Opener Lab
Compare COILS
Pick a word to compare against.
How COILS performs
Played first, COILS removes about 94.4% of the possible-answer list on average and scores 5.06 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, COILS left an average of 132 possible answers standing after the first guess. Its largest group in that replay came on July 16, 2026, when the answer was BUTTE and 376 candidates survived.
First-guess odds
| Outcome | COILS |
|---|---|
| First-turn solve* | 0% |
| At least one green | 35.2% |
| Any green or yellow | 84.1% |
| Whole row gray | 15.9% |
| Worst case answers left | 376 |
*Treating every word in the possible-answer list as equally likely.