Logic Masters Deutschland e.V.

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This puzzle is probably the hardest one I have set so far. It has a completely logical solution path, no bifurcation is necessary. To solve this puzzle, the letter tool and colouring in the CtC app may be helpful. Click on the configuration icon in CtC app to activate the letter tool, should you choose to use it.

Thank you for Dying Flutchman for testing.

Rules:

1. Normal sudoku rules apply.

2. Blue triangles and red diamonds. Blue triangles and red diamonds represent parity values. Solver must determine which symbol is odd and which is even. A cell with a symbol has the indicated parity. Digits along a diagonal indicated with a symbol sum to a total with the indicated parity, digits may repeat along the diagonal if allowed by other rules.

3. Letters A and B. Letters A and B represent number blocks low (1234) and high (6789). Solver must determine which letter corresponds with each block. A cell with a letter in the corner must contain one of the digits from the respective block.

4. Kropki without negative constraint. Cells separated by a white dot have a difference of 1. Cells separated by a black dot are in a 1:2 ratio. Not all dots are given.

5. Palindrome. Grey lines are palindromes, which read the same forwards and backwards.

6. Renban. The purple line contains a set of consecutive digits in any order.

7. German whispers. Adjacent digits along the green line must have a difference of 5 of more.

Solve Online (CtC app) :

I hope you enjoy the puzzle. Feel free to leave comments.

Try also my other Sudoku puzzles