Example
For example, in chess, assume a situation where black only searches the game tree to six plies, and from the current position, it determines that the queen is lost in the sixth ply. Also, suppose there is a move in the search depth where the computer may sacrifice a rook, and the loss of the queen is pushed to the eighth ply. This is, of course, a worse move than sacrificing the queen, because it leads to losing a queen as well as a rook. Because the loss of the queen was pushed over the horizon of search, it is not discovered and evaluated by the search. Sacrificing of the rook seems to be better than losing the queen, so the sacrificing move is returned as the best option. Thus delaying moves, in this case the delaying move is the sacrifice of the queen has weakened the position in the game. Similarly there is a loss of rook, which is purely additional. The loss of additional material or unnecessary weakening of the position in the game is the result of the phenomena called Horizon Effect.
Read more about this topic: Horizon Effect
Famous quotes containing the word example:
“Our intellect is not the most subtle, the most powerful, the most appropriate, instrument for revealing the truth. It is life that, little by little, example by example, permits us to see that what is most important to our heart, or to our mind, is learned not by reasoning but through other agencies. Then it is that the intellect, observing their superiority, abdicates its control to them upon reasoned grounds and agrees to become their collaborator and lackey.”
—Marcel Proust (1871–1922)