Opener Lab
Compare HACEK
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How HACEK performs
Played first, HACEK removes about 92.4% of the possible-answer list on average and scores 4.61 bits of information. Its first-turn information ranks #6,037 out of 14,855 Wordle guesses tested. It is not on the possible-answer list, but it can still be useful because of the feedback groups it creates.
Tried against 1,858 past Wordle answers, HACEK left an average of 176 possible answers standing after the first guess. Its largest group in that replay came on July 13, 2026, when the answer was STOUT and 410 candidates survived.
First-guess odds
| Outcome | HACEK |
|---|---|
| First-turn solve* | 0% |
| At least one green | 32.5% |
| Any green or yellow | 82.6% |
| Whole row gray | 17.4% |
| Worst case answers left | 410 |
*Treating every word in the possible-answer list as equally likely.