A teenager plunged an eight-inch blade into a woman's arm after arguing with his girlfriend.
The 16-year-old, who cannot be named because of his age, launched the unprovoked attack on his partner's 20-year-old friend at Hylton Castle Park.
She was left with a four centimetre-deep stab wound to her arm which needed five stitches.
The te
enager later told police he had drunk more than two litres of cider before the incident on November 1, which he could not remember.
Magistrates at Sunderland Youth Court heard that a group of youngsters had been drinking at the teenager's home in Hylton Castle, Sunderland, which he shared with his mother and girlfriend.
After an argument his girlfriend and her friend left, shortly followed by the teenager.
At the park he put his arm around the older girl, as if to cuddle her.
She felt what she thought was a hard punch to her arm, until her attacker's partner showed her the black-handled kitchen knife.
In a statement read out to the court, she said: "I was scared at time as he was off his face with the drink.
"I was lucky just to get stabbed in the arm because he was just swinging for me."
Prosecutor Helen Wareham told the court the youth was a persistent young offender with a previous convictions for possession of a bladed article and assault.
Bill Scanlon, defending, said reports by Youth Offending showed the defendant to be a polite and pleasant young man who had acted out of character.
The teenager admitted having a drink problem, and while on bail had been staying with his father, who was limiting his drink supply.
He pleaded guilty to wounding.
Mr Scanlon described him as "immature and emotionally vulnerable", saying: "It is an isolated incident and he does not pose a risk of serious harm to the public in the future."
He added that the 16-year-old was at college studying motor mechanics and had a part-time job.
Magistrates imposed an 18-month supervision order with an intensive supervision and surveillance programme.
He was electronically tagged and given a six-month daily curfew from 7pm to 7am, ordered to pay £300 compensation to the victim and £60 court costs.
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