Ko’s are a great thing. They can reverse the whole game if you mess up one and stronger players love to use them in handicap games. I had the great pleasure of encountering one of these Ko’s in my last game. The situation was such as in the picture above. White has just taken the Ko at H3 and Black responded by playing at S8, a huge threat… or not?
In the actual game White filled the Ko and Black killed the T9-group. Now the situations becomes rather delicate for White as he seems short of liberties. Notice, that if the marked White group dies, his group in the center dies too (amounting to a loss of more than 100 points). So does White have a way to live?
In the game White decided to continue by playing Hane to which Black of course responded by Atari and White connected. The situation is rather tricky now. Is White dead? Seki? What is the status of the White group?