Puzzle#84: Parity skyscraper sudoku by Guest author Kumaresan on April 26, 2019 guestAuthor Parity skyscraper variants +
Hybrid Sudoku-Thermo Arrow By Guest Author Kumaresan on April 17, 2019 guestAuthor hybrid thermoArrow +
Odd-Even Pairs Sudoku by Guest Author Kumaresan on March 31, 2019 guestAuthor odd even pair variants +
Coded Pairs Sudoku for WSC: By Guest Author Kumaresan on November 04, 2018 coded pairs guestAuthor variants wsc +
Differential Around Sudoku for WSC: By Guest Author Kumaresan on November 04, 2018 Differential Around guestAuthor variants +