Opener Lab
Compare TIROS
Pick a word to compare against.
How TIROS performs
Played first, TIROS removes about 95.4% of the possible-answer list on average and scores 5.27 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, TIROS left an average of 109 possible answers standing after the first guess. Its largest group in that replay came on July 17, 2026, when the answer was LEGAL and 312 candidates survived.
First-guess odds
| Outcome | TIROS |
|---|---|
| First-turn solve* | 0% |
| At least one green | 26.6% |
| Any green or yellow | 86.8% |
| Whole row gray | 13.2% |
| Worst case answers left | 312 |
*Treating every word in the possible-answer list as equally likely.