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Mastermind Candidate Code Filter

Online mastermind candidate code filter. Does not enumerate a complete alphabet automatically; only the supplied candidate list is filtered.

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Three steps. That’s it.

A useful toolkit for text, data, images and calculations.

01
Add your input
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02
Make it yours
Adjust the options and run the action.
03
Take the result
Copy the result or download its file.

mastermind candidate code filter online

Use mastermind candidate code filter online for Puzzle input — follow the example. Does not enumerate a complete alphabet automatically; only the supplied candidate list is filtered. Bounded local puzzle processing. Search limits and supported input formats are described for each tool.

How to use it

Select Try example and follow its grid, word-list or JSON shape. Change the options if needed, select Run tool, then copy or download the JSON result.

Options and example settings

Option	Choices / value	Example default
Puzzle input — follow the example	Use the grid, word list or JSON shape in the worked example.	{ "candidates": [ "1122", "1212", "1221", "2211" ], "hints": [ { "guess": "1111", "exact": 2, "misplaced": 0 }, { "guess": "1122", "exact": 4, "misplaced": 0 } ] }

Calculation method

Retain candidate codes whose exact/misplaced feedback matches every supplied hint.

Worked examples

Apply mastermind candidate code filter to the case below, keeping the displayed units and assumptions. Does not enumerate a complete alphabet automatically; only the supplied candidate list is filtered.

Mastermind Candidate Code Filter — worked case

Settings: No additional options

Input:

{
  "candidates": [
    "1122",
    "1212",
    "1221",
    "2211"
  ],
  "hints": [
    {
      "guess": "1111",
      "exact": 2,
      "misplaced": 0
    },
    {
      "guess": "1122",
      "exact": 4,
      "misplaced": 0
    }
  ]
}

Calculated result for these inputs:

Output:

{
  "candidates": [
    "1122"
  ]
}

Choose the right tool

Choose a checker to validate a supplied grid and a solver to search for answers. Generators use reproducible seeds. Read uniqueness, unplaced-word and truncation flags before treating an output as complete.

Limitations and common mistakes

Does not enumerate a complete alphabet automatically; only the supplied candidate list is filtered. Bounded local puzzle processing. Search limits and supported input formats are described for each tool.
Use the exact symbols, row sizes and JSON keys shown in the worked example. Check any limit or incomplete-result flags.

Frequently asked questions

How can I use mastermind candidate code filter online?

Select Try example and follow its grid, word-list or JSON shape. Change the options if needed, select Run tool, then copy or download the JSON result.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.