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The example below is for the opening position, so no moves are shown in the heading. The first row provides the move numbers with subsequent rows representing different variations. Since the initial position is not always the opening position, these numbers will not always start at "1." White half-moves are shown above black half-moves.
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").
Crack tip opening displacement (CTOD) or is the distance between the opposite faces of a crack tip at the 90° intercept position. The position behind the crack tip at which the distance is measured is arbitrary but commonly used is the point where two 45° lines, starting at the crack tip, intersect the crack faces. [ 1 ]
The openings are provided in an ECO table that concisely presents the opening lines considered most critical by the editors. ECO covers the openings in more detail than rival single volume publications such as Modern Chess Openings and Nunn's Chess Openings, but in less detail than specialized opening books.
Since 1980, there have been other one-volume opening encyclopedias to rival MCO: Batsford Chess Openings (BCO) in 1982 and 1989, and Nunn's Chess Openings (NCO) in 1999. John Watson wrote that MCO-13 "really isn't up to modern expectations", [ 3 ] but called MCO-14 "a vast improvement over its predecessor No. 13 in almost every respect" and ...
Réti popularized these moves against all defenses in the spirit of hypermodernism, and as the opening developed it gained structure and a clearer distinction between it and other openings. Hans Kmoch called the system of attack employed by Réti in the game Réti–Rubinstein, Carlsbad 1923, [5] "the Réti Opening" or "the Réti System".
The table below summarizes the preferred moves for each of the 15 possible opening rolls, as selected by detailed computer simulations, referred to as "rollouts". [3]The first column is the move that the rollout says gives the most equity (i.e. the average profit or loss that one would net, per game, by playing the position to conclusion an infinite number of times). [4]
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