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Interference (chess)
In the game of chess, interference occurs when the line between an attacked piece and its defender is interrupted by sacrificially interposing a piece. It is a chess tactic which seldom arises, and is therefore often overlooked. Opportunities for interference are rare because the defended object must be more valuable than the sacrificed piece, and the interposition must itself present a threat. Huczek defines interference as a tactic involving blocking moves that obstruct lines of attack. This definition may be expanded by including blocking moves that disrupt lines of defense. Examples In diagram A, White to play will apparently be obliged to retreat the knight from f5, because the squares to which it could advance are all guarded. The interference move 1.Nd6+, however, interrupts the black rook's defense of the black queen. If Black plays either 1...cxd6 or 1...Bxd6, White will capture Black's queen. Therefore, Black has no better play than 1...Rxd6 2.exd6 Qxe2 3.Rxe2 Bxd6, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackmar–Diemer Gambit
The Blackmar–Diemer Gambit (or BDG) is a chess opening characterized by the moves: :1. d4 d5 :2. e4 dxe4 :3. Nc3 where White intends to follow up with f2–f3, usually on the fourth move. White obtains a tempo and a half-open f-file in return for a pawn, and as with most gambits, White aims to achieve rapid and active posting of their pieces in order to rapidly build up an attack at the cost of the gambit pawn. It is one of the few gambits available to White after 1.d4. History The Blackmar–Diemer Gambit arose as a development of the earlier Blackmar Gambit, named after Armand Blackmar, a relatively little-known New Orleans player of the late 19th century who popularized its characteristic moves (1.d4 d5 2.e4 dxe4 3.f3) and was the first player to publish analysis of the opening. The popularity of the original Blackmar Gambit, however, was short-lived, as it was basically unsound, allowing Black to secure a superior position after White's immediate 3.f3 with 3...e5!. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chess Problem Terminology
This glossary of chess problems explains commonly used terms in chess problems, in alphabetical order. For a list of unorthodox pieces used in chess problems, see Fairy chess piece; for a list of terms used in chess is general, see Glossary of chess; for a list of chess-related games, see List of chess variants This is a list of chess variants. Many thousands of variants exist. The 2007 catalogue ''The Encyclopedia of Chess Variants'' estimates that there are well over 2,000, and many more were considered too trivial for inclusion in the catalogue. .... A B C D E F G H I K L M N O P R S T U V W Z Notes R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holzhausen Interference
Holzhausen may refer to: Places ;Germany * Holzhausen, Münsing, a locality in the municipality of Münsing, Bavaria * Holzhausen am Ammersee, part of Utting on the Ammersee, Bavaria * Holzhausen über Aar, a village in Hessen * Holzhausen (Stralsund), a student village in Stralsund, Mecklenburg-Vorpommern * Holzhausen (Porta Westfalica), a village in the Porta Westfalica municipality, North Rhine-Westphalia * Holzhausen, Bad Laasphe, a village in the Siegen-Wittgenstein district, North Rhine-Westphalia * Holzhausen an der Haide, a municipality in the Rhein-Lahn district, Rhineland-Palatinate * Holzhausen, Saxony-Anhalt, a municipality in the district of Stendal, Saxony-Anhalt * Holzhausen, Amt Wachsenburg, part of Amt Wachsenburg, Thüringen ;Austria * Holzhausen, Austria, a municipality in Upper Austria, Austria ;Poland *Holzhausen is the former German name of the village Nabyszyce in Ostrów Wielkopolski County, Greater Poland Voivodeship, in west-central Poland People wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siegbert Tarrasch
Siegbert Tarrasch (; 5 March 1862 – 17 February 1934) was a German chess player, considered to have been among the strongest players and most influential theoreticians of the late 19th and early 20th century. Life Tarrasch was born in Breslau, in what was then Prussian Silesia and now is Poland. Having finished school in 1880, he left Breslau to study medicine in Berlin and then in Halle. With his family, he settled in Nuremberg, Bavaria, and later in Munich, setting up a successful medical practice. He had five children. Tarrasch was Jewish, converted to Christianity in 1909, and was a patriotic German who lost a son in World War I, yet he faced antisemitism in the early stages of the Third Reich. Chess career A medical doctor by profession, Tarrasch may have been the best player in the world in the early 1890s. He scored heavily against the ageing World Champion Wilhelm Steinitz in tournaments (+3−0=1) but refused an opportunity to challenge Steinitz for the world titl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plachutta
The Plachutta is a device found in chess problems wherein a piece is sacrificially positioned in blockade to deny coverage of multiple distant squares required by the opposition. For example, two of an opponent's bishops, queen, or rooks are defending locations through an intersection square, and an enemy unit moved into that square blocks disrupts coverage in such a way that, even if captured, the previous defensive situation cannot be restored. The Plachutta is named after Joseph Plachutta (1827–1883), and related to a number of other problem themes: it can be regarded as a Würzburg–Plachutta brought about by a sacrifice on the critical square (a Würzburg-Plachutta itself being a pair of Holzhausen interferences); or it can be thought of as a Novotny with similarly moving (rather than differently moving) black pieces involved (a Novotny itself being a Grimshaw brought about by a white sacrifice on the critical square). It can also be compared to the anti-Bristol, in w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grimshaw (chess)
A Grimshaw is a device found in chess problems in which two pieces arriving on a particular square mutually interfere with each other. It is named after the 19th-century problem composer Walter Grimshaw. The Grimshaw is one of the most common devices found in directmates. Examples with description The theme can be understood by reference to the displayed example by A. G. Corrias (published in ''Good Companion'', 1917). A. G. Corrias example The problem is a mate in two (White must move first and checkmate Black in two moves against any defense). The key is 1.Qb1, which threatens 2.Qb7#. Black has three ways to defend against this. * One is to play 1...c3, giving his king a new flight square at c4, but this unguards d3, allowing White to mate with 2.Qd3#. It is the other two black defenses, however, which show the Grimshaw theme. * Black can play 1...Bb2, thus cutting off the white queen's path to b7. However, the bishop on b2 interferes with the a2 rook and stops it moving a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Novotny (chess)
The Novotny (also often spelled as Nowotny, even in non-German sources) is a device found in chess problems named after a problem from 1854 by Antonín Novotný, though the first example was composed by Henry Turton in 1851. A piece is sacrificed on a square where it could be taken by two different opposing pieces, but whichever makes the capture, it interferes with the other. It is essentially a Grimshaw brought about by a sacrifice on the critical square. This pattern can arise as part of a combination in an actual game, but it is extremely rare (see games below). Most chess players would not use the term "Novotny" to describe such a move, since that term is almost exclusively used in the context of chess problems. Examples Basic The device can be understood by reference to the problem shown here, a mate in two moves (white moves first, and must checkmate black in two moves against any defence). The key (first move of the solution; see Glossary of chess problems) is 1.Nb2 (s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chess
Chess is a board game for two players, called White and Black, each controlling an army of chess pieces in their color, with the objective to checkmate the opponent's king. It is sometimes called international chess or Western chess to distinguish it from related games, such as xiangqi (Chinese chess) and shogi (Japanese chess). The recorded history of chess goes back at least to the emergence of a similar game, chaturanga, in seventh-century India. The rules of chess as we know them today emerged in Europe at the end of the 15th century, with standardization and universal acceptance by the end of the 19th century. Today, chess is one of the world's most popular games, played by millions of people worldwide. Chess is an abstract strategy game that involves no hidden information and no use of dice or cards. It is played on a chessboard with 64 squares arranged in an eight-by-eight grid. At the start, each player controls sixteen pieces: one king, one queen, two rooks, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chess Problem
A chess problem, also called a chess composition, is a puzzle set by the composer using chess pieces on a chess board, which presents the solver with a particular task. For instance, a position may be given with the instruction that White is to move first, and checkmate Black in two moves against any possible defence. A chess problem fundamentally differs from over-the-board play in that the latter involves a struggle between black and white, whereas the former involves a competition between the composer and the solver. Most positions which occur in a chess problem are 'unrealistic' in the sense that they are very unlikely to occur in over-the-board play. There is a good deal of specialized jargon used in connection with chess problems; see glossary of chess problems for a list. Definition The term "chess problem" is not sharply defined: there is no clear demarcation between chess compositions on the one hand and puzzles or tactical exercises on the other. In practice, however ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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