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19-472: SGF may mean: Smart Game Format , a computer file format Société générale de financement , Québeca, Canada South Glens Falls , a village in upstate New York Sovereign Grace Fellowship of Canada , for Baptist churches Springfield–Branson National Airport , Springfield, Missouri, US, IATA code The Spaceguard Foundation , to protect Earth from collisions with astronomical objects Topics referred to by

38-471: Is composed of pairs of properties and property values, each of which describes a feature of the game. A partial list of properties appears below. There is no strict checking of the contents of these tags, so it is possible to put any text into the result tag for example. Variations are nested in brackets, and also usually assigned letters. The first branch (variation A) is the main branch. This notation stems from Newick format . The first letter designates

57-420: Is different from Wikidata All article disambiguation pages All disambiguation pages Smart Game Format The main purposes of SGF are to store records of played games and to provide features for storing annotated and analyzed games (e.g. board markup, variations ). It is a text-only, tree-based format. Most Internet Go servers and Go software from 1990 support this format. An SGF file

76-423: Is no standard designation for many properties that one might wish to represent is not really a limitation. The system is extensible, one can invent new labels, and of course that has happened already. After a while, the popular ones among the new labels become standard. Lines of Action Lines of Action (or LOA ) is an abstract strategy board game for two players invented by Claude Soucie. The objective

95-567: Is to connect all of one's pieces into a single group. The game was recommended by the Spiel des Jahres in 1988. The object of the game is to bring all of one's pieces together into a contiguous body so that they are connected vertically, horizontally or diagonally ( 8-connectivity ). A piece may not jump over an enemy piece. Thus in the diagram below, White cannot play a6-d6, even though there are three pieces in row 6. White might instead play a6-c4, moving two spaces because there are two pieces in

114-564: The World Championships at the Mind Sports Olympiad score simultaneous connection as a draw. The game can become quite tactical in open positions where the pieces on both sides are mobile. The strategic depth of the game, however, derives to a large extent from blocking strategies designed to limit the opponent's mobility. It can be advantageous to pin one or more enemy pieces against the side of board by moving in

133-440: The black pieces on f1. [REDACTED] A player who is reduced to a single piece wins the game, because his pieces are by definition united. If a move results, due to a capture, in each player having all his pieces in a contiguous body, then either the player moving wins, or the game is a draw, depending on the rules in force at the particular tournament. In the original 1969 edition of A Gamut of Games, simultaneous connection

152-494: The blockade of the first rank. The piece moves three squares, jumping over a friendly piece. White, despite the substantial disadvantage of moving second, apparently is in the lead now due to the reduced mobility of Black's first-row pieces. White will soon play a2-d2, continuing to build his own bridge and forcing Black's piece on e1 to move sideways if it wants to join the game. It hardly helps for Black to try to escape with e1-c3, because that allows White to capture with a5:c3. In

171-657: The board corresponds to the way most modern computers represent screen coordinates to simplify integration of text and graphics. Games currently supported are Amazons , Ataxx , Backgammon , Blokus , Byte , Chase , Chess , DVONN , Exxit , Focus , Gess , GIPF , Go , Gobblet , Gomoku + Renju , Hex , Hive , Hnefatafl , Jungle , Kropki , Kuba , Lines of Action , Neutron , Nine men's morris , Octi , Philosopher's Football , Plateau , PÜNCT , Quadrature , Reversi (Othello), Sahara , Shogi , TAMSK , Tantrix , Trax , Tripples , Tumbling Down, TwixT , Xiangqi , YINSH and ZÈRTZ . Although not officially supported,

190-437: The column (left to right), the second the row (top to bottom). The upper left part of the board is used for smaller boards, e.g. letters "a"-"m" for 13*13. The author intentionally broke with the tradition of labeling moves (and points) with letters "A"-"T" (excluding "i") and numbers 1-19. Two lower-case letters in the range "a"-"s" were used instead, for reasons of simplicity and compactness. The upper left corner as origin of

209-449: The diagonal (a6-f1) in which White is moving. [REDACTED] A piece may jump over friendly pieces. Thus Black may continue with e8-b5, jumping his own piece. He moves three spaces because there are three pieces in the diagonal (a4-e8) in which he is moving. [REDACTED] A piece may land on a square occupied by an enemy piece, resulting in the latter's capture and removal from the game. For example, White may play h3-f1, capturing

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228-417: The diagram below, White has made a move that connects all his pieces while Black is still at least two moves from such a state. Thus, White has won the game. [REDACTED] The World Championships take place annually at the Mind Sports Olympiad . World champions from 1997 onwards are given in the list below. A variant of Lines of Action with a different starting position was also proposed by Soucie and

247-411: The file: b1 and b8. This move gives White no opportunity to capture, and threatens to hem in the pieces on the a-file. [REDACTED] White moves h4-f2. The piece moves two spaces because there are two pieces in the diagonal: h4 and e1. White threatens the mobility of Black's pieces in the bottom row. [REDACTED] Black plays d1:a4, jumping over his own piece (which is permitted) and capturing

266-403: The same term [REDACTED] This disambiguation page lists articles associated with the title SGF . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=SGF&oldid=1167112671 " Category : Disambiguation pages Hidden categories: Short description

285-505: The second row or column. Having more pieces is usually an advantage, because they can limit the opponent's options as they mass together. On the other hand, material considerations are not all-important, because having fewer pieces also means having fewer to unite. The above moves illustrated the rules, but not necessarily good play. The following moves are more typical of expert play. [REDACTED] Black plays b1-b3. The piece moves two squares vertically, because there are two pieces in

304-547: The sgf format is also used for Meridians . The standard specifies additional game-specific properties for Go, Backgammon, Lines of Action, Hex, Amazons, Octi, Gess, and TwixT. The first version of SGF, FF[1], was conceived by Anders Kierulf in 1987. It is Appendix A in his Ph.D. thesis. FF[3] was written by Martin Müller in 1993. The current version of the SGF is FF[4] by Arno Hollosi, and is supported by most current SGF readers. FF[2]

323-465: The white piece at a4. Note that Black moved three spaces, as there were three pieces in the diagonal: a4, b3, and d1. It isn't clear whether the capture is advantageous or not. Black does now have an extra piece, but the move didn't do much to block White or build a central mass for Black. Usually early captures on the edge are not especially powerful, whereas early captures in the center are extremely good. [REDACTED] White plays h2-e2, continuing

342-433: Was described as a draw. In the second edition, the rules were changed to declare this a win for the player moving. Here is Sid Sackson's note in the preface to the second edition: "Claude Soucie and I are all that remains of N.Y.G.A. At his request, I have corrected an error in the rules for LINES OF ACTION, eliminating possible draws." However, despite the intention of the inventor of LOA, most present day tournaments including

361-527: Was never made public. The format has been published under the Open Content License . Current development status (2016) is "not active". FF[4] is outdated, but has not been replaced by something more recent. For a description of current usage and some recommendations, see. The FF[4] standard has some problems that make it impossible, or at least unreasonable, to adopt it for large game collections. For some discussion, see. The fact that there

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