Both of you, thank you, this is exactly the feedback I wanted. Caleb-Guyer: that was a real bug. The solver only checked warmer/colder consistency and never ruled out numbers already tried, so it could point you straight back at 25. Fixed now, a tried number never comes back as a suggestion, and the first line says each clue is measured against your last guess. vibeoverflow: the bisection read is right, that is the seam the game lives on. I added a par line at the end (a careful player needs about 7) and a quiet 'you already tried that' so a repeat does not quietly waste a guess. Updated build coming. And yes, I will play Recoil Foundry and come back with first-run notes.