Game artwork from the official Steam store; rights belong to the respective publisher.
Base game (Steam) · PC
DE · EUR · Steam
Price observed in the DE store. A Steam account is required. Check the store for package contents, operating-system support and regional purchase restrictions.
Caïssa Board – A Modern Chess GUI
The Evolution of a Modern Chess GUI
Graphical user interfaces (GUIs) for chess first appeared in the 1990s. While chess engines became vastly stronger over the decades, the GUIs themselves remained largely unchanged.
Caïssa Board was created to rethink how a chess interface presents information:
1. Visual Tactics First: It started with a core idea: make tactics visible. Instead of forcing players to read raw engine numbers, Caïssa Board outlines forks, pins, and hanging pieces directly on the board.
2. Variants & Lichess: Expanded to support 13+ chess variants in both 2D and 3D, along with native Lichess integration for playing online.
3. Database Engine: A dedicated database system was added, enabling fast 20-move position searches and custom Lua scripting.
4. Modding System: A built-in Mod Manager and GitHub toolkit were introduced to help players create custom piece sets, boards, and maps.
Official store excerpt · Description source ↗
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Base game
No other base game is required.
Activation: Steam
A Steam account is required.
Supported platforms: Windows
Official DE Steam product record; other regions are checked separately.
Checked:
Supports: Steam appdetails type=game identifies this standalone base-game app, Product name and explicitly listed operating systems
DE / EUR · Steam · This exact edition and purchase conditions only.
One recorded observation. Not enough data to show a price trend.
EUR 15.60 lowest in the displayed observations, from Oct 20, 2026, 09:40 PM UTC to Oct 20, 2026, 09:40 PM UTC.
| Observed at (UTC) | Price |
|---|---|
| Oct 20, 2026, 09:40 PM UTC | EUR 15.60 |