Tigran Petrosian's Immortal Chess Game vs Spassky - Hijacking diagonals! Queen Sac! - Brilliancy!

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Instructive game tags: Petrosian vs Spassky, Moscow, Reti Opening, Provocative play, Encouraging opponent to attack, Kings Indian set up by black, Fianchetto variation of Kings Indian defence, Black plays for Na5 c5 and queenside expansion, Spassky closes center for later f5, playing on both sides of board, weaknesses created as part of an attack, weakness provocation, hijacking diagonals, weakening dark squares, getting rid of fianchettoed bishop, allowing aggressive pawn moves, exchange sacrifice for light square control, weak light squares, losing defensive pieces, colour complex defenders, bishop on e6, double exchange sac, queen and bishop complementing each other, vacuum of weaknesses,, centralised pieces, mass centralisation, wonderful combination, queen sac, queen sacrifice, beautiful Qh8 check, beautiful final combination

Instructive game: Hijacking diagonals!

Who is Tigran Petrosian ?

Tigran Vartanovich Petrosian (Russian: Тигра́н Варта́нович Петрося́н; Armenian: Տիգրան Պետրոսյան; June 17, 1929 – August 13, 1984) was an Armenian-Soviet Grandmaster, and World Chess Champion from 1963 to 1969. He was nicknamed "Iron Tigran" due to his almost impenetrable defensive playing style, which emphasised safety above all else.[1][2]

Petrosian was a Candidate for the World Chess Championship on eight occasions (1953, 1956, 1959, 1962, 1971, 1974, 1977 and 1980).

He won the World Championship in 1963 (against Mikhail Botvinnik), successfully defended it in 1966 (against Boris Spassky), and lost it to Spassky in 1969. He won the Soviet Championship four times (1959, 1961, 1969, and 1975).

Petrosian is widely known for popularizing chess in Armenia.[3][4]

Playing style
This section uses algebraic notation to describe chess moves.
Petrosian was a conservative, cautious, and highly defensive chess player who was strongly influenced by Aron Nimzowitsch's idea of prophylaxis. He made more effort to prevent his opponent's offensive capabilities than he did to make use of his own. He very rarely went on the offensive unless he felt his position was completely secure.[5] He usually won by playing consistently until his aggressive opponent made a mistake, securing the win by capitalizing upon this mistake without revealing any weaknesses of his own. This style of play often led to draws, especially against other players who preferred to counterattack. Nonetheless, his patience and mastery of defence made him extremely difficult to beat. He was undefeated at the 1952 and 1955 Interzonals, and in 1962 he did not lose a single tournament game. Petrosian's consistent ability to avoid defeat earned him the nickname "Iron Tigran".[26] He was considered to be the hardest player to beat in the history of chess by the authors of a 2004 book.[27]

Petrosian preferred to play closed openings that did not commit his pieces to any particular plan. As black, Petrosian enjoyed playing the Sicilian Defence, Najdorf Variation[28] and the French Defence. As white, he often played the English Opening.[29] Petrosian would often move the same piece multiple times in a few moves, confusing his opponents in the opening and threatening draws by threefold repetition in the endgame. In a game against Mark Taimanov during the 1955 USSR Chess Championship, Petrosian moved the same rook 6 times in a 24-move game, with 4 of those moves occurring on consecutive turns.[30][31] He had a strong affinity for knights rather than bishops, a characteristic that is attributed to the influence of Aron Nimzowitsch.[32]
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Who is Spassky ?

Boris Vasilievich Spassky (Russian: Бори́с Васи́льевич Спа́сский; born January 30, 1937) is a Russian chess grandmaster. He was the tenth World Chess Champion, holding the title from 1969 to 1972. Spassky played three world championship matches: he lost to Tigran Petrosian in 1966; defeated Petrosian in 1969 to become world champion; then lost to Bobby Fischer in a famous match in 1972.

Spassky won the Soviet Chess Championship twice outright (1961, 1973), and twice lost in playoffs (1956, 1963), after tying for first place during the event proper. He was a World Chess Championship candidate on seven occasions (1956, 1965, 1968, 1974, 1977, 1980, and 1985). In addition to his candidates wins in 1965 and 1968, he reached the semi-final stage in 1974 and the final stage in 1977.
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