is a 2-player strategy board game built around trigonometry (sin, cos, tan).

On a 7×7 board, each team places 7 pieces (0, 1, 2, 3) and secretly assigns every piece an angle from −85° to 85° (multiples of 5, summing to 0). When two pieces meet, the function and sign on the boundary between them decide the winner, and the winner absorbs the loser's angle. Capture the opponent's 0-piece — or every piece except their 0 — to win.


## Version history (last 1 release)

### 1.0 — 2026-06-09

No release notes.

## More apps by Soo Jeong Min

- [Vibrant Field Guide](https://appshunter.io/ios/app/vibrant-field-guide/id6775654322)
- [식물카드](https://appshunter.io/ios/app/id6776550230)
- [Matrix Operation Game](https://appshunter.io/ios/app/matrix-operation-game/id6777995764)
- [Exp Function Game](https://appshunter.io/ios/app/exp-function-game/id6778243664)
- [곤충카드](https://appshunter.io/ios/app/id6778243679)

All apps by Soo Jeong Min: https://appshunter.io/developer/6775654534

---

*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 2026-08-16.*