What matters most
Core relationship: Encode important differences with shape, label, pattern, or position as well as color. Provide text alternatives for visual relationships and make controls operable by keyboard with visible focus.
For accessible puzzle design beyond color alone, begin with identify essential information and finish with write equivalent feedback. The sequence keeps the starting facts, intermediate result, and final limit visible instead of relying on memory.
A step-by-step approach
Identify essential information
Separate what must be perceived from decorative styling. Capture the result before moving to add redundant encoding. A written output shows whether the next deduction follows from the evidence or quietly adds a new assumption.
Add redundant encoding
Use at least two channels for state or category differences. Compare this output with the warning about alt text gives the answer. If that failure still fits, revise the representation before using the result in another deduction.
Test interaction paths
Complete the puzzle with keyboard only and at zoomed text sizes. Use test interaction paths as a checkpoint. Name the input, the change made, and the conclusion that becomes available so another reader can reproduce the move.
Write equivalent feedback
Correctness, hints, and explanations should not depend on color or animation alone. Finish by stating what this step establishes and what it leaves undecided. That boundary prevents a valid local conclusion from being stretched beyond the question.
Check against alt text gives the answer
Questions for add redundant encoding
- Can another reader reproduce identify essential information from the stated information?
- Did you complete add redundant encoding without reversing or enlarging the claim?
- Does the result survive the failure mode alt text gives the answer?
- Which part remains uncertain after write equivalent feedback?
This check is specific to the method above. A clear answer should expose the evidence chain and the point where a different fact would produce a different conclusion.
Example under pressure
Identify essential information in the case
A matrix uses red circles, green squares, and blue triangles. Shape already reinforces color, but an accessible explanation should also describe the row rule rather than relying on the image alone.
Why write equivalent feedback matters
The case starts with identify essential information, then uses add redundant encoding to control the next inference. The conclusion is acceptable only after write equivalent feedback. Changing any fact that supports those moves can change the answer, while an unrelated detail should not.
Common wrong turns
Alt text gives the answer
Describe the puzzle state without solving its relationship. Return to identify essential information and rebuild only from information the problem actually provides.
Contrast only
High contrast does not address every visual or motor barrier. Compare the disputed move with test interaction paths; the two should use the same definitions and direction.
Separate accessible version
A neglected parallel version often diverges from the main experience. Run the practice task while deliberately watching for separate accessible version. Record the first point where the reasoning begins to drift.
Practice and review
Audit one visual puzzle with color removed and keyboard input only. Record every piece of information or action that becomes unavailable.
Continue after write equivalent feedback
Use the puzzle design hub for the broader method, then apply the idea in the puzzle playtesting guide. Keep the written reasoning so the next attempt can improve a specific step rather than simply repeat the exercise.
Compare this method with Build a Difficulty Curve for a Puzzle Collection, then continue to How to Facilitate Puzzles in a Classroom for a different reasoning task.