Logic Masters Deutschland e.V.

Links:

• CTC Web App
• F-Puzzles

Standard Rules:

• Normal Sudoku rules apply.
• Normal Little Killer rules apply. Digits along diagonals pointed to by arrows outside the grid must sum to the indicated total.

• For a digit A in column Z, look to the digit in the Ath Column.
• For this digit B in the Ath column, look to the digit in the Bth column.
• For this digit C in the Bth column, look to the digit in the Cth column...
• Repeat this process until you are back to the digit A (i.e. - eventually you will get to column Y which contains Z as its digit, and this points back to the Zth column where you started with the digit A).

• In addition to standard little killer rules, the sum of the order of the horizontal cycles of the cells along the diagonal of a little killer clue also adds to the number of the clue. (e.g. The digits of R1C8 and R2C9 sum to 8. Furthermore, the order of R1C8's cycle plus the order of R2C9's cycle sums to 8)
• Shaded cells have a digit equal to its horizontal cycle's order. (e.g. if a shaded cell's digit was 3, that cell would be part of an order 3 horizontal cycle). No negative constraint applies.

Cycle Examples:

Shaded cells below all have a horizontal cycle with order equal to their digit. I've illustrated the path the cycle takes, as well as numbered the order of the path assuming the 'start' of the cycle is the shaded cell (note that the 'start' of a cycle is completely arbitrary, and has no impact on the cycle's order)

In the second example, you can see a valid cycle killer clue. Both digits along the little killer clue are part of order-2 cycles, and 2+2 = 1+3 = 4.