World Rugby responded swiftly to fix the recent legal gap being used by clubs, Released an amendment that will take effect immediately.
All credit goes to Saracens for inventing a new legal loophole known as ‘crabbing, similar to caterpillar trucking which remains legal.
The “crab ruck” is an interesting variant of that strategy, where defensive players bind to the teammate in front of Ruck to effectively cross the offside line and to tackle or block box kick of scrum-half.
Here is a clear explanation of this tactic
WORLD RUGBY – ‘These actions should be discouraged.’
Today, WR issued a statement on the “crab ruck,” claiming that defensive players must be behind the attacking player who was tackled, also they did not make any notices or comments about “caterpillar ruck”.
“Recently there have been instances of rucks being extended sideways which gets the last player very close to the opposition nine when he/she is box kicking. This reduces space and the options available to players,” the statement reads.
“Adding players to your own side of the ruck, in order to advance closer to the opposition side of the ruck squeezes the space available and compromises the clearance of the ball from the ruck. These actions should be discouraged.
“If a player is fully bound and they have moved beyond the offside line then they must return to be behind the hindmost foot before being able to be involved in play, once the ball is out or is played from the ruck.”