Opener Lab
Compare SPERM
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How SPERM performs
Played first, SPERM removes about 92.9% of the possible-answer list on average and scores 4.77 bits of information. Its first-turn information ranks #4,493 out of 14,855 Wordle guesses tested. Roughly 27% of the time at least one letter lands in the right spot.
Tried against 1,858 past Wordle answers, SPERM left an average of 170 possible answers standing after the first guess. Its largest group in that replay came on July 18, 2026, when the answer was BOOTH and 415 candidates survived.
First-guess odds
| Outcome | SPERM |
|---|---|
| First-turn solve* | 0.04% |
| At least one green | 27.1% |
| Any green or yellow | 82.4% |
| Whole row gray | 17.6% |
| Worst case answers left | 415 |
*Treating every word in the possible-answer list as equally likely.