Undermining (also known as Removal of the Guard) is a chess tactic in which a defensive piece is captured, leaving one of the opponent's pieces undefended or underdefended. The opponent has the unpalatable choice between recapturing or saving the underdefended piece. Many countries claim to have invented the chess game in some incipient form. ... In chess, a tactic refers to a short sequence of moves which limits the opponents options and which results in tangible gain. ...

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Kramnik-Topalov in the seventh round of the 2004 Linares chess tournament reached the diagrammed position with White to play. The black knight on a4 is defended only by the black pawn on b5. White undermined the knight with 1.Bxb5. The game continued 1... Rxb5, 2.Rxa4, with a net material gain of a pawn for White. This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... This image is originally from xboard. ... Vladimir Kramnik Vladimir Kramnik (Владимир Крамник), born June 25, 1975, is a Russian chess player. ... Veselin Topalov Veselin Topalov (born March 15, 1975) is a Bulgarian chess grandmaster. ... 2004 is a leap year starting on Thursday of the Gregorian calendar. ... The annual Linares chess tournament takes its name from the city of Linares in the Jaén province of Andalusia, Spain in which it is held. ...

See also algebraic chess notation Algebraic chess notation is the method used today by all competition chess organizations and most books, magazines, and newspapers to record and describe the play of chess games. ...

Undermining was also a technique employed during the Middle Ages to bring down castles and other fortifications. The technique was used when the forticification was not built on solid rock, and was developed as a response to stone built castles that could not be burned like older-stlye wooden forts. A tunnel would be built under the outer defenses either to provide access into the fortification or to collapse the walls. These tunnels would normally be supported by wooden supports as the digging progressed. The Middle Ages formed the middle period in a traditional schematic division of European history into three ages: the classical civilization of Antiquity, the Middle Ages, and modern times, beginning with the Renaissance. ... The Alcázar of Segovia, Spain A castle (from the Latin castellum, diminutive of castra, a military camp, in turn the plural of castrum or watchpost), is a fort, a camp and the logical development of a fortified enclosure. ... Nakhal Fort, one of the best-preserved forts in Oman. ... Stone can refer to any of the following: Stone may be used as a building material, as in this dry stone wall The Rolling Stones, the Worlds Greatest Rock and Roll Band. ... A disused railway tunnel now converted to pedestrian and bicycle use, near Houyet, Belgium A tunnel is an underground passage. ...

Related link: Castles of Britain Page about Castle Undermining.