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GP3: Thermo Sudoku (No. 9)

I have two solutions for this one and can not find an error. In R3C79, R8C27, and R9C29 numbers 4 and 5 are interchangeable?

Greetings, Danielle

Hi Danielle,

There must be a mistake somewhere, as the solution contains 5 and 6 in cells R3C79 (4 is in R3C6). Hard to help you without seeing your partial solution.
You can now download the pdf file of solutions if you want to check:


Hi Fred,

thanks for the solution file, with it I could finally find my error. I will solve it again (third try ;-) ).

Greetings, Danielle