Chess Problem Types Of Problem Beauty In Chess Problems

Exactly what constitutes a chess problem is, to a degree, open to debate. However, the kinds of things published in the problem section of chess magazines, in specialist chess problem magazines, and in collections of chess problems in book form, tend to have certain common characteristics:

Problems can be contrasted with tactical puzzles often found in chess columns or magazines in which the task is to find the best move or sequence of moves (usually leading to mate or gain of material) from a given position. Such puzzles are often taken from actual games, or at least have positions which look they could have arisen during a game, and are used for instructional purposes; problems, on the other hand, are invented positions, often with very "artificial" looking positions and solutions, not likely to arise in a game, and are appreciated more for their aesthetic than their instructional qualities.

1 Types of problem

All the above may also be found in forms of fairy chess - chess played with unorthodox rules, possibly using fairy pieces (unorthodox pieces).

In addition, there is the study, in which the stipulation is that white to play must win or draw. Almost all studies are endgame positions. Because the study is composed it is related to the problem, but because the stipulation is open-ended (the win or draw does not have to be achieved within any particular number of moves) it is usually thought of as separate from the problem. However, particularly long more-movers sometimes have the character of a study - there is no clear dividing line between the two.

In all the above types of problem, castling is assumed to be allowed unless it can be proved by retrograde analysis (see below) that the rook in question or king must have previously moved. En passant captures, on the other hand, are assumed not to be allowed, unless it can be proved that the pawn in question must have moved two squares on the previous move.

There are several other types of chess problem which do not follow the usual chess pattern of two sides playing moves towards checkmate. Some of these, like the knight's tour are essentially one-offs, but other types have been revisited many times, with magazines, books and prizes being dedicated to them:

2 Beauty in chess problems

There are no official standards by which to distinguish a beautiful problem from a poor one, and judgement varies from individual to individual as well as from generation to generation, but modern taste generally recognizes the following elements as being important if a problem is to be regarded as beautiful:

The problem position must be legal. That is to say, the diagram must be reachable via a legal chess game which begins from the standard opening position. It is not considered a defect if the diagram can only be reached via a game containing gross blunders. Chess problems, on the whole, are not created for the purpose of practical chess training.
The first move of the problem's solution (the key move or key) must be unique. A problem which has two keys is said to be cooked, and would not be published in any magazine. An exception is problems which intentionally have more than one solution, which compliment or contrast each other in some way - this type of problem is particularly common in helpmates.
Some would say that, ideally, there should only be one possible white move after every black move, although this is not nearly so important. A choice of white moves other than the first move is a dual. Duals are often excusable if the problem is strong in other regards.
The solution should be explicable in terms of a theme or themes, rather than emerging from disjointed calculation. Many of the more common themes have been given names by problemists (see chess problem terminology for a list).
The key move of the solution should be unobvious. Obvious moves such as checks, captures, and (in directmates) moves which restrict the movement of the black king, make for bad keys. Keys which deprive the black king of some squares it could move to (flight squares) but at the same time surrender an equal or greater number of flights are acceptable. Key moves which prevent the enemy from playing a checking move are also undesirable, particularly in cases where there is no mate provided after the checking move.
Every piece on the board should serve a purpose, either to enable the actual solution, or to exclude alternative solutions. Extra units should not be added to create "red herrings" (this is called dressing the board), except in rare cases where this is part of the theme. If the theme can be shown with fewer total units, it should be.
The problem should exhibit economy of moves. If the theme can be shown in fewer moves, it should be.

3 Example problem

To the right is a problem composed by T. Taverner in 1881. It is a directmate, with white to move and mate in 2.

The key move is Rh1. This is difficult to find because it makes no threat -- instead, it puts black in zugzwang, a situation where every move is worse than no move, yet the player has to move anyway. Each of black's nineteen legal replies allows an immediate mate. For example, if black defends with 1...Bxh7, the d5 square is no longer guarded, and white mates with 2.Nd5#. Or if black plays 1...Re5, he blocks that escape square for his king allowing 2.Qg4#. Yet if black could pass (i.e. make no move at all) white would have no way to mate on his second move.

The thematic approach to solving is then to notice that in the original position, black is already almost in zugzwang. If black were compelled to play first, only Re3 and Bg5 would not allow immediate mate. However, each of those two moves blocks a critical escape square for the black king (a flight square), and once white has removed his rook from h2 he can put some other piece on that square to deliver mate: 1...Re3 2. Bh2# and 1...Bg5 2.Qh2#.

The arrangement of the black rooks and bishops, with a pair of adjacent rooks flanked by a pair of bishops, is known to problemists as Organ Pipes . This arrangement means the black pieces get in the way of each other: for example, consider what happens after the key if black plays 1...Bf7. White now mates with 2.Qf5#, a move which is only possible because the bishop black moved has got in the way of the rook's guard of f5 - this is known as a self-interference. Similarly, if black tries 1...Rf7, this interferes with the bishop's guard of d5, meaning white can mate with Nd5#. Mutual interferences like this, between two pieces on one square, are known as Grimshaw interferences. There are several Grimshaw interferences in this problem.

4 Further reading

Andrei Frolkin and Gerd Wilts , Shortest Proof Games (1991) - a collection of 170 proof games (published in Germany, but in English)
Michael Lipton , R. C. O. Matthews and John Rice , Chess Problems: Introduction to an Art (Faber, 1963)
Jeremy Morse , Chess Problems: Tasks and Records (Faber and Faber, 1995, revised edition 2001) - concentrates on maximum tasks and records

John Nunn, Solving in Style (1985) - problems seen from the point of view of the solver
John Rice , Chess Wizardry: The New ABC of Chess Problems (Batsford, 1996) - a general overview of chess problems, including an extensive A-Z of themes and terms, and 460 problems. Widely regarded as the best single-volume work in English on the subject.

5 External links

Bruno's Chess Problem of the Day (in English and French)
The British Chess Problem Society
Problemesis - an online chess problem magazine (in English and French)
Chess composition books in public domain

See also: Collection of chess problemsThese are chess problems illustrating chess strategy and tactics. The goal is to find the "best" move for each position. Answers can be found by clicking on the image. tactical chess problems See: chess chess openings chess strategy chess tactics.

Chess problems

<Hide>

Home > Chess problem