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Dancing General
You should always have your General on top. Well, there are some exceptions.

You should always have your General on top. Well, there are some exceptions.

Abak, even more than backgammon, is all about hinder.

Depending on your situation, you might want to force a blot on your opponent, block his path so it can't advance, or force him to liberate a checker that could be either immobilized by his druid or blocked.

Let's see it in this example.

A fairly typical scenario is where you are about to enter all your checkers, but your route home is partly blocked. In this case, you might fail to move all your valid moves, which could produce a blot.
A special checker to keep in mind in this situation is the General. Because the General can go backward, it might be obliged to do so in not fluid scenarios (those with limited moves) when that movement completes the maximum valid actions for the roll.
In this example, White is about to enter all its checkers into his home board, but the Guard on 15 won't have it easy. It is White's turn, and rolls 5 and 1. What do you think is the best move here?
Let's analyze two possible moves:
Initial
A Moving the Guard.
Guard
15 ↗ 14
14 ↗ 9
B Burying the General.
General
6 ↗ 1
Soldier
2 ↗ 1

A Moving the Guard.

After this move, there are two very noticeable circumstances: The Druid could trap the Guard with 33% chance, and the opponent's Guard could hit the player's Guard with 41% chance. The probability of occurrence of any two of these is almost 64%—the most likely outcome.
A
Trap.
Hit.
Both.
If this happens, White will have to crush its home. In this process, the General will be loose and most probably will have to go backward, producing a blot. Even more, the General has only so many shots to get buried, and the conditions to do so will be less likely as other soldiers occupy the last points.
A board where the General
can not be buried any more.
A board where the General
can not be buried any more.
A board where the General
can not be buried any more.

B Buring the General.

In this case, the roll is a perfect opportunity to bury the General at once and minimize the possibility of producing a blot in the future. But not only that, it provides the Guard a better opportunity for survival, given that the chance of being trapped by the druid is 16.7%, and the possibility of being hit is 19.4%, with a global probability occurrence of 27.8%. Risky.
B
Trap.
Hit.
Both.
If this unlikely event happens, White is almost safe because:
  • A Guard is a small asset to have trapped.
  • The likelihood of leaving a blot in the next roll is very small (12%)
As a comparation, the only aspect this move is not better than A, is that if the guard gets trapped, it will be further from home.

In conclusion

Although a player should usually keep his General on top of every other checker to take advantage of his capabilities, there are some cases when you want to bury it, so you will avoid having it dancing loose and out of your control.

Samy Garib.

Abak Evolution Backgammon is an awesome class-based Backgammon variant, that literally adds a new dimension to the classical board game.