Opener Lab
Compare INDEX
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How INDEX performs
Played first, INDEX removes about 89.0% of the possible-answer list on average and scores 4.06 bits of information. Roughly 20% of the time at least one letter lands in the right spot.
Tried against 1,859 past Wordle answers, INDEX left an average of 258 possible answers standing after the first guess. Its largest group in that replay came on July 18, 2026, when the answer was BOOTH and 557 candidates survived. It has been the daily answer once.
First-guess odds
| Outcome | INDEX |
|---|---|
| First-turn solve* | 0.04% |
| At least one green | 19.9% |
| Any green or yellow | 76.4% |
| Whole row gray | 23.6% |
| Worst case answers left | 557 |
*Treating every word in the possible-answer list as equally likely.