It is about Backgammon strategy
Backgammon has an established opening theory, although it is less detailed than that of games like chess. The tree of checker positions expands quickly because of the number of possible dice rolls and the moves available on each turn. Recent computer analysis has offered more insight on opening moves, but the midgame is reached quickly. After the opening moves, backgammon players frequently rely on some established general strategies, and will combine and switch among them to adapt to changing conditions as a game unfolds.
The most direct and sometimes the most successful strategy is simply to avoid being hit, trapped, or getting into mutually blocked stand-offs. The running game describes a strategy of moving as quickly as possible around the board, and is most successful when a player is already ahead in the race.
A holding game is a strategy wherein a player keeps a point high in his opponent’s board or on his opponent’s bar point, as the game progresses. The player may gain an advantage by hitting an opponent’s blot from the held point, or by rolling large doubles that allow the player to advance both checkers and begin a running game.
The priming game involves building a wall of checkers, called a prime, ideally covering six consecutive points. This obstructs opposing checkers that are behind the blockade. The prime is usually built somewhere between the 11-point and the 2-point, and then shuffled into the home board as the game progresses.Backgammon Galore, “Backgammon FAQ”, What is a prime?. Retrieved on August 9, 2006. A blitz describes a strategy of closing the home board as quickly as possible while keeping one’s opponent on the bar. Because the opponent has difficulty re-entering from the bar or escaping, a player can quickly gain a running advantage and win the game.
A backgame is a strategy of placing two or more anchors (points with two or more checkers) in one’s opponent’s home board, while building a prime in one’s own home board. The anchors obstruct the opponent’s checkers, and create opportunities to hit them as they move toward the home board. The backgame is generally used only to salvage a game wherein a player is already significantly behind; using a backgame as an initial strategy is usually unsuccessful.
Duplication refers to the placement of checkers in such a way that advantageous dice rolls for one’s opponent are the same for a number of desirable moves. For example, a player may position all of her blots in such a way that her opponent must roll a 2 in order to hit one, reducing the probability that any blot will be hit. Diversification refers to a complementary tactic of placing one’s own checkers in such a way that more numbers are useful.