Alexander Alekhine

Alexander Alexandrovich Alekhine, PhD was the fourth World Chess Champion. He is often considered one of the greatest chess players ever.

By the age of 22, he was already among the strongest chess players in the world. During the 1920s, he won most of the tournaments in which he played. In 1927, he became the fourth World Chess Champion by defeating José Raúl Capablanca, who was widely considered invincible.

In the early 1930s, Alekhine dominated tournament play and won two top-class tournaments by large margins. He also played first board for France in five Chess Olympiads, winning individual prizes in each (four medals and a brilliancy prize). Alekhine offered Capablanca a rematch on the same demanding terms that Capablanca had set for him, and negotiations dragged on for years without making much progress. Meanwhile, Alekhine defended his title with ease against Bogoljubov in 1929 and 1934. He was defeated by Euwe in 1935, but regained his crown in the 1937 rematch. His tournament record, however, remained uneven, and rising young stars like Keres, Fine, and Botvinnik threatened his title. Negotiations for a title match with Keres or Botvinnik were halted by the outbreak of World War II in Europe in 1939. Negotiations with Botvinnik for a world title match were proceeding in 1946 when Alekhine died in Portugal, in unclear circumstances.

Alekhine is known for his fierce and imaginative attacking style, combined with great positional and endgame skill. Alekhine is highly regarded as a chess writer and theoretician, producing innovations in a wide range of chess openings, and giving his name to Alekhine's Defence and several other opening variations. He also composed some endgame studies.

Calculate the number 2142

NUMBERMANIA: Calculate the number 2142 using numbers [2, 5, 7, 8, 58, 187] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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0
Points: 
10

Decrypt multiplication and determine the value of the number ABA

Decrypt multiplication and determine the value of the number ABA
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Correct Answers: 
9
Points: 
2

Which is a winning combination of digits?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
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Correct Answers: 
1
Points: 
10

Calculate the number 9783

NUMBERMANIA: Calculate the number 9783 using numbers [1, 5, 6, 5, 86, 893] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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Correct Answers: 
1
Points: 
10
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