In each grid, place the digits 1-6 in cells such that each row/column/region contains all digits once each. Each grid contains six 'sum cells', one per row/column/region. The value of a sum cell equals the cell's digit plus the digit in the same position in the other grid. No digit can appear in more than one sum cell in the same grid. Sum cells may be in the same position in the two grids. Along a red line, the cells' values form a non-repeating set of consecutive numbers in any order. Along a blue line, the sum of cell values is the same in each region the line passes through. White dots connect cells with consecutive values. Not all dots are necessarily given.