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🔰 The Elo rating system
🔹 Elo is best known for his system of rating chess players. The original chess rating system was developed in 1950 by Kenneth Harkness, the Business Manager of the United States Chess Federation. By 1960, using the data developed through the Harkness Rating System, Elo developed his own formula which had a sound statistical basis and constituted an improvement on the Harkness System. The new rating system was approved and passed at a meeting of the United States Chess Federation in St. Louis in 1960.
🔹In 1970, FIDE, the World Chess Federation, agreed to adopt the Elo Rating System. From then on until the mid-1980s, Elo himself made the rating calculations. At the time, the computational task was relatively easy because fewer than 2000 players were rated by FIDE.
🔹FIDE reassigned the task of managing and computing the ratings to others, excluding Elo. FIDE also added new "Qualification for Rating" rules to its handbook awarding arbitrary ratings (typically in the 2200 range, which is the low end for a chess master) for players who scored at least 50 percent in the games played at selected events, such as named Chess Olympiads.[4][5] Elo and others[who?] objected to these new rules as arbitrary and politically driven.
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@unitychess
🔰 The Elo rating system
🔹 Elo is best known for his system of rating chess players. The original chess rating system was developed in 1950 by Kenneth Harkness, the Business Manager of the United States Chess Federation. By 1960, using the data developed through the Harkness Rating System, Elo developed his own formula which had a sound statistical basis and constituted an improvement on the Harkness System. The new rating system was approved and passed at a meeting of the United States Chess Federation in St. Louis in 1960.
🔹In 1970, FIDE, the World Chess Federation, agreed to adopt the Elo Rating System. From then on until the mid-1980s, Elo himself made the rating calculations. At the time, the computational task was relatively easy because fewer than 2000 players were rated by FIDE.
🔹FIDE reassigned the task of managing and computing the ratings to others, excluding Elo. FIDE also added new "Qualification for Rating" rules to its handbook awarding arbitrary ratings (typically in the 2200 range, which is the low end for a chess master) for players who scored at least 50 percent in the games played at selected events, such as named Chess Olympiads.[4][5] Elo and others[who?] objected to these new rules as arbitrary and politically driven.
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@unitychess
Bobby Fischer in the Marshall Club playing by telex in the Capablanca Memorial held in Havana in 1965.
Source: Chess Life, Sep 1965, page 191, taken from "Vindication for Bobby Fischer.
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Source: Chess Life, Sep 1965, page 191, taken from "Vindication for Bobby Fischer.
@UnityChess
Moscow, 5th December 1976. In the 6th round of the 44th USSR Championship, World Champion Anatoly Karpov faces Belorussian master Viktor Kupreichik.
@UnityChess
@UnityChess
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☑️ USSR Championship (1976), Moscow
⚪️ Anatoly Karpov
⚫️ Viktor Kupreichik
Spanish Game: Bird Variation (C61)
Result : 1-0
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⚪️ Anatoly Karpov
⚫️ Viktor Kupreichik
Spanish Game: Bird Variation (C61)
Result : 1-0
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Leonid Stein (USSR 'A') in play v. Eduard Gufeld (USSR 'B') in the National Tournament of 3 Teams in Moscow, April 24th, 1973.
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This was Stein's last tournament - his sudden death at the age of 38 a few months later shocked the chess world.
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@UnityChess
♦️ Today is birthday of Vasilios Kotronias
Greek chess grandmaster and chess author
🌺 🌹🌷🌸💐☘️🌹 Happy birthday Vasilios 👏👏👏👏
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@unitychess
Greek chess grandmaster and chess author
🌺 🌹🌷🌸💐☘️🌹 Happy birthday Vasilios 👏👏👏👏
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@unitychess
🛄 #Kotronias_chess_Quotes_001
🔹 Vasilios Kotronias
🔹Greek chess grandmaster and chess author
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@unitychess
🔹 Vasilios Kotronias
🔹Greek chess grandmaster and chess author
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@unitychess
🛄 #about_Kotronias
🔹 Vasilios Kotronias
🔹Greek chess grandmaster and chess author
🔰 Vasilios Kotronias is a Greek chess grandmaster and chess author. He is ten-time Greek Chess Champion. Kotronias was awarded the titles of International Master in 1986 and Grandmaster in 1990.
🔘Country: Greece
🔻Cyprus (1998–2004)
🔘Born: 25 August 1964 (age 54)
🔻Athens, Greece
🔘Title: Grandmaster (1990)
🔘FIDE rating: 2505 (August 2018)
🔘Peak rating: 2628 (January 2008)
🔰 Vasilios Kotronias was born in Athens. Since then he has been one of Greece's leading representatives at Olympiads and other international events.
His tournament achievements include joint first places at Panormo 1998 and Gibraltar 2003. He has participated in three of FIDE's World Championship knockout tournaments, but has never made it further than the second round. Kotronias is an eight time Greek champion.
🔰Between 1998 and 2004, he represented Cyprus, but has since switched federations to become a Greek national player once again.
He was a candidate for the European Parliament with The River, in the elections of 25 May 2014.
♦️ A memorable game by Vasilios Kotronias👇
🔸Vasilios Kotronias vs Francisco Vallejo Pons
🔸10th European Individual Championship (2009), Budva MNE, rd 5, Mar-10
🔸Caro-Kann Defense: Classical Variation. Main lines (B18)
♦️Review and download PGN file👇
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@unitychess
🔹 Vasilios Kotronias
🔹Greek chess grandmaster and chess author
🔰 Vasilios Kotronias is a Greek chess grandmaster and chess author. He is ten-time Greek Chess Champion. Kotronias was awarded the titles of International Master in 1986 and Grandmaster in 1990.
🔘Country: Greece
🔻Cyprus (1998–2004)
🔘Born: 25 August 1964 (age 54)
🔻Athens, Greece
🔘Title: Grandmaster (1990)
🔘FIDE rating: 2505 (August 2018)
🔘Peak rating: 2628 (January 2008)
🔰 Vasilios Kotronias was born in Athens. Since then he has been one of Greece's leading representatives at Olympiads and other international events.
His tournament achievements include joint first places at Panormo 1998 and Gibraltar 2003. He has participated in three of FIDE's World Championship knockout tournaments, but has never made it further than the second round. Kotronias is an eight time Greek champion.
🔰Between 1998 and 2004, he represented Cyprus, but has since switched federations to become a Greek national player once again.
He was a candidate for the European Parliament with The River, in the elections of 25 May 2014.
♦️ A memorable game by Vasilios Kotronias👇
🔸Vasilios Kotronias vs Francisco Vallejo Pons
🔸10th European Individual Championship (2009), Budva MNE, rd 5, Mar-10
🔸Caro-Kann Defense: Classical Variation. Main lines (B18)
♦️Review and download PGN file👇
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@unitychess
@Kotronias-VallejoPons 2009.pgn
807 B
🔹 Vasilios Kotronias - Francisco Vallejo Pons, 10th European Individual Championship (2009)
🔹 PGN format
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@unitychess
🔹 PGN format
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@unitychess
37... e4??
Mamedyarov makes a huge blunder in a winning position.
37... Qg5 -+
38. Qxd3 1-0
Mamedyarov makes a huge blunder in a winning position.
37... Qg5 -+
38. Qxd3 1-0
61. Kf4??
Dominguez probably thought that grabbing the e6 pawn would be a mistake, but: 61. Rxe6! Bd7 62. Kg3 =
61... Kd6 62. Rg5 Rh4+ 63. Ke3 Rh3+ 64.Kd4 Rxa3 0-1
Dominguez probably thought that grabbing the e6 pawn would be a mistake, but: 61. Rxe6! Bd7 62. Kg3 =
61... Kd6 62. Rg5 Rh4+ 63. Ke3 Rh3+ 64.Kd4 Rxa3 0-1
30. Qe3??
Aronian's blunder.
30. Rg4 Rh1 -/+ would have put up more stubborn resistance.
30... Rxc4 0-1
Aronian's blunder.
30. Rg4 Rh1 -/+ would have put up more stubborn resistance.
30... Rxc4 0-1