Opener Lab
Compare REFIS
Pick a word to compare against.
How REFIS performs
Played first, REFIS removes about 94.3% of the possible-answer list on average and scores 4.84 bits of information. It is not on the possible-answer list, but it can still be useful because of the feedback groups it creates.
Tried against 1,859 past Wordle answers, REFIS left an average of 137 possible answers standing after the first guess. Its largest group in that replay came on July 18, 2026, when the answer was BOOTH and 321 candidates survived.
First-guess odds
| Outcome | REFIS |
|---|---|
| First-turn solve* | 0% |
| At least one green | 21.2% |
| Any green or yellow | 86.4% |
| Whole row gray | 13.6% |
| Worst case answers left | 321 |
*Treating every word in the possible-answer list as equally likely.