Yeah, and as with Wordle, I think there is some strategy that can be employed in the first couple guesses to aggressively eliminate digits and operators. Currently I use 3 * 5 + 2 = 17 as my first guess in order to try all the prime digits, 1, and the "easier" operators. There are probably better options though...
Interesting. I like "sum of two double digit numbers = double digit number." In Wordle I usually hunt for vowels, which I guess the equivalent thing here would be hunting for operators. But somehow it feels like knocking out digits is more useful here -- I guess because of the increased chance of repetition.
9 + 4 + 7 = 20 for example is a more efficient guess than naively trying to guess each pair.
And there are even better guesses if you just use digits.