Bill Robertie's Blog

Bill Robertie welcomes the opportunity to share his knowledge of backgammon with experienced players and beginners alike.

On his blog, Robertie publishes set and equipment reviews, creates quiz contests and provides free lessons. He would be remiss not to include his Robertie’s Rules! He also educates readers of the Gammon Press blog on the history of the game, offers backgammon instruction and more.

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Hit or Not?

Nov 2, 2016 | Backgammon Problems: Early Game

Many backgammon problems boil down to a simple question: hit, or don’t hit. In essence, backgammon is a pretty simple game. In general, you want to make points, and in general, you want to hit.

When you can hit a checker on the other side of the board, gaining both time and racing equity, you almost always want to do so. (The only exceptions occur when the alternative is to make a very strong priming or blocking point on your side.) But when the only possible hit is to hit a blot in your inner board, the choice is more difficult. Now you’re risking a significant loss of race equity if you get hit back, so the hit is rarely automatic. For a hit in your inner board to be correct, one of these two reasons usually applies:

Which point to make?

Oct 6, 2016 | Backgammon Problems: Early Game

Although the first roll of the game is pretty well understood, backgammon gets much more complicated as we get a little deeper into the game and positions get more complex. Both positions in this article occur at the third move, after Black wins the opening roll and White responds. Try your hand at these commonplace and apparently simple situations, and see how you do.

Position 1.

White – Pips 161

Black – Pips 162
Black to Play 4-3

Make a point or hit?

Aug 31, 2016 | Backgammon Problems: Early Game

White – Pips 150

Black – Pips 161
Black to Play 3-1(a) Black to play 3-1.

(b) Black to play 3-2.

Holding Game Doubles, Part 2

Jul 11, 2016 | Backgammon Problems: Holding Game

In some earlier posts we talked about doubling in high anchor games, and looked at some typical positions where White held an anchor on the 5-point and Black was trying to cash in on his racing advantage and bring his last checkers home to victory. All of those positions turned out to be takes.

From those examples, you might conclude that almost any 5-point game was a take, regardless of the race. But it’s not quite that simple. In this article we’ll look at some examples where small modifications to the position can produce big changes in the evaluation.

A Short History of Modern Backgammon

Mar 30, 2016 | Backgammon Generally

If you’re new to backgammon, you might wonder how the game took on the form it has, with many books and websites available and tournaments all over the world. In this post I’ll give you a short history of the growth and development of backgammon since 1920, when the game began to take on its modern form. Enjoy!

Position or Race?

Mar 17, 2016 | Learning Backgammon

In this position, with Black on roll, who is a favorite?

White – Pips 161

Black – Pips 140
Black on roll. Who’s a favorite? read more…

Holding Game Doubles

Feb 8, 2016 | Backgammon Problems: Holding Game

Last article, we talked about some of the tricky play problems that arise in high anchor positions. This time, we’ll start to look at doubling strategy in these common situations. (Remember, a high anchor game is one where one player has escaped all his back checkers, while his opponent has managed to secure an anchor on the 4-point or 5-point.)

High Anchor Holding Games

Feb 4, 2016 | Backgammon Problems: Holding Game

Next to races, the most common type of position in backgammon is what we call the holding game. Holding games occur when one side escapes his back checkers to the safety of the midpoint or beyond, but the other side (the “defender”) does not. Instead, the defender manages to anchor his two back checkers somewhere in his opponent’s home board.

More on Duplication

Dec 7, 2015 | Backgammon Problems: Middle Game

In my last post, I introduced the concept of duplication. It’s a powerful idea, one of the crucial tactical ideas in backgammon. Look for your opponent’s numbers that already play well, and remember that plays which expose blots to those very same numbers elsewhere on the board become stronger than they at first appear. Here’s another good example.

Duplication

Nov 4, 2015 | Backgammon Problems: Holding Game

Duplication is a cute tactical idea which can lead you to make the right play in a wide variety of situations. The basic idea is pretty simple. You find yourself in a vulnerable position. You roll an awkward number. No matter what move you make, your opponent will have some bad things he can do to you next turn. You want to minimize the number of his rolls that can hurt you. What do you do?

The answer? Duplication! Try to play your number in such a way that your opponent needs the same number to accomplish his goals everywhere on the board, rather than different numbers in different places. In this way, you reduce his effective numbers to a minimum, giving yourself the best possible chance to survive.

Volunteering a Shot

Oct 14, 2015 | Backgammon Problems: Holding Game

Backgammon is basically a race, and losing ground in a race is usually a bad idea, to be avoided if at all possible. Safe, constructive plays are generally good. Constructive plays which leave a few indirect shots aren’t bad, and are often necessary to make progress.

But sometimes there aren’t any safe plays, or even moderately risky plays, that make progress. What if the safe plays all hurt your position in some way? Then you may start looking at plays that leave a direct shot. These plays may be costly if your opponent hits, but they may improve your position if your opponent misses (which he’s generally favored to do.)

Split or Slot?

Aug 31, 2015 | Backgammon Problems: Middle Game

Slotting to make a key point and splitting your back checkers are two tactical ideas that dominate early-game play when more obvious choices like hitting blots and making points aren’t available. The 1970s and 1980s were the heyday of slotting. The preferred method of winning a game was to build an imposing prime (often by slotting points, then covering) and follow it with a crushing double. The older method, taking the points you were given and looking for a chance to escape your back checkers, was seen as antiquated and wimpy, a game plan only suited for geezers playing in the park.

Using Benchmark Positions

Aug 1, 2015 | Backgammon Problems: Blitzes

A key idea in understanding the proper use of the doubling cube on a practical level is that of the “benchmark” position. A benchmark cube situation is a position where one of the decisions (doubling or taking) is a toss-up, while the other is completely clear. Properly understanding a benchmark position is very useful since it unlocks the key to many related positions. Just compare your actual position to the benchmark, spot what the relevant differences, and you should be able to make a good cube decision over the board.