Opener Lab
Compare PISOS
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How PISOS performs
Played first, PISOS removes about 87.8% of the possible-answer list on average and scores 3.99 bits of information. Its first-turn information ranks #11,581 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, PISOS left an average of 295 possible answers standing after the first guess. Its largest group in that replay came on July 19, 2026, when the answer was CHURN and 644 candidates survived.
First-guess odds
| Outcome | PISOS |
|---|---|
| First-turn solve* | 0% |
| At least one green | 23.0% |
| Any green or yellow | 72.7% |
| Whole row gray | 27.3% |
| Worst case answers left | 644 |
*Treating every word in the possible-answer list as equally likely.