Opener Lab
Compare ISBAS
Pick a word to compare against.
How ISBAS performs
Played first, ISBAS removes about 88.0% of the possible-answer list on average and scores 3.74 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, ISBAS left an average of 287 possible answers standing after the first guess. Its largest group in that replay came on July 19, 2026, when the answer was CHURN and 543 candidates survived.
First-guess odds
| Outcome | ISBAS |
|---|---|
| First-turn solve* | 0% |
| At least one green | 12.6% |
| Any green or yellow | 77.0% |
| Whole row gray | 23.0% |
| Worst case answers left | 543 |
*Treating every word in the possible-answer list as equally likely.