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Exciting Announcement

Posted By: Timothy Chow
Date: Sunday, 29 August 2010, at 6:18 p.m.

In Response To: Exciting Announcement (phil simborg)

Phil Simborg wrote:

But I think the reason it has this term is that if the opponent had a checker on the 5 and 1 you would have hit twice, and end up with your checkers slotted on the 5 and 1 just as you should if he didn't have those blots. The "phantom" is the checker that is missing from the bar that would have been on the 5 point.

Ah, O.K. I had thought that the idea behind the term was as follows: Suppose the opponent already has a checker on the bar. Then you hit a second checker with 6/2*. What do you do with the 3? Well, if the checker that was already on the bar were on the 5 point, then you would not hesitate to hit it with 8/5*. Just because the checker is already on the bar, that shouldn't stop you from playing 8/5, because the resulting position is strong. The play 8/5 does not hit, but the net effect is as if you hit twice—hence "phantom double hit."

See also Marty Storer's explanation of the term.

It seems strange to me to use the term "double hit" (phantom or otherwise) when only one checker ends up on the bar, but I guess it can be used by extension.

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