Squeeze Tesuji In Action 1
A six-stone handicap game; White (me) has just played 1, which he vaguely remembers to be tesuji, in order to strengthen his cutting stone. This move is not tesuji at all. Actually it should have been played simply at a.
Black gives atari with and then spins a "net" around White's cutting stones. Those have no option but capturing the two black stones, while Black builds a magnificent wall. Black can almost immediately exchange a for b. White may as well resign.
For the record, this is how the game went on. White got away with his zokusuji, as only too often.