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👆 | Akihito Hirose XNUMXth Dan wins after re-pointing Sennichite in the opening round Tadahisa Maruyama XNUMXth Dan and Waseda OB confrontation / Shogi / JT Cup


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Akihito Hirose XNUMXth Dan wins the opening round after re-pointing to Sennichite Tadahisa Maruyama XNUMXth Dan and Waseda OB confrontation / Shogi / JT Cup

 
If you write the contents roughly
Maruyama Kudan's XNUMXth move was replaced by a one-handed loss angle, and Hirose Kudan had a difficult early and middle stage, but his patience turned around at the end.
 

The first station of the first round, which is the opening game of the Shogi Japan Series JT Pro Official Game, was held on June 1th, and ... → Continue reading

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Back turn one move

Shogi > Shogi tactics > Locomotive > Corner change > Back turn one move
△Holding piece corner
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Shogi zver 22.png
▲No holding piece
Up to △8 octagonal

Example of changing the loss angle after the first move

Back turn one move(Goteban is different,British: Gote's One-turn-loss Bishop Exchange[1]) IsShogi OfTacticsso,Corner changeKind of. In the match record etc., omit it and simplyOne hand loss corner replacementAlso called[2]. Hitoshi AwajiIs the creator. Takashi AbeInstinctively said to Awaji, who pointed at this hand, "Teacher, you should stop."Aono Teru CitySeeing Awaji's game record, he said that he was quite successful, and he started to point in the ranking battle A class. According to Aono, even if it is a smashing car, it is meaningful that it is better to not hit the destination of the turn, but since it intentionally loses hands early in the beginning, there was hesitation with active professional players, but from before.Shigekazu Minamiguchi,Seiichi KoboriIt was said that they had been pointed to bring them to their favorite corners to avoid the Yakura battle, and it was not a strategy to hold the destination ahead until now.

2004From around that time, professional chess players have been widely adopted. In 2007, he was ranked 10rd in the top 3 new shocks and new tactics selected by active players.

Shoji Segawa was delighted to have lost one hand immediately after he was pointed at the tournament by an amateur powerhouse when the one-handed loss angle replacement was not yet pointed to by a professional, and immediately after leaving the encouragement party and returning to the amateur tournament. However, it is said that he was successfully pointed and defeated. After that, it became popular among professionals, and it was said that there was a foresight.[3].

2005 OfMaster game(Toshiyuki MoriuchiToYoshiharu HanyuChallenge), the strategy was adopted in 7 out of 2 games (result 1 win 1 loss).

Awaji is the 33rd (2006Kozo Masuda AwardWon[4].

In addition, shogi had previously been considered to have a slight advantage, but in 2008Japan Shogi FederationIn the official game, the win rate for the second hand exceeded that for the first time since the start of the statistics, although it was slightly different from .503-.497.[5].Aono Teru CityAccording to the report, the most important contributor to this case is the change in turn after this.[6].

Corner changeIn the early stage of the second half, he changed corners early in order to skip △8 five steps. Because of that, it is a strategy that could not have been thought in the past, that you lose one move on the back[7].. Specifically, if you lose one step of △ 8 steps, the steps of 8 go down to 8, so there is room to jump Keima to 8 (this also means attacking. , It also means that it is harder for the enemy to aim at the 7-three Katsura). This is the essence of this tactic[8].

Deployment example

To replace the conventional cornerPerched silver-Climbing silver-Early silverThere are 3 tactics. In the following, we will describe the development of each tactical strategy.

Perched silver

△Holding piece corner
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998979695949392919
Shogi zver 22.png
▲Holding piece corner
Stool silver △7 up to Sankatsura
△ Sakata Mochikoma Kaku
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998979695949392919
Shogi zver 22.png
▲Doi Mochikoma Kaku
Figure 1 ▲4 up to XNUMX steps

Corner changePerched silverAlmost the same as. However, when it becomes a so-called stool silver type with a corner change, since the step ahead of the rear hand is at 8 instead of 8, the range of moves widens as it is possible to counterattack from △ 8 Katsura The width has expanded. Compared to the conventional △8 five-step type, although it is not a pure advantage even with the same type stool silver, it is easy to avoid the development where the initiative is unilaterally held to some extent because the hands are spreading ..

Figure 1 is the forerunner of October, Taisho 6Ichitaro DoiSequelMiyoshi SakataWar.In this battle, Sakata has adopted a one-handed loss angle replacement, which is rare even at that time.The situation is as follows: ▲ 1 4 steps in Fig. 2 △ Same step ▲ 3 4 steps △ Same step ▲ 4 3 steps △ 7 Sankin right ▲ XNUMX One corner △ XNUMX Five steps ▲ XNUMX Square formation.

Initially, without making any special efforts on the first move and the second move, if you assemble it into a regular stool with a normal corner change, the situation would look like the example, and there were quite a few points in this order. This phase first appeared in Kyoji Tanigawa vs. Takayuki Yamazaki, the first mover of the 2003 Ryuo match, and then the first move wins eight consecutive games. By 8, the first player had 2010 wins and 28 losses, with a win rate of 15 minutes. However, if it is limited to 6 or later, 5 stations will be pointed to, and the succeeding player will win with 1 wins and 1998 losses. After that, the response of the first move shifted to early silver and stick silver, and it became the last resort for the first move.

In the case of "Image and Yomi Shogi No. 2" (2010, Japanese Shogi Federation), in the case of the example, the back team can fly as much as △8 Katsura, and Koji Tanigawa's advantage has already disappeared in this order. I am trying. Furthermore, Akira Watanabe does not have the ability to attack Keito with ▲7 five steps from the beginning, and the back team receives only on the right side, which makes it easier. It seems that Zenji Hanyu seems to have a slight difficulty in starting the game, and Yasumitsu Sato says that it is difficult to point ▲4 steps from this stage.

Climbing silver

△Holding piece corner
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948474645444342414
958575655545352515
968676665646362616
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988878685848382818
998979695949392919
Shogi zver 22.png
▲Holding piece corner
Stick silver ▲1 up to XNUMX silver

From the standpoint of the front end, it is natural to think of bringing it to an early stage of development as it directly points out the hand loss of the second hand. Can fight faster than perched silverClimbing silverIt was thought that if he challenged himself, the lost hand would be at a disadvantage, and he was tested. However, since the lead swiping silver is a conventional turnable type and the winning rate is not good, many people think that even one loss can be done behind to some extent, it seems to be a clear measure even though it is influential. Also, in the case of the development of the silver with the mover stick, because it lost one move, it has a shape of Δ8 four steps, so after the silver incense exchange with one line, the offensive line from ▲1 hexagon to ▲6 four incense is erased. Is also one of the effects of one hand loss[9].. In particular, the super-cute battle of the example appeared in Toshiyuki Moriuchi vs. Zenji Hanyu in the final tournament of the 1999nd Ryuo Battle in 22. In the Moriuchi Hanyu game, ▲1 1 steps △ Same step ▲ Same silver △ Same scent ▲ Same scent △ 1 2 steps ▲ 2 2nd step Hanyu behind △ 2 Because 2 silver hits do not have a good impression △ 2 With 1 silver did. If Moriuchi is also a silver hitter, he will have to maintain the shape of the ball for a while, but this is more scary because it will soon become a battle. △2 Two silvers or less is ▲6 four steps △Same step ▲Same flight △5 Three silver hits ▲7 Hachihi △3 Two silver ▲2 Four steps △XNUMX Three silver ▲XNUMX Hexagon △XNUMX Square ▲XNUMX Square △XNUMX Three steps ▲ XNUMX It was said that it was difficult to decide whether it was the order in which the first move pointed out because it became a fierce battle with Nanako. On the other hand, it is difficult for the rear players to avoid this shogi procedure.

From the appearance of this phase until March 2010, four stations were pointed in the official game, and the result was 3 wins and 4 days. Since it is not pointed out unexpectedly, there are many unknown parts.

Early silver

△ Mochikoma Kakuho
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928272625242322212
938373635343332313
948474645444342414
958575655545352515
968676665646362616
978777675747372717
988878685848382818
998979695949392919
Shogi zver 22.png
▲ Mochikoma Kakuho
Fast-forward silver △8 Up to XNUMX steps

After all in order to blame the handEarly silverWas also influential and was in fashion for a while. In the beginning, in order to avoid this premature silver, the latter hand often proceeded with the piece assembly without receiving the one-step hit. However, in that case, the first move can reach the end with ▲1 five steps, so ▲1 five step type first moveYou YuThat means has become influential.

At present, there is a method in which, without avoiding early-advanced silver, the back hand intentionally stretches out the steps that were supposed to be compromised by 8 steps, and the stool silver that has a good compatibility with early-advanced silver is used.[10], It has not reached the point where it is clearly on the play. The situation in the example figure is pointed out from the time of appearance to March 2010, and the first move is 3 wins and 25 losses, which is a bad result, so it is difficult to do the first move. As a result, from this stage, it was difficult to point to ▲ 44 four steps, and ▲ 2 nine balls increased. Below, the back is △ 7 six steps ▲ same step △ same flight ▲ 8 four steps △ same step ▲ 2 seven corners and ▲ 7 four same silver, etc., ▲ 2 nine balls instead of ▲ 7 four steps To go.

According to Takeshi Fujii and Toshiyuki Moriuchi, the open bottle of the fly car is a weak point, and it is easy to be targeted. ..

footnote

[How to use footnotes]
  1. ^ Kawasaki, Tomohide (2013). HIDETCHI Japanese-English SHOGI Dictionary. Nekomado. P. 38. ISBN 9784905225089 
  2. ^ The winner and loser Hoshitori (○●) know which is the future.
  3. ^ Interview: Shoji Segawa 100th Dan x Kenji Imaizumi XNUMXth Dan "B-class tactics are so much fun" ("Shogi World Special Shogi Strategy Encyclopedia XNUMX+" (edited by Shogi World Editorial Department, Mynavi Publishing))
  4. ^ According to Aonoteru-shi, Awaji seems to be one point.
  5. ^ "In the game of the official game in 2008, the first post-game has won since the start of statistics!”. Japan Shogi Association (June 2009, 3). 2011/10/25Browse.
  6. ^ Aono (2009) p.3
  7. ^ Aono (2009) p.3
  8. ^ Aono (2009) p.3, pp.9-15
  9. ^ Aono (2009) p.165 However, the changes mentioned here are not easy.
  10. ^ Aono (2009) p.160

References

  • Aono Teruichi, 2009, "Return turn one hand loss corner replacement tactics", Sogensha <super shogi course> ISBN 978-4-422-75114-6

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