Technically that is incorrect, but knowledgeable people know what is meant. The point of the AB algorithm is that it gets the same answer as the minimax algorithm would as if it had evaluated all positions, and so as a short cut we just say that all the positions were analyzed. It also makes it sound like you don't understand the AB algorithm or the minimax algorithm. Arguing that the engine does not "evaluate" those positions that were cut-off, makes it sound as if the engine might have missed something. The intended meaning was that the AB engine gets the same evaluation *as if* it had evaluated all positions to some depth.
The intent was one of those short cuts as discussed in the paragraph above. The argument is silly and misleading because the people are talking past each other. There is a post in stackexchange where people were arguing about whether an AB engine was evaluating *all* positions for some depth.
Technically, such a draw would have to be by agreement, or by the 3 fold repetition of position rule. Almost everyone knows what that means even though technically there is no such drawing rule in the rules of chess. A simple example from chess is an annotation in a game that says "draw by perpetual check". That does not mean they do not know what is going on, and that technically they are incorrect. People often use short cuts when speaking/writing to quickly get their point across without being pedantic. Misunderstandings about "depth" and "positions evaluated" by AB engines such as Stockfish. Sometimes this produces good results and other times it says silly things such as "exchanges material". It has a graphic way of showing how tactical a position is.įritz also comes with a special engine, that runs along side the engine of choice, which can be turned on to display a native language positional evaluation of a position. The program will give a hint, a suggestion, show an immediate threat, and show the move it is expecting the opponent to play. There are other dynamic features in Fritz. I find this very confusing because there are too many arrows. The feature "Show Plans" depicts with arrows the best line for both sides. Some of these comments are silly (Gives a check), others are wrong (5.Qe2 only loses material if White exchanges). Coloured arrows and squares on the board (to illustrate the point) may appear.įor example in the Colle System at White's 5th move we see comments like:ĥ.Be2 Bad development - piece moves again If you click any of the moves, the principal variation that would follow displays at the top of the screen, along with the resulting evaluation. The program will periodically recompile the list, searching one move deeper in the process.įor each move there is a short characterisation. This will opens a new window with a list of all legal moves in the current position, sorted according to their value. The feature "Explain All Moves" does the following: (from the doc) Colored arrows are used to show two moves by the computer. The feature "Spy" shows using colored arrows what the engine is planning to do tactically. This could be another way to do the A/D network. Usually it is okay to remove a defending piece. * Green means the piece has enemy contact but is well defended. You must be careful about removing any defending piece. * Yellow means that the piece is under attack, but it is just sufficiently defended. This is usually a pretty serious danger signal and means you must take active measures to avoid losing a piece. * A red square means that the pieces is under attack and not sufficiently defended, or that it is being attacked by a piece of lesser value. The feature "Threatened squares" displays a colored background on a pieces as follows: (from the docs) The feature "Opening Hints" displays arrows based on the opening book chosen. A thick red line indicates a win of material. Green arrows are used for defense and red arrows for attack. Once it is checked, during a move, lines are drawn indicating attack/defense. The feature "Dynamic Hints" is interesting it is almost the idea I have for the A/D network. Under Training -> Hints, there are 6 check boxes that can turn on these features. Let's consider Fritz-12's abilities in this. Chess programs also have a variety of features that occur dynamically.
#UBERSTRIKE HACKS FULL#
So far I've been discussing full game analysis.
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