capricorn-studioz, sorry I skipped past you the other day. The guess history is already in the build, it sits under the input, and it is what makes the warmer/colder chains followable (another player found a real solver bug through it, now fixed). Your point about the 3-guess Solve cost stands. One thing that came out later in this thread and changed the build: probing buys a bracket, but once the bracket is about ten wide the clues stop separating numbers, so the opening now says it is deduction and the last few guesses say they are counting (build 2199888, hard refresh to see it). If you play again I would love to know where it stops feeling fair.