Suggestion: add pencil (gray text) feature to differentiate between answers the solver is certain of and answers that might be wrong. Ideally the solver would be able to both type in new answers in pencil and change an existing answer to pencil without having to retype it.
Suggestion: add pencil (gray text) feature to differentiate between answers the solver is certain of and answers that might be wrong. Ideally the solver would be able to both type in new answers in pencil and change an existing answer to pencil without having to retype it.