Forum Archive : Match Play

Gammonless takepoint formula From:   Adam Stocks Address:   adam@stocks49.freeserve.co.uk Date:   19 June 2002 Subject:   Re: Seeking match equity tips Forum:   rec.games.backgammon Google:   aeqaoa$2mr$1@newsg3.svr.pol.co.uk Once you have learned the match equity table, I would recommend this little formula to keep in your head, which calculates the gammonless (racing) takepoint at a given score: racing takepoint = (Pass - TL) / (TW - TL) where Pass = match equity if you pass, TW = match equity if you take and win single game TL = match equity if you take and lose single game e.g. for trailing -4,-3 (using the Woolsey match equity table), racing takepoint = (32 - 17) / (60 -17) = 15/43 = approx 35% This is higher than the normal money takepoint of 25% (dead cube), so if you think it is a borderline money take, you can drop at a -4,-3 score with confidence. This will save you from learning a whole heap of individual takepoints, as you can work them out over the board very easily. However, as Doug said, simple formulas like this don't allow for cube ownership after a take, so you need to make an adjustment for that (usually by subtracting a few percentage points off the takepoint). Having said all that, I agree with Hank that it isn't worth spending undue effort learning reams of table entries, at the expense of studying other aspects of the game which probably have a more immediate impact on your overall playing strength. Numbers are an added bonus, but most of the game hinges on getting a feel for different classes of positions, and making rough adjustments from positions and scores for which you know a reasonably accurate value. Adam   Did you find the information in this article useful?           Do you have any comments you'd like to add?

 

Match Play

1-away/1-away: advice from Bernhard Kaiser  (Darse Billings, July 1995) 

1-away/1-away: advice from Stick  (Stick+, Mar 2007) 

1-away/1-away: and similar scores  (Lou Poppler, Aug 1995) 

2-away/3-away: playing for gammon  (Tom Keith, Feb 1996) 

2-away/4-away: Neil's rule of 80  (Neil Kazaross, June 2004) 

2-away/4-away: cube strategy  (Tom Keith, Dec 1996) 

2-away/4-away: practical issues  (Mark Damish, Jan 1996) 

2-away/4-away: trailer's initial double  (Kit Woolsey, Jan 1996) 

3-away/4-away: opponent's recube  (William C. Bitting+, Feb 1997) 

3-away/4-away: racing cube  (Bill Calton+, Nov 2012) 

3-away/4-away: tricky cube decision  (Kit Woolsey+, July 1994) 

3-away/4-away: what's the correct equity?  (Tom Keith, Sept 1997) 

4-away/4-away: take/drop point  (Gary Wong, Oct 1997) 

5-away/11-away: redouble to 8  (Gavin Anderson, Oct 1998) 

7-away/11-away: volatile recube decision  (Kit Woolsey, May 1997) 

Both too good and not good enough to double  (Paul Epstein+, Sept 2007) 

Comparing 2-away/3-away and 2-away/4-away  (Douglas Zare, Mar 2002) 

Crawford rule  (Chuck Bower, May 1998) 

Crawford rule  (Kit Woolsey, Mar 1997) 

Crawford rule--Why just one game?  (Walter Trice, Jan 2000) 

Crawford rule--history  (Michael Strato, Jan 2001) 

Delayed mandatory double  (tem_sat+, Oct 2010) 

Delayed mandatory double  (Donald Kahn+, Dec 1997) 

Doubling when facing a gammon loss  (Kit Woolsey, Jan 1999) 

Doubling when opponent is 2-away  (David Montgomery, Dec 1997) 

Doubling when you're an underdog  (Stein Kulseth, Dec 1997) 

Doubling window with gammons  (Jason Lee+, Jan 2009) 

Free drop  (Ian Shaw, May 1999) 

Free drop  (Willis Elias+, Oct 1994) 

Gammonless takepoint formula  (Adam Stocks, June 2002) 

Going for gammon when opp has free drop  (Kit Woolsey, Jan 1998) 

Going for gammon when opp has free drop  (Kit Woolsey, Apr 1995) 

Holland rule  (Neil Kazaross, Apr 2010) 

Holland rule  (Kit Woolsey, Dec 1994) 

Leading 2-away with good gammon chances  (Douglas Zare, Feb 2004) 

Match play 101  (Max Urban+, Oct 2009) 

Matches to a set number of games  (Tom Keith+, Oct 1998) 

Playing when opponent has free drop  (Gilles Baudrillard+, Dec 1996) 

Post-crawford doubling  (Scott Steiner+, Feb 2004) 

Post-crawford doubling  (Maik Stiebler+, Dec 2002) 

Post-crawford doubling  (Gus+, Sept 2002) 

Post-crawford mistakes  (Rob Adams, Sept 2007) 

Post-crawford/2-away: too good to double  (Robert-Jan Veldhuizen, July 2004) 

Slotting when opponent has free drop  (onur alan+, Apr 2013) 

Take points  (fiore+, Feb 2005) 

Tips to improve cube handling  (Lucky Jim+, Jan 2010) 

When to free drop  (Dan Pelton+, Oct 2006) 

When to free drop  (Tom Keith+, July 2005) 

When to free drop  (Gregg Cattanach, Dec 2004) 

When to free drop  (Kit Woolsey, Feb 1998) 

When to free drop  (Chuck Bower, Jan 1998) 

Which format most favors the favorite?  (Daniel Murphy+, Jan 2006) 

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