Last updated on June 15, 2020
Beginners series. How to play backgammon.
This is another post in our Deluxe Backgammon series for beginners. In our last article we looked at Bearing off against checkers in your home board. In this post we will look at considerations for bearing off your last two checkers. This can become very important at the end of the game if the race is close and both you and your opponent are down to a handful of checkers. This can be a thrilling way to end a backgammon game, but there are factors to consider to maximise your chance of winning. This is especially the case when the doubling cube comes into play.
The table below shows the probability of getting the last two checkers off in a single roll, depending on where they are positioned. However, knowing where to position your last two checkers can mean the difference between winning or losing. Too many backgammon players don’t know on what points to leave their last two checkers to have the best chance of bearing off with a single dice roll.
For example, imagine you have two checkers left, one is on your 8-point and the other on your 6-point. It is your turn and you roll 3-4. You cannot bear-off, you can only position yourself for the next turn. Your opponent is in a similar position on the other side of the board. The game will be complete in the next couple of moves. What are your options?
There are three available moves. 8/1, leaving checkers on the 6 and 1-points. 8/5, 6-2, leaving checkers on the 5 and 2-points. Lastly, 8/4, 6/3, leaving the checkers on the 4 and 3-points. The last option, probably looks the most balanced with the checkers in the middle of the home board. Additionally, the number required from each position still totals a roll of 7 on the dice roll. Why does it matter which position is selected? If you consult the table above it becomes clear that one position stands out from the others. The 6-1 position can only bear-off in the next turn in 15 out of 36 rolls, a total of 41%. The 4-3 position can bear-off in the next turn on 17 of 36 rolls, a total of 47%. The 5-2 position can bear-off in the next turn on 19 of 36 rolls, a total of 53%.
The 5-2 position is certainly the clear winner. The 6% margin from making the correct decision would build in value over time. Many players, particularly beginners, fail to memorise these values and as a result miss out on opportunities to increase their winning percentage. It is also critical to understand and be able to recall this table when making doubling cube decisions.
If your opponent is certain to bear off on their next move, then to win you must bear-off the upcoming roll. The table can be used to determine if offering a double is a good move. Obviously, if your last checkers are on the first couple of points, a double is likely to be refused as you are almost certain to bear-off. In contrast, if the total pip count when the total count for your two checkers is eight or more your chance to get off in one roll is always less than 50%, and you should never double.
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