An action mentioned in the
Chalk Farm rules of 1984 (Appendix 2A, note 7) but rarely used, as it requires the
Thraping Coefficient and the
line velocity of the Circle Line to be exactly 3π apart. This has only occured twice in tournament play, both times being played by
Mrs Trellis in
All-In games. The
Thraper must have silver
? tokens on Embankment and Baker Street, and then
huff a player towards the Circle Line. The non-parity between the player and line LVs cause all tokens on the Circle Line to move three stations anticlockwise. When the opportunity is spotted, this can severely hamper attempts to change lines in zones 1 and 2.
[MJC]
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