Opener Lab
Compare SHACK
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How SHACK performs
Played first, SHACK removes about 88.6% of the possible-answer list on average and scores 4.38 bits of information. Roughly 34% of the time at least one letter lands in the right spot.
Tried against 1,859 past Wordle answers, SHACK left an average of 266 possible answers standing after the first guess. Its largest group in that replay came on July 20, 2026, when the answer was DIVER and 655 candidates survived.
First-guess odds
| Outcome | SHACK |
|---|---|
| First-turn solve* | 0.04% |
| At least one green | 34.1% |
| Any green or yellow | 72.2% |
| Whole row gray | 27.8% |
| Worst case answers left | 655 |
*Treating every word in the possible-answer list as equally likely.