A blunder (poka in Japanese) is a mistake of which one feels it is way below one's level. A blunder is often a result of Go blindness, a situation in which you fail to see what is thud-simple when pointed out to you.
Here is the position after 149 moves of game 7 of the 7th Kisei title match between Cho and Fujisawa.
Cho's move 148 was at the marked white stone and Fujisawa responded at the marked black stone. In a commentary in issue 31 of Go World magazine, Cho himself called the marked black stone a silly blunder that loses the game. Instead, playing at in the following diagram was recommended, which would have led to a close game, perhaps a half-point decision.
If White plays , Black easily lives with .
The actual game proceeded as follows, with White storming through Black's position.
- How to avoid blunders
- stupid moves
- the first player to blunder
- satisfying victory discussion
- The genius of the greatest blunderer