I built a free, open-source tool to improve my Chess Vision and Coordinate memory. Looking for feature ideas!

Source: Dev.to

Overview

Chess Warmup is a free, ad‑free web app that requires no sign‑up. It helps you:

• Instantly recognize the colour of any square (e.g., “e4” is white).
• Locate board coordinates faster.

The app also tracks your statistics and shows a heatmap of your weak squares after each session.

Modes

The current version includes four training modes:

1. Square Colour Identification – Guess whether a given coordinate is a light or dark square.
2. Coordinate Recall – Identify the algebraic notation of a highlighted square.
3. Random Square Drill – Quickly name the colour and coordinate of random squares.
4. Mixed Challenge – A combination of the above tasks with increasing difficulty.

Stats & Heatmap

After each session you can view:

• Total attempts, correct answers, and accuracy.
• A heatmap visualizing the squares where you make the most mistakes, helping you focus your practice.

Screenshots

Feedback & Feature Ideas

I would love to hear your feedback: What other training modes or features would help you as a beginner? Your suggestions will guide future improvements.

Try It Out

• Live site:
• Source code: