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QUESTION

I was taking a look at the tactical motifs on chess tempo and I was curious to know which motifs are encountered most often and which motifs are encountered the least? Are their statistics for this?

{ asked by xaisoft }

ANSWER

I'm going to suppose that compiling this sort of data would be nearly impossible because the question is, while it seems very specific, is actually far too broad. As a database developer I face these kinds of scenarios very often. One of my special favorites is just the idea of a date and time. It seems so simple but the second you start to really look at it you see it is in fact very deep and has many facets.

Let's start breaking this apart. 1. We assume you mean in Grand Master level games only. 2. Do you consider only tactical motifs that actually occur in the game or do you consider positions that are directly threatened? These positions would actually be highly important for study because even though they do not occur in the actual game, both players needed to consider them. 3. If you consider positions that do not actually occur over the board, how deep in the analysis do you go? 4. Do you consider tactical motifs that are standard operations like a simple pin or do you only consider tactical motifs used in a combination? 5. Do you consider tactical motifs that occur in any combination or only those that actually work? 6. If you only consider those in combinations that work, what do you mean by "work"?

You see where I am going with this. There are so many things that need to be considered before the data can actually be transformed into something informative that it becomes impractical. This should not really be surprising for a topic that chess players through the centuries have had a difficult time defining: what is a tactic? What is a combination? Is a combination just a set of forcing moves even if it leaves the position exactly equal? What if it leaves the player who initiated it weaker? It's like the US supreme court justice said. We might not be able to define it, but we "know it when we see it." But that sort of definition doesn't help us transform a mass of data into actual information.

{ answered by Robert Kaucher }
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