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Welcome to my blog of interesting backgammon positions.

 

These will be posted more or less daily and also tweeted. As I add a new position I will give a  commentary for the previous one.

 

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Readers are invited to send in their own positions for possible inclusion in Position of the Day to Chris.

By Chris Bray, Dec 2 2019 03:03PM

XGID=-BBBaDB-----B-----adc-bbbA:1:1:1:42:5:4:0:7:10


Match Play. Red leads 5-4 to 7. How should Red play 42?


Kill or be killed? That is the question. Bar/21, 5/3 is the passive play but bar/21, 6/4* is the right play.


It swaps 22% gammon losses for 13% extra wins so despite the score and the fact that a gammon for White wins him the match it is still the right play. The passive play is an error but not a blunder.






By Chris Bray, Nov 29 2019 04:25PM

Over the next few days the website will be undergoing a technology refresh and may not always be available so just try later if at first you don't succeed.


Chris

By Chris Bray, Nov 29 2019 04:24PM

XGID=---C-BDbAa---B--acbdb---BA:0:0:1:22:5:4:0:13:10


Match Play. Red leads 5-4 to 13. How should Red play 22?


Quite simply, if Red does not hit he must pass White’s double. After a passive play such as bar/23,24/22(2), 8/6 he is behind in race, threat and position and being behind in all three elements normally always indicates a pass.


After bar/23, 13/9*, the other 2 can be played 24/22 or 23/21. There is virtually no equity difference between the two plays. When in doubt, hit. That might just bring Red’s three-point home board into play.




By Chris Bray, Nov 28 2019 05:35PM

XGID=a---BBBBBB--b-b--cAcbb-AA-:0:0:1:00:0:0:3:0:10


Money Play. Should Red double? If doubled, should White take?

Over the board most would double and I would expect a fair few drops.


However, Red has five rolls that crack his 6-pt prime immediately and White can still build a prime against Red’s rear checkers. Technically this no double/take (actually nearly a blunder to double) but against all but the best I would try to steal a point in this position. Human beings err while XG does not!





By Chris Bray, Nov 27 2019 03:04PM

XGID=--BBB-CbB-B--B------acbdc-:1:-1:1:21:5:5:0:7:10


Match Play. Double Match Point. How should Red play 21?


At DMP killing checkers is a crime to be avoided.


Over the board Red played 6/3 but that is a blunder. White’s board is irreparably broken and Red must maximise contact and hitting potential. The correct play is 8/5, starting the point that Red really wants to make.




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