Logic Masters Deutschland e.V.

This is my second 4D puzzle (4D Arrow Sudoku). I am planning on making one for each major variant type, killer sudoku will be next.

This puzzle links two different sudoku grids so that if a cell is >=6 in one grid, it will also be >=6 in the other grid.

For example, if R2C4 was a 7 in the first grid, we would know R2C4 must be a 6,7,8 or 9 in the other grid. If R5C8 in the second grid was a 5, we would know R5C8 in the first grid must be a 1,2,3,4 or 5.

Basically, it is a high/low coloring puzzle where when you deduce the color in one grid, you can also color the other grid in the same location.

Normal sudoku rules apply.

Numbers on a thermometer must strictly increase as they move away from the bulb.

Cells with grey circles must contain odd numbers.

If a cell contains a number >=6 in one grid, the corresponding cell in the other grid must also contain a number >= 6.

Solve the puzzle at penpa.