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An EF5 rating on the new scale requires a higher standard of construction in houses than does an F5 rating on the old scale. So, the complete destruction and sweeping away of a typical American frame home, which would likely be rated F5 on the Fujita scale, would probably be rated EF4 or lower. [51]
The Van 't Kruijs [a] Opening (Dutch pronunciation: [vɑn ət ˈkrœys]) is a chess opening defined by the move: . 1. e3. It is named after the Dutch player Maarten van 't Kruijs (1813–1885) who won the sixth Dutch championship in 1878.
This is a list of chess openings, organised by the Encyclopaedia of Chess Openings (ECO) code classification system.The chess openings are categorised into five broad areas ("A" through "E"), with each of those broken up into one hundred subcategories ("00" through "99").
Black's most common response is 1...d5, when the game can take on the character of a Dutch Defence (1.d4 f5) with colours reversed. White will then often either fianchetto their king's bishop with Nf3, g3, Bg2, and 0–0 with a reversed Leningrad Dutch; adopt a Stonewall formation with pawns on d4, e3, and f4 and attempt a kingside attack; or fianchetto their queen's bishop to increase their ...
The Dutch Defence is a chess opening characterised by the moves: . 1. d4 f5. Black's 1...f5 stakes a claim to the e4-square and envisions an attack in the middlegame on White's kingside; however, it also weakens Black's kingside to some extent, especially on the e8–h5 diagonal. [1]
F5 and EF5 Tornadoes in the United States 1950–2019 Detailed map. The tornadoes on this list have been formally rated F5 by an official government source. Unless otherwise noted, the source of the F5 rating is the U.S. National Weather Service (NWS), as shown in the archives of the Storm Prediction Center (SPC) and National Climatic Data ...
From's Gambit – A02 – 1.f4 e5 [1]; Swiss Gambit – A02 – 1.f4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4 [1]; Williams Gambit – A03 – 1.f4 d5 2.e4 [1]; Hobbs Gambit – A02 – 1.f4 g5 [16]
The Barnes Opening (sometimes called Gedult's Opening) is a chess opening where White opens with: . 1. f3. The opening is named after Thomas Wilson Barnes (1825–1874), an English player who had an impressive [1] eight wins over Paul Morphy, including one game where Barnes answered 1.e4 with 1...f6, known as the Barnes Defence.
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