Logic Masters Deutschland e.V.

Title: Thunderbird
Type: Sudoku
Link: F-puzzles link to Thunderbird Sudoku
Link: CTC App link to Thunderbird Sudoku

I suggest turning off highlight conflicts to keep the sky scraper digits black.

Variants: Renban, Sky Scraper, Non-Consecutive, Consecutive pairs

0) Sudoku

• Place the digits 1 through 9 once each in every row, column, and box.

1) Renban

• Numbers along the purple Renban lines must be consecutive, but in any order, and cannot repeat. R9C9 is the intersection of two lines that form a T. One line of length 7 and another of length 9.

• 2.1) The number outside of the grid is the number of digits seen starting from that number in the row or column and continuing.
• 2.2) Larger digits obscure smaller digits.
• a) The cells represent buildings with the height equal to the digit in the cell.
• b) Larger numbers obscure smaller numbers behind them. Example 1: A 6 obscures the digits 1 2 3 4 5. Example 2: A valid Sky Scraper of 5 could be 341625798. 4 obscures the 1. 6 obscures the 2 and 5. 9 obscures the 8. 34679 are the 5 digits seen.

3) Non-Consecutive

• Orthogonally adjacent cells in the 9x9 grid cannot contain consecutive numbers.

4) White Dot

• Cells separated diagonally by a white dot ARE consecutive.