A double ko and two separate kos can also form a quadruple ko.
- Fifteen examples of pro games ending in quadruple ko are given on Quadruple Ko.
- In the 2005 Southern Great Wall Cup, a quadruple ko occurred in the match of Chang Hao versus Lee Changho and the game ended in no result. SGF
- In the preliminaries for the 25th Kisei, the game on April 6th 2000 between Doi Makoto and Hasegawa Sunao ended in no result due to a quadruple ko that occurred relatively early in the game. The game was replayed, with Hasegawa winning. SGF.
- An amateur game from the 2003 Frankfurt Go Tournament (Simon Kober 16 kyu versus Bjoern Wenzlaff 18 kyu) also included a quadruple ko. A photo is on the cover of DGoZ 3/2003.