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Wrong Diagonal Bishop

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The Wrong Diagonal Bishop or Parallel-Diagonal Bishop (筋違い角 or 筋違角 sujichigai kaku ) is a shogi opening characterized by a bishop trade followed by dropping the bishop in hand on the 45 square if played by Black or the 65 square if played by White.

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35-450: The Wrong Diagonal Bishop opening is one of the oldest shogi openings appearing around the same time as the Black's Static Rook vs White's Traditional Ranging Rook type of openings (thus predating other old openings such as Fortress , etc). The Wrong Diagonal Bishop frequently appears in the recorded handicap games from the Edo period . The name comes from the bishop being only able to move to squares that are not available from

70-620: A Floating Rook shape. It aims for a surprise edge attack on the ninth file with support from the floating rook if the Ranging Rook opponent uses a Mino castle . Kurukuru Bishop (クルクル角 kurukuru kaku ) is a Static Rook opening similar to the Iijima Bishop Pullback. It is characterized by not opening the bishop's diagonal with a pawn push and instead moving the bishop up to the player's left edge (B-9g for Black, B-1c for White). The player subsequently moves their up to

105-452: A Ranging Rook player must spend several moves developing their generals in order to keep their line of pawns defended while also clearing a path on rank 2 for the rook to be swung over to a Ranging Rook file. Needless to say, this second option often leaves White with more limited castle options. After Black's bishop drop, White has several options to defend their central pawn. Three are listed here. Other options are listed in

140-408: A Static Rook or Ranging Rook position. Unlike the first Bishop Exchange variation, this Primitive variation has Black losing tempo. One of the aims of Primitive Wrong Diagonal Bishop as played by Black is to make it difficult for White to play a standard Ranging Rook strategy as in order to do White's rook must be moved twice (first to the sixth file, then to the fourth file) losing tempo . Otherwise,

175-498: A bishop trade, Senzaki also captured Takeichi's pawn on the seventh file. Takeichi played an Opposing Rook position with his bishop on the central file. It's also possible to play a Wrong Bishop Diagonal opening if White trades off the bishops first. This opening was played by Ryō Shimamoto against Hiroshi Kobayashi in 2016. Presumably, Kobayashi made the bishop trade in order to play a Tempo Loss Bishop Exchange opening. However, Shimamoto foiled Kobayashi's preparation by dropping

210-431: A castle development on the player's left side of board. In the adjacent diagram is an example of a castle built on the left side of the board paired with a Static Rook position. The castle is a Left Silver Crown Anaguma (with advanced edge pawn). Static Rook castles can be divided into two main categories: Double Static Rook castles and Counter-Ranging Rook castles. Different structures are required in these two cases since

245-500: A time, amateurs shied away from Static Rook, as there are many more jōseki lines to memorize when compared with the Ranging Rook, which almost always used a variant of the Mino Castle . However, entering into the 21st century, Ranging Rook has also seen a greater diversification of tactics, such as with Ranging Rook Bishop Exchange, Ranging Rook counter-attacks, and even the appearance of Double Ranging Rook, which has largely closed

280-451: A version of the Mino castle called Left Mino and the Ranging Rook player might build a version of anaguma, known as Ranging Rook anaguma . One of the most prominent features of a Static Rook position is pushing the pawn directly above the rook forward. In even games, this forward marching rook pawn (飛車先 hisha saki ) bears down directly on the opponent's bishop, which in the initial position

315-566: A wide variety of forms that are dependent upon the specific opening used. Some openings like Fortress and Bishop Exchange openings have the king moved leftward away from the rook in compact castles while openings like Double Wing Attack and Side Pawn Capture have rather minimal castle formations with much less king safety in a trade off of defending wider areas within the Static Rook side's camp in order to defend against future piece drops. Iijima Bishop Pullback (飯島流引き角 Iijima-ryuu hiki kaku )

350-434: Is a Static Rook opening used against a Ranging Rook opponent. It is characterized by not opening the bishop's diagonal and instead moving the bishop down (to 3a if played by White or 7i if played by Black) so that it can then exit one's camp via the central file. Takishita's Spread Golds (滝下流対振り飛車金開き takishita-ryū tai furibisha kinbiraki ) is a Counter-Ranging Rook trap opening that uses a Central House castle along with

385-426: Is a variant of Climbing Silver that attempts to use only a silver, rook, and pawn to attack. It is called primitive since such a simple strategy will not be successful if defended against properly. Reclining Silver (腰掛け銀 koshikake gin ) is a formation in which a player's right silver has advanced to the front of their camp on the middle 5th file and has an advanced pawn on the silver's right and pawn directly under

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420-440: Is one of two major opening strategies in shogi . In the opening, the major piece of the rook fights from its starting position on the right side of the board (the 2nd file for Black, Sente, and the 8th file for White, Gote). In contrast, the other major opening deploys the rook to the center or left half of the board in the opening, and is known as Ranging Rook or Swinging Rook (振り飛車 furibisha). Compared with Ranging Rook, leaving

455-580: Is quite different from the Primitive Wrong Diagonal Bishop in that there is much more piece development preceding the bishop drop. Also, the Wrong Diagonal bishop drop can only be made by Black since Black's pawn on 76 is already defended by the silver on the 77 square, which, needless to say, eliminates the possibility of Double Wrong Diagonal Bishop variations. Static Rook Static Rook (居飛車 ibisha ) openings

490-406: Is undefended. When faced with this rook pawn push, the Static Rook's opponent must prevent this pawn from breaking through their camp by developing a piece to defend this file. In addition, the opponent must decide whether to allow the Static Rook player to exchange this rook pawn off the board or to prevent this pawn exchange from happening. The Rook pawn exchange. G-32. S-32. Preventing

525-545: The Bishop Exchange opening was most popular during the 1950s and was often played by Yasuharu Ōyama and Masao Tsukada . Unlike the Primitive variations discussed in the earlier sections, the Bishop Exchange variation proceeds like all other Bishop Exchange variations until just after White trades off the bishops. It is at this point that the bishop in hand can be dropped to the wrong diagonal. Thus, this opening

560-546: The Double Wrong Diagonal Bishop section below. The Takeichi Wrong Diagonal Bishop (武市流 takeichi-ryū ) is a variation developed by Saburō Takeichi (武市三郎). There are three main variations of Double Wrong Diagonal Bishop. The Double Wrong Diagonal Bishop B*65 variation appears in the Saburō Takeichi vs Manabu Senzaki Meijin ranking tournament on 1990 June 18. After rejecting

595-425: The Ranging Rook side has swung their rook to. In the case of a slow game, the main focus will be less a matter of the attack and more a matter of the castle strength of either side, and the opening will be defined strictly by defensive tactics. Both the Static Rook and Ranging Rook sides move their kings away from their rooks to castle (Static Rook castles to the left, Ranging Rook castles to the right). In general, as

630-511: The Rook pawn exchange. P-34, B-33. P-14, B-13. P-34, S-32/S-42, S-33 (P-34) R-22. ii. Lx1e   P*1c The Climbing Silver (棒銀 bōgin ) attack involves advancing a silver upward along with an advanced or dropped pawn supported by the rook aiming to break through the opponent's camp on their bishop's side. In the board diagram here, the Black's silver has successfully climbed to

665-511: The Wrong Diagonal Bishop drop occurs immediately after the bishop trade off. The other variation – Primitive Wrong Diagonal Bishop (原始筋違い角) – has a very early bishop trade off and subsequent bishop drop. This occurs directly after the players' bishop diagonals are opened after the third move (or the fourth move if played by White). This set of variations leads to more unusual formations in which either player could play alternately

700-487: The attack patterns of the player's opponent differ. In Double Static Rook openings, a Static Rook player's king is initially threatened from above by the opponent's rook which has remained on its starting square. In Counter-Ranging Rook openings, the Static Rook king is initially threatened from the king's right side and/or obliquely from the king's right upper corner. Castles in Double Static Rook openings have

735-480: The bishop to 45 after Kobayashi moved his silver up to 22. This move sequence was 1.P-76 P-34 2.P-26 Bx88+ 3.Sx88 S-22 4.B*45. This is a variation introduced by professional shogi player Takeshi Ōwaku (大和久彪) in 1937. In contrast to the above, White encourages Black to make the bishop trade instead, which results in White not losing tempo. The Wrong Diagonal Bishop variation of

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770-428: The bishop's start position – thus, the wrong diagonal. The main point of dropping the bishop is to fork two opponent pawns. Since the opponent is most likely to defend the pawn in their camp, the player can get a material advantage of one pawn. Furthermore, adopting such an early attack can put pressure on their opponent and disturb their normal development in other openings. After the bishop drop and pawn capture,

805-633: The common Bishop Exchange is categorized separately from the Tempo Loss Bishop Exchange , and the Gangi castle , which has been popular in recent years, was included in its own category. To simplify, examples of the four main lines are as follows. From any of these positions, a variety of different tactics may develop. In a Double Static Rook opening, there is no clear advantage to Sente nor Gote, and there are strategies that can be adopted by either position. In Yagura or Bishop Exchange,

840-421: The e rank on the first file (1e). A subsequent attack by Black, for example, could aim to sacrifice this silver in order to remove White's lance and then drop a dangling pawn within White's camp that threatens to promote. Climbing Silver formations may be used with several different Static Rook openings such as Fortress , Double Wing , and Bishop Exchange . Primitive Climbing Silver (原始棒銀 genshi bōgin )

875-546: The first rank and moving it to the left-side, and so on. In Double Static Rook games (相居飛車, ai ibisha ), it is common for both players to try and keep pace with their opponent as they develop their pieces during the opening, and avoid moves that would result in a disadvantage. The main lines of this kind of game can be categorized into Yagura , Bishop Exchange , Double Wing Attack , and Side Pawn Picker , but there are many variations that these could be sub-divided into. It could be said that there are actually six main lines, if

910-407: The gap between difficulty curves. Further, between professionals, there is less of a distinction between Static Rook and Ranging Rook players, and the number of all-rounders are growing. In recent years, the traditional view of "Static Rook Patterns" and "Ranging Rook Patterns" have been overwritten by the growing popularity of unconventional playstyles, such as right-side king, pulling the rook back to

945-484: The king is normally kept near the center so that the entire camp can be quickly defended, and the Central House formation is often used. In games against Ranging Rook , the Static Rook side may choose to stick with a simple castle and immediately initiate a rapid attack or take the time to build up a stronger castle and play a slow game. In the case of a rapid attack, the opening will vary depending on which file

980-619: The middle e rank and then down to central file (B-7e ... B-5g for Black, B-3e ... B-5c for White.) The player can then castle their king leftwards into a Left Mino. YouTube: HIDETCHI's Shogi Openings: Yasuharu %C5%8Cyama Yasuharu Ōyama (大山 康晴 Ōyama Yasuharu, March 13, 1923 - July 26, 1992 ) was a professional shogi player, 15th Lifetime Meijin and president of Japan Shogi Association (1976 - 1989). He studied shogi under Kinjiro Kimi ( 木見金治郎 , Kinjirō Kimi ) . He won 80 titles (2nd on record), 44 other type tournaments (2nd on record) and 1433 games (2nd on record) in life, and

1015-542: The oldest player to challenge for the Meijin title, at age 63 in 1986. Ōyama played as professional from 1940 until his death in 1992. His students include Michio Ariyoshi , Isao Nakata and Hisashi Namekata . He was awarded as honorary citizen of Kurashiki, Okayama , his birthplace and then Hyakkoku, Aomori (now merged to Oirase, Aomori ). Ōyama had a strong interest in other kinds of boardgames, including go , mahjong , chess , chu shogi and xiangqi . He founded

1050-436: The opponent's rook will be attacking from the side, both sides will build a castle shape that can withstand an attack from the side. For the Static Rook side, popular choices would be the quick but less sturdy boat castle for a rapid attack game, and the slower but sturdier anaguma for a slow game. For the Ranging Rook side, the quick and sturdy Mino castle is mainly used. Otherwise, the Static Rook player may choose to build

1085-466: The player must then contend with whether they will retreat their bishop to the left or right side. There are two main types of Wrong Diagonal Bishop openings. One variation stems from the Bishop Exchange opening, which is a Double Static Rook opening where both players advance their rook pawns and develop their left silvers to prevent each other from trading off their rook pawns. Here

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1120-734: The rook in its starting position on the 2nd file (8th file for Gote), or in that general area on the right side, can be a more natural idea for a strategy. Although the rook does move in strategies where it's placed on the 3rd file (7th for Gote), such as with Sleeve Rook , or on the 4th file (6th for Gote), such as with Right Fourth File Rook , these openings are still broadly classified as Static Rook, rather than Ranging. The castles mainly used in Double Static Rook games are Yagura (Fortress), Gangi (Snowroof), and Left Mino (often seen vs Ranging Rook as well). In games against Ranging Rook, rapid castles, such as boat and elmo , or sturdier castles, such as anaguma and millennium , are often used. For

1155-506: The silver and gold are lined up vertically to create a strong defense to stop the incoming rook from advancing. When playing with the yagura system it is common to build a yagura castle up on the left side and then move the king into this safer position. On the other hand, Double Wing Attack and Side Pawn Picker largely forego this defense in order to begin a rapid attack, freeing up both rooks to run around in any direction and attack from different locations. To be able to respond to these attacks,

1190-628: The silver. The reclining name is meant to describe the way this silver rests on these two pawns as if it were seated on them. In the board diagram, both Black and White have created Reclining Silver positions. Black has their silver on 5f (with pawns on 4f and 5g) while White has their silver on 5d (pawns on 5c, 6d). Reclining Silver can often be played as a component of different Static Rook openings such as Double Wing or Bishop Exchange. (However, it can also be played in Double Ranging Rook games.) Most Static Rook openings coincide with

1225-471: Was awarded five lifetime titles: Lifetime Meijin, Lifetime Jūdan, Lifetime Ōi, Lifetime Kisei and Lifetime Ōshō. Among his 80 titles, 18 were the Meijin title (most prestigious title in shogi, along with Ryūō ). He has appeared in the Meijin title match 25 times winning 18; he also holds the record for the most consecutive Meijin titles (13 in a row from 1959 to 1971), the most overall Meijin titles, and being

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