French pair event, played with screens.
4♣ was not alerted by West (to South)
4♣ was alerted and explained by East (to North) as 5+♣ and 5+♥
The result was down one.
NS called the director.
Director established that West forgot the agreement, and E-W played 4♣ as 5+♣- 5+♥.
He then maintained the score, arguing that north received the right explanation
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