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Chess Problem Database Server
This article covers computer software designed to solve, or assist people in creating or solving, chess problems – puzzles in which pieces are laid out as in a game of chess, and may at times be based upon real games of chess that have been played and recorded, but whose aim is to challenge the problemist to find a solution to the posed situation, within the rules of chess, rather than to play games of chess from the beginning against an opponent. This is usually distinct from actually playing and analyzing games of chess. Many chess playing programs also have provision for solving some kinds of problem such as checkmate in a certain number of moves ( directmates), and some also have support for helpmates and selfmates. Software for chess problems can be used for creating and solving problems, including checking the soundness of a concept and position, storing it in a database, printing and publishing, and saving and exporting the problem. As such they can not only solve di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Computer Software
Software consists of computer programs that instruct the Execution (computing), execution of a computer. Software also includes design documents and specifications. The history of software is closely tied to the development of digital computers in the mid-20th century. Early programs were written in the machine language specific to the hardware. The introduction of high-level programming languages in 1958 allowed for more human-readable instructions, making software development easier and more portable across different computer architectures. Software in a programming language is run through a compiler or Interpreter (computing), interpreter to execution (computing), execute on the architecture's hardware. Over time, software has become complex, owing to developments in Computer network, networking, operating systems, and databases. Software can generally be categorized into two main types: # operating systems, which manage hardware resources and provide services for applicat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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MS-DOS
MS-DOS ( ; acronym for Microsoft Disk Operating System, also known as Microsoft DOS) is an operating system for x86-based personal computers mostly developed by Microsoft. Collectively, MS-DOS, its rebranding as IBM PC DOS, and a few operating systems attempting to be compatible with MS-DOS, are sometimes referred to as "DOS" (which is also the generic acronym for disk operating system). MS-DOS was the main operating system for IBM PC compatibles during the 1980s, from which point it was gradually superseded by operating systems offering a graphical user interface (GUI), in various generations of the graphical Microsoft Windows operating system. IBM licensed and re-released it in 1981 as PC DOS 1.0 for use in its PCs. Although MS-DOS and PC DOS were initially developed in parallel by Microsoft and IBM, the two products diverged after twelve years, in 1993, with recognizable differences in compatibility, syntax and capabilities. Beginning in 1988 with DR-DOS, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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John Niemann
John is a common English name and surname: * John (given name) * John (surname) John may also refer to: New Testament Works * Gospel of John, a title often shortened to John * First Epistle of John, often shortened to 1 John * Second Epistle of John, often shortened to 2 John * Third Epistle of John, often shortened to 3 John People * John the Baptist (died ), regarded as a prophet and the forerunner of Jesus Christ * John the Apostle (died ), one of the twelve apostles of Jesus Christ * John the Evangelist, assigned author of the Fourth Gospel, once identified with the Apostle * John of Patmos, also known as John the Divine or John the Revelator, the author of the Book of Revelation, once identified with the Apostle * John the Presbyter, a figure either identified with or distinguished from the Apostle, the Evangelist and John of Patmos Other people with the given name Religious figures * John, father of Andrew the Apostle and Saint Peter * Pope John (disambigu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Die Schwalbe
''Die Schwalbe'' ( English: "The Swallow") is the German chess composition society. It issues the bimonthly magazine ''Die Schwalbe''. Society ''Die Schwalbe'' was founded on 10 February 1924 in Essen as ''Vereinigung von Problemfreunden zur Förderung der Aufgabenkunst'' (Society of problem friends for advancement of chess composition art). There were 15 founding fathers from the Ruhr Area lead-managed by Wilhelm Maßmann. Anton Trilling was their first president. In 1972 ''Die Schwalbe'' became a member of ''Deutscher Schachbund'' (German chess union) initiated by Gerhard Wolfgang Jensch. Johannes Hinsken from Bottrop Bottrop () is a city in west-central Germany, on the Rhine–Herne Canal, in North Rhine-Westphalia. Located in the Ruhr area, Ruhr industrial area, Bottrop adjoins Essen, Oberhausen, Gladbeck, and Dorsten. The city had been a coal-mining and ... proposed the name of the society. The name traces back to a famous four-mover entitled ''Eine Schwalbe'' comp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Gerd Wilts
Gastroesophageal reflux disease (GERD) or gastro-oesophageal reflux disease (GORD) is a chronic upper gastrointestinal disease in which stomach content persistently and regularly flows up into the esophagus, resulting in symptoms and/or complications. Symptoms include dental corrosion, dysphagia, heartburn, odynophagia, regurgitation, non-cardiac chest pain, extraesophageal symptoms such as chronic cough, hoarseness, reflux-induced laryngitis, or asthma. In the long term, and when not treated, complications such as esophagitis, esophageal stricture, and Barrett's esophagus may arise. Risk factors include obesity, pregnancy, smoking, hiatal hernia, and taking certain medications. Medications that may cause or worsen the disease include benzodiazepines, calcium channel blockers, tricyclic antidepressants, NSAIDs, and certain asthma medicines. Acid reflux is due to poor closure of the lower esophageal sphincter, which is at the junction between the stomach and the esophagu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Reto Aschwanden
Reto is a masculine given name, commonly used in Switzerland only. Origin and meaning The name means "coming from / related to Rhaetia, Rhaetian Alps, Rhaetian people or Rhaeto-Romance languages". Notable people *Reto Berra Reto Berra (born 3 January 1987) is a Swiss professional ice hockey goaltender who is currently playing for HC Fribourg-Gottéron of the National League (ice hockey), National League (NL). Berra played seven seasons in Switzerland's National Leag ... - Swiss ice hockey player * Reto Capadrutt - Swiss bobsledder * Reto Götschi - Swiss bobsledder * Reto Grütter - Swiss sidecarcross passenger * Reto Salimbeni - Swiss film-maker * Reto Schenkel - Swiss sprinter * Reto Schmidiger – Swiss alpine ski racer * Reto Stiffler - businessman * Reto Suri - Swiss ice hockey player * Reto Ziegler - Swiss footballer Other uses * Reto-Moto - Danish videogame developer {{given name Swiss masculine given names Masculine given names ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Reflexmate
A reflexmate is a chess problem in which White, moving first, must force Black to deliver checkmate within a specified number of moves against their will – with the added condition that if either player can give checkmate, they must. If this condition applies only to Black, it is a semi-reflexmate. (Without this condition, the problem is just ordinary selfmate.) Example The problem illustrated is a fairly recent example, successful in the World Chess Composing Tournament despite only a single phase of play present. It is by Štefan Sovík and is a reflexmate in two moves. The is 1.Qh5 and White threatens 2.Nbxc3, after which Black is compelled by additional condition to mate by Rxc3, with triple pin of Rc4, Bd4 and Ne4. There are three thematical variations with unpinnings of three pieces, but every time Black has to mate by after selfpin of unpinned piece on c3: * 1...Qxa4 2.Rxc3 Qb5# (White move: rook unpinned by queen move selfpins) * 1...Rxc8 2.Bxc3 Rd8# (White ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Monochromatic Chess
Monochromatic chess is a chess variant with unknown origin. The initial board position and all rules are the same as in regular chess, except that pieces that begin on a black square must always stay on a black square and pieces that begin on a white square must always stay on a white square. This would mean that knights can never move, but ''The Classified Encyclopedia of Chess Variants'' says that knights make a double jump. It has been suggested that a knight be replaced with a (3,1)-leaper (camel). If knights are allowed to move (or are captured, clearing the way), castling may become possible, but only on the . Under the rules, pawns can only move by (possibly ''en passant'') or by advancing two squares for their first move. A stalemate occurs if a player's king is not in check but the player nevertheless has no legal moves under the rules of the game. Similarly, a checkmate occurs if the king is placed in check and the king has no legal moves under the rules of the ga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Java (programming Language)
Java is a High-level programming language, high-level, General-purpose programming language, general-purpose, Memory safety, memory-safe, object-oriented programming, object-oriented programming language. It is intended to let programmers ''write once, run anywhere'' (Write once, run anywhere, WORA), meaning that compiler, compiled Java code can run on all platforms that support Java without the need to recompile. Java applications are typically compiled to Java bytecode, bytecode that can run on any Java virtual machine (JVM) regardless of the underlying computer architecture. The syntax (programming languages), syntax of Java is similar to C (programming language), C and C++, but has fewer low-level programming language, low-level facilities than either of them. The Java runtime provides dynamic capabilities (such as Reflective programming, reflection and runtime code modification) that are typically not available in traditional compiled languages. Java gained popularity sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Proof Game
A proof game is a type of retrograde analysis chess problem. The solver must construct a game starting from the initial chess position, which ends with a given position (thus proving that that position is reachable) after a specified number of moves. A proof game is called a shortest proof game if no shorter solution exists. In this case the task is simply to construct a shortest possible game ending with the given position. When published, shortest proof games will normally present the solver with a diagram - which is the final position to be reached - and a caption such as "SPG in 9.0". "SPG" here is short for "shortest proof game" and the "9.0" indicates how many moves must be played to reach the position; 9.0 means the position is reached after black's ninth move, 7.5 would mean the position is reached after seven and a half moves (that is, after white's eighth move) and so on. Sometimes the caption may be more verbose, for example "Position after white's seventh move. How did ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Retrograde Analysis
In chess problems, retrograde analysis is a technique employed to determine which moves were played leading up to a given position. While this technique is rarely needed for solving ordinary chess problems, there is a whole subgenre of chess problems in which it is an important part; such problems are known as ''retros''. Retros may ask, for example, for a mate in two, but the main puzzle is in explaining the history of the position. This may be important to determine, for example, if castling is disallowed or an ''en passant'' capture is possible. Other problems may ask specific questions relating to the history of the position, such as, "Is the bishop on c1 promoted?". This is essentially a matter of logical reasoning, with high appeal for puzzle enthusiasts. Sometimes it is necessary to determine if a particular position is legal, with "legal" meaning that it could be reached by a series of legal moves, no matter how illogical. Another important branch of retrograde analysi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Windows 7
Windows 7 is a major release of the Windows NT operating system developed by Microsoft. It was Software release life cycle#Release to manufacturing (RTM), released to manufacturing on July 22, 2009, and became generally available on October 22, 2009. It is the successor to Windows Vista, released nearly three years earlier. Windows 7's Windows Server, server counterpart, Windows Server 2008 R2, was released at the same time. It sold over 630 million copies before it was succeeded by Windows 8 in October 2012. Extended support ended on January 14, 2020, over 10 years after the release of Windows 7, and the operating system ceased receiving further updates. A paid support program was available for enterprises, providing security updates for Windows 7 for up to three years since the official end of life. Windows 7 was intended to be an incremental upgrade to Windows Vista, addressing the previous OS's poor reception while maintaining hardware and software compatibility as well as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |