The Ing Cup (应氏杯世界围棋锦标赛) is a major international tournament sponsor by Ing Chang-Ki family through their charitable vehicle the Ing Chang‐Ki Wei‐Chi Education Foundation. It is held every 4 years coinciding with the Olympics.
The 1st Ing Cup was a 16-player knockout tournament. This was increased to 24 in beginning the 2nd term, with 8 players seeded into round 2 directly. It was expanded again in the 8th term to accommodate 30 players in total (including 2 seats each generously allocated to EU and North American players). The semifinals are best-of-3 and the final is best-of-5.
- Before 1988, the only major international Go exchanges were those bilateral competitions between Japan and China. Ing Chang-Ki designed Ing Cup to be the first truly international tournament. However after he publicly announced his intention, Japan quickly put together the Fujitsu Cup to be the first.
- Due to a dispute of terms and conditions, China officially withdrew from the 2nd Ing Cup. However, a few oversea Chinese players participated and everyone represented their home cities.
- In early years, due to a special accounting method for sekis, the official results can have fractions (for example: ).