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→Types of problems: {{Citation needed}} for claim about e.p. capture right (and in general for all claims !!!) |
→Features: {{fact}} : doubt about "most puzzles are composed" -- IMO no more true today Tag: Reverted |
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Not every chess problem has every one of these features, but most have several:
* The position is ''composed'' – that is, it has not been taken from an actual game, but has been invented for the specific purpose of providing a problem. Although a constraint on orthodox chess problems is that the original position be reachable via a series of legal moves from the starting position, most problem positions would not arise in over-the-board play.{{fact|Today > 90% of published chess puzzles are so on online chess sites, and very many of them are taken from actual games -- often (semi-)automatically chosen by software.}}
* There is a specific ''stipulation'', that is, a goal to be achieved; for example, to checkmate Black within a specified number of moves.
* There is a ''theme'' (or combination of themes) that the problem has been composed to illustrate: chess problems typically instantiate particular ideas.
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