Direct ko

A direct ko is a ko that either side can resolve in one move after ignoring the enemy's ko threat, in contrast to special types of ko such as approach ko, multi-stage ko, or double ko.

The Japanese term for direct ko, hon ko, literally means real ko.

There's usually no special reason to call a ko situation a direct ko instead of just a ko, unless the distinction is important. For instance, the final approach move in an approach ko could be described as making a situation into a direct ko or real ko.