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  III - Historical background   Drawing one's attention to the \"classic\" Hedgehog (dia-  gram D1), although there are known at least two typical ga-  mes played in the 1960s (Korchnoi-Kholmov 0-1, Moscow  1964 and Hort-Tal 0-1, Havana 1966), it was in the mid  1970s that in fact the Hedgehog came into style by the hands of the great masters Lubomir Ljubojevic that showed it to D1 Ulf Andersson which in turn defeated Anatoly Karpov who learned the lesson and from that time popularized it. II - Hedgehog positions The Hedgehog structure in diagram D2 originates from a  Catalan or from a Queen's Indian, and the one from diagram  D3 originates from a Sicilian Defense. tric Variation of the English opening, and being able also to emerge from the Maroczy Variation of the Sicilian Defense. In this fashion, the greater the number of armored unitsthat advance, the greater number become exposed to the cut In diagram D1 the Hedgehog originates from the Symme-in their line of communications and thus the counterattack. There are still other variations including Hedgehog as white. D1), but also can find itself as in diagrams D2 and D3.

In itscommunication between the enemy spearhead from the bo- classic structure there are white pawns on c4-e4 (diagramdy of its infantry in the rear.   Used as an anti-armored defensive tactic the Hedgehog allows a deep armored advance, a blitzkrieg spearhead, chan- neling their advance to the interior of this strong position.Due to the speed of this advance, these armored units D3separate from the infantry in the rear and at this moment theHedgehog formation positions its own armored units in that The Hedgehog is characterized by the black pawns on theempty space and with this effectively cutting the lines of 6th rank (a6-b6-d6-e6) and the half-open c-column. Curitiba Chess Club - Cycle of Chess Lectures - March 19, 2008HEDGEHOG - A CLASSIC AND OPERATIONAL STUDY - PART 1 Henrique Marinho Translated from Portuguese by Randyl Kent Plampin (Sunnyvale, CA, USA) Classic Study   I - Origins in the military art   The Hedgehog of military practice is a heavily defensive position, however, with a certain mobility in waiting the opportunity for the counterattack.