TrigChess
Strategy chess (sin·cos·tan)
Free · Designed for iPad. Not verified for macOS.
A strategy board game where pieces hide secret angles and battle by sin·cos·tan values. Play the AI bot or challenge a friend online 1v1. Learn trigonometry by playing.
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.
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The developer, Soo Jeong Min, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
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Information
- Seller
- Soo Jeong Min
- Size
- 6.9 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English and Korean
- Age Rating
4+
- 4+
- Copyright
- © 2026 Soo Jeong Min