Puzzle#84: Parity skyscraper sudoku by Guest author Kumaresan on April 26, 2019 guestAuthor Parity skyscraper variants +
Puzzle#83: Odd Fortress Hybrid sudoku by Guest Author Kumaresan on April 21, 2019 hybrid oddFortress variants +
Hybrid Sudoku-Thermo Arrow By Guest Author Kumaresan on April 17, 2019 guestAuthor hybrid thermoArrow +