Opener Lab
Compare FLACK
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How FLACK performs
Played first, FLACK removes about 87.4% of the possible-answer list on average and scores 4.20 bits of information. Its first-turn information ranks #10,036 out of 14,855 Wordle guesses tested. Roughly 30% of the time at least one letter lands in the right spot.
Tried against 1,858 past Wordle answers, FLACK left an average of 292 possible answers standing after the first guess. Its largest group in that replay came on July 20, 2026, when the answer was DIVER and 712 candidates survived.
First-guess odds
| Outcome | FLACK |
|---|---|
| First-turn solve* | 0.04% |
| At least one green | 29.5% |
| Any green or yellow | 69.8% |
| Whole row gray | 30.2% |
| Worst case answers left | 712 |
*Treating every word in the possible-answer list as equally likely.