This Problem is not Black and White

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Normal sudoku rules apply, and digits must increase along thermos from the bulb to the end(s). Black dots join cells with a ratio of 1:2 and white dots join cells with consecutive digits. Solvers must discover whether red represents black and green white, or vice versa. Not all dots are given.

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Play the puzzle in the video by clicking the link under the video (above). Thanks to Sam Cappleman-Lynes and Sven Neumann for their work.
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Hi! We're Simon Anthony and Mark Goodliffe, two of the UK's most enthusiastic puzzle solvers. We have both represented the UK at the World Sudoku Championships and the World Puzzle Championships. We're also "cryptic crossword" aficionados. Mark is the twelve-time winner of The Times championship and Simon is the former record holder for most consecutive correct solutions to The Listener crossword. We hope we can help your puzzle solving while also introducing you to some of the world's best puzzles.

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