Yamajunn's Shogi opening traps

Yokofutori : Ai Yokofutori part 1.

2009-12-05T22:05:00.005+09:00

Shogi Opening traps : Yokofutori : Ai Yokofutori part 1.

(diagram 1)

1.P-7f P-3d
2.P-2f P-8d
3.P-2e P-8e
4.G-7h G-3b
5.P-2d Px2d
6.Rx2d P-8f
7.Px8f Rx8f
8.Rx3d
(diagram 1)

The diagram 1 is a beginning of Yokofutori game . In Ai Yokofutori game , Gote captures the 7f-Pawn after the Bishop exchange like following line ; 8...Bx8h+ , 9.Sx8h Rx7f .

You may think "Why Gote player doesn't capture the 7f-Pawn without Bishop exchange with 8...Rx7f ?" . Because following moves gives Sente a nearly win advantage .

(diagram 2)

8...Rx7f
9.Bx2b+!
(diagram 2)

Replying Gote's 8...Rx7f , Sente simply exchanges the Bishops with 9.Bx2b+ . When Gote captures the 2b-promoted Bishop with 3b-Gold or 3a-Silver , the other piece will become unprotected .

(1)
9...Gx2b
10.Rx3a+

(2)
9...Sx2b
10.Rx3b+

Even if Gote drops a Pawn with 9...P*3c blocking the 3d-Rook's power , Gote will lose a Gold and a Silver and will have a bad position .
(3)
9...P*3c
10.+Bx3b Px3d
11.+Bx3a

Shogi Opening traps : classcial Kakukawari opening : part 3.

2009-10-21T08:15:00.000+09:00

Shogi Opening traps : classcial Kakukawari opening : part 3.

(diagram 1)

1.P-7f P-8d
2.P-2f P-8e
3.P-2e G-3b
4.B-7g P-3d
5.S-8h Bx7g+
6.Sx7g S-2b
7.S-3h S-7b
(diagram 1)

The diagram 1 is one of the common lines of classical Kakukawari opening . In the diagram 1 , You may think Sente can exchange the 2nd file Pawns . With 8.P-2d , how the game will advance ?

(diagram 2)

8.P-2d Px2d
9.Rx2d B*3c
(diagram 2)

Sente exchanged the 2nd file Pawns by his Rook . Gote drops a Bishop with 9...B*3c attacking the 2d-Rook .

Afte the diagram 2 , Sente's Rook will escape from the 2d Bishop with 10.R-2h or 10.Rx3d . But in both lines , Gote will get a better position with material advantage .

(1)
10.R-2h P-8f!
11.Px8f P*8h!

(2)
10.Rx3d P*2h

In both lines , Gote will get a Knight .

classcial Kakukawari opening : part 2.

2009-10-18T08:06:00.001+09:00

Shogi Opening traps : classcial Kakukawari opening : part 2.

(diagram 1)

1.P-7f P-8d
2.P-2f P-8e
3.P-2e G-3b
4.B-7g P-3d
5.S-8h Bx7g+
6.Sx7g S-2b
(diagram 1)

The moves shown above is the beginning of classical Kakukawari opening . In diagram 1 , you may think Sente can exchange the 2nd file Pawns with 7.P-2d . But this is a bad move . Why ?

(diagram 2)

7.P-2d Px2d
8.Rx2d B*3e
(diagram 2)

Sente exchanges the 2nd file Pawns by the Rook . Replying it , Gote drops a Bishop with 8...B*3e forking the 2d-Rook and the 5g-Pawn .

After the diagram 2 , Sente will play his Rook to escape from the 3e-Bishop's attack , and 2 major lines exist ; (1)9.R-2h and (2) 9.Rx3d .

Even if Sente selects any move , Gote will get an advantage by following moves .

(1)
9.R-2h Bx5g+

(2)
9.Rx3d Bx5g+
** Attention ! 3b-Gold is protected by 8b-Rook . **

classcial Kakukawari opening : part 1.

2009-10-04T02:17:00.004+09:00

Shogi Opening traps : classcial Kakukawari opening : part 1.

(diagram 1)

1.P-7f P-8d
2.P-2f P-8e
3.P-2e
(diagram 1)

The diagram 1 is one of the standard beginning of classical Kakukawari opening .

You may think Gote can exchange the 8th file Pawns . If Gote exchanges the Pawns , how the game will advance ?

(diagram 2)

3...P-8f ?
4.Px8f Rx8f
5.P-2d Px2d
6.P*2c
(diagram 2)

Gote exchanges the 8th file Pawns . But by the exchange not only Gote but also Sente has a Pawn in hand .

Sente also pushes his Rook Pawn with 5.P-2d . Gote captured it and this capture makes a space on 2c . Sente drops a Pawn with 6.P*2c and kills the 2b-Bishop .

Then Sente gets an advantage in the diagram 2 .

By this reason , Gote will move 3...G-3b or 3...P-3d .

Yokofutori : NAITOU ryu San-San Kaku senpou : part 1.

2009-09-08T10:34:00.002+09:00

Shogi Opening traps : Yokofutori : NAITOU ryu San-San Kaku senpou : part 1.

(diagram 1)

1.P-7f P-3d
2.P-2f P-8d
3.P-2e P-8e
4.G-7h G-3b
5.P-2d Px2d
6.Rx2d P-8f
7.Px8f Rx8f
8.Rx3d B-3c
(diagram 1)

The diagram 1 is a typical starting of NAITOU ryu San-San Kaku senpou . In diagram 1 , you may think Sente can get material advantage by following moves ; 9.Rx3c+ Nx3c , 10.B*7g . After Gote's Rook escapes (for example 10...R-8b) , Sente will move 11.Bx3c+ Gx3c , 12 Bx3c+ (diagram 1') . Whether Sente can get an advantage or not ?

(diagram 1')

(diagram 2)

After diagram 1
9.Rx3c+ Nx3c
10.B*7g Rx8h+
11.Sx8h R*2g
(diagram 2)

Gote doesn't escape his Rook , but exchanges it with Sente's 8h Bishop . And after the exchange , Gote can drop his Rook before Sente and gets a slight advantage .

Then in many cases , Sente players move 9.R-3f .

Haya ISHIDA part 2.

2009-06-04T11:26:00.010+09:00

Shogi opening trap : Haya ISHIDA , part 2.

(diagram 1 )

1.P-7f P-3d
2.P-7e P-5d
(diagram 1)

Gote pushes the 5th file Pawn with 2...P-5d just after Sente shows the attitude he wants Haya ISHIDA . The P-5d has a mean to disturb Sente's Haya ISHIDA . If Sente still seletcts Haya ISHIDA , how Gote plays ?

(diagram 2)

after diagram 1
3.R-7h Bx8h+
4.Sx8h B*4e
5.B*8e
(diagram 2)

Sente slides his Rook to 7h as his first plan . But this move makes weak points in Sente's camp . Gote exchanged the Bishops and dropped one with 4...B*4e . Sente seems to protect it by dropping a Bishop . How Gote play ?

(diagram 3)

after diagram 2
5...P-8d
6.Bx6c+ G6a-5b
7.+B-6d R-6b
8.+B-4f Bx6g+
9.P*6h +B-6f
(diagram 3)

Sente pushes the 8th file Pawn and forces Sente to promote his Bishop . And the game has developped very rough one .

In many cases , Sente players dislike such a rough game . Then 3.P-6f is the most common move in diagram 1 .

Niteme San-Ni Hi senpou , part 3.

2009-05-04T16:49:00.006+09:00

Shogi Opening traps : Niteme San-Ni Hi senpou , part 3.

(diagram 1)

1.P-7f R-3b
2.P-9f
(diagram 1)

In this line , Sente pushed 9th file Pawn such an early stage of the game . Against this move , 2...P-9d seems very natural move . But this move lead an rough game .

(diagram 2)

after diagram 1
2...P-9d
3.P-2f K-6b
4.P-2e P-3d
5.Bx2b+ Sx2b
6.B*6e B*7d
(diagram 2)

Against 2...P-9d , Sente advanced the game with same moves as without 2.P-9f P-9d .
Gote also drops his Bishop . How do the 9th Pawns give influence in a game ?

Here shows a line of Bishop promotion . Sente can select Bishop exchange line .

(diagram 3)

after diagram 2
7.Bx4c+ Bx4g+
8.P-9e Px9e
9.P*9b Lx9b
10.+Bx3b Gx3b
11.R*9a
(diagram 3)

9th file Pawns causes Sente's attack in 9th file .

This is very rough game ! So if you don't like such a game , you should play 2...K-6b instead of 2...P-9d .

Niteme San-Ni Hi senpou , part 2.

2009-05-03T13:25:00.000+09:00

Shogi Opening traps : Niteme San-Ni Hi senpou , part 2.

(diagram 1)

1.P-7f R-3b
2.P-2f K-6b
3.P-2e P-3d
(diagram 1)

In this time , Sente tries to make a promoted Bishop with B*6e after Bishop exchange , because Sente can't break Gote's 2nd file .
(see former contents ; Niteme San-Ni Hi senpou , part 1. )

(diagram 2)

after diagram 1
4.Bx2b+ Sx2b
5.B*6e
(diagram 2)

In the diagram 2 Gote can't protect both 8c and 4c Pawns , and Sente can promote the Bishop . So Sente seemes to get advantage . How Gote should play ?

(diagram 3)

after diagram 2
5...B*7d
(diagram 3)

Gote drops a Bishop , he protects 8c file and he also aims to make promote his Bishop in 4th file with Bx4g+ .

Sente can select one of 2 lines ;
(1) Sente exchanges the Bishops again with Bx7d .
(2)Sente makes promoted Bishop with Bx4c+ .

Both lines have difficult variations .

Niteme San-Ni Hi senpou , part 1.

2009-05-02T11:54:00.006+09:00

Shogi Opening traps : Niteme San-Ni Hi senpou , part 1.

1.P-7f R-3b
(diagram 1)

Gote's 1st move 1...R-3b seems to dangerous move , because Sente feels 2c square is easy to break . If Sente directly aims to break 2nd file with P-2f , how the game advances ?

after diagram 1
2.P-2f K-6b
3.P-2e P-3d
(diagram 2)

Against Sente's advancing 2nd file Pawn , Gote opens Bishop line with 3...P-3d after 2...K-6b .

In the diagram 2 , Gote's 2nd file still seems to easy to break . If Sente pushes P-2d , how Gote plays ?

after diagram 2
4.P-2d Px2d
5.Rx2d Bx8h+
6.Sx8h B*3c
7.R-2h P*2f
(diagram 3)

Against Sente's 2nd file Pawns exchange , Gote exchanges the Bishops and immedialy drops his Bishop on 3c . This Bishop drop is forkinf 2d Rook and 8h Silver . To defend both Rook and Silver , Sente must backs his Rook to 2h . Gote drops a Pawn with 7...P*2f . Sente can't capture this Pawn , because 8h Silver is protected by the Rook's power .

This is because Sente can't break Gote's 2nd file .

Haya ISHIDA part 1.

2009-05-02T00:04:00.008+09:00

Shogi opening trap : Haya ISHIDA , part 1.

(diagram 1)

1.P-7f P-3d
2.P-7e K-4b
(diagram 1)

Gote moves up his King with K-4b just after Sente shows the attitude he wants Haya ISHIDA . The K-4b has a mean to disturb Sente's Haya ISHIDA . If Sente still seletcts Haya ISHIDA , how Gote plays ?

(diagram 2)

after diagram 1
3.R-7h Bx8h+
4.Sx8h B*4e
(diagram 2)

Gote exchanges the Bishops and immediately drops the Bishop with 4...B*4e . In many cases , Sente protect 6g Pawn . One example of lines after diagram 2 is shown below .

(diagram 3)

5.G-6h Bx2g+
6.B*5e N-3c
7.P-7d Px7d
8.Rx7d P*7c
9.Rx3d G-3b
(diagram 3)

The position of diagram 3 is still difficult , but most Sente players prefers quiet lines . So in many cases , Sente players push 3.P-6f instead of 3.R-7h .

MASUDA ryu Mukai Bisha , part 1.

2009-04-25T10:44:00.004+09:00

Shogi opening trap : MASUDA ryu Mukai Bisha , part 1.

(diagram 1)

1.P-7f P-8d
2.P-5f P-8e
3.B-7g P-5d
4.R-8h S-6b
5.S-6h P-3d
6.K-4h
(diagram 1)

The line shown above seems to be very natural . But it includes very dangerous variations . In case , Gote selects additional bad move , Sente can get win advantage .

(diagram 2)

6... K-4b?
7.P-8f Px8f?
8.Bx8f K-3b
9. Bx3i+ Gx3a
10. Rx8b+
(diagram 2)

In diagram 2 , Sente gets a Rook and a Silver in hand instead of a Bishop . And he has succesfully promoted his Rook already . Then Sente gets a win advantage .

This line is very famous among advanced players .

Gokigen Nakabisha . part 2.

2009-02-11T23:23:00.001+09:00

Shogi Opening Traps ; Gokigen Nakabisha . part 2.

(diagram 1)

1.P-7f P-3d
2.P-2f P-5d
3.P-2e R-5b
4.G-7h P-5e
5.P-2d Px2d
6.Rx2d P-5f
7.Px5f Rx5f
8.K-6i
(diagram 1)

In the diagram 1 , you may think Gote can promote his Rook with 8...R-5g+ . But it is a bad move , why ?

(diagram 2)

8...R-5g+??
9. Rx2b+ Sx2b
10. B*2d! K-6b
11. Bx5g
(diagram 2)

In the diagram 2 , Sente got one more Bishop , and have a greate advantage .

Yonteme San-San Kaku , part 2

2008-12-06T13:39:00.006+09:00

Shogi Opening Traps ; Yonteme San-San Kaku sepou . part 2.

The diagram 1 is a variation of "Yonteme San-San Kaku senpou" .

1. P-7f P-3d
2. P-2f B-3c
3. Bx3c+ Nx3c
4. G-7h
(diagram 1)

The move 4.K-6h prevents Gote's "Oni goroshi Mukai Bisha" ; 4...R-2b .
If Gote moves 4...R-2b Sente can get advantage by following moves .

(diagram 2)

4...R-2b
5. B*6e N-4e
6. S-4h B*5e
7. N-7g
(diagram 2)

In the diagram 2 , Sente have got advantages .

Gote can not promote his Bishop .
It is difficult for Gote to protect his Knight at 4e .
Gote can not prevent Sente's Bishop promotion in both 8c and 4c .

If Sente moves 4.P-2e instead of 4.K-6h , Gote can get advantage by same moves .

In the diagram 1 , Gote should move G-3b , R-4b , B*6e or B*4d .

Hayakkuri Gin in Ittezon Kakukawari ; part 2.

2008-11-22T22:45:00.000+09:00

Shogi Opening traps;

Hayakuri Gin in Ittezon Kakukawari ; part 2.

(diagram 1)

1.P-7f P-3d
2.P-2f G-3b
3.P-2e Bx8h+
4.Sx8h S-2b
5.S-3h S-3c
6.P-3f S-6b
7.S-3g P-6d
8.S-4f S-6c
9.S-7g S-5d
10.K-6h P-8d
11.G-7h P-8e
(diagram 1)

In the diagram 1 , Sente already has difficulty to attack Gote's camp or advanced his own camp . If Sente don't start attacking , Gote will push his Pawn ; 4d --> 4e , and Sente must back his Silver 3g .

Then Sente start attacking with P-3e , and game will advance like following moves .

(diagram 2)

12. P-3e Px3e
13. Sx3e P-8f!
14. Px8f P*8e!
15. Px8e Rx8e
(diagram 2)

In diagram 2 , Gote gets a fork on 3e Silver and 8i Knight . Sente can't protect both piecies and Sente will get bad position .

Sente can avoid this fork by 15.P-2d instead of 15.Px8e . But in this line , Sente's camp will advance bad formation P-8h . I will show one example moves below , and Gote will get advantage .

(diagram 3)

12. P-3e Px3e
13. Sx3e P-8f!
14. Px8f P*8e!
15. P-2d Px2d
16. Sx2d Sx2d
17. Rx2d P*2c
18. R-2h Px8f
19. P*8d B*5e
20. S*4f B-3c
21. N-3g Rx8d
22. P*8h S*8g
(diagram 3)

Hayakuri Gin in Ittezon Kakukawari ; part. 1

2008-11-22T13:01:00.008+09:00

Shogi Opening traps;

Hayakuri Gin in Ittezon Kakukawari ; part 1.

(diagram 1)

1.P-7f P-3d
2.P-2f G-3b
3.P-2e Bx8h+
4.Sx8h S-2b
5.S-3h S-3c
6.P-3f S-6b
7.S-3g P-6d
8.S-4f S-6c
9.S-7g S-5d
(diagram 1)

In the diagram 1 , Sente has made "Hayakuri Gin" formation ; S-4f , but if he wants to start attacking with P-3e , he must move K-6h or P-1f before attacking . Why he needs such a move .

If he starts attacking 10.P-3e , the game will advance like following moves .

(diagram 2)

10. P-3e? Px3e
11. Sx3e P*3d
12. P-2d Px2d
13. Sx2d Sx2d
14. Rx2d B*1e
(diagram 2)

Then Gote gets a fork on King and Rook . In the diagram 2 , Sente has a lost position .
This is because , Sente must move K-6h or P-1f . By these moves , Sente can avoid this line .

(diagram 3)

10. P-3e? Px3e
11. Sx3e P*3d
12. S-4f P-4d
(diagram 3)

In addition to shown above , Sente can avoid this fork on King and Rook by 12.S-4f . But we think this line isn't good . Because Sente has started attacking once , but he gets no effective result but one Pawn in hand . And Gote will get better position with "Koshikakegin" formation . Sente can't attack any more .

Gokigen Nakabisha . part 1.

2008-10-22T10:40:00.004+09:00

Shogi Opening Traps ; Gokigen Nakabisha . part 1.

(diagram 1)

1. P-7f P-3d
2. K-6h
(diagram 1)

Sente's second move K-6h disturbes Gote's "Gokigen Nakabisha " . If Gote still tries to select "Gokigen Nakabisha" with P-5d , the following moves will give Sente an advantage .

(diagram 2)

2...P-5d?
3. Bx2b+! Rx2b
4. B*5c S-4b
5. B-8f+
(diagram 2)

In the diagram 2 , Sente has made a promoted Bishop . The difference between Sente's "promoted Bishop" and Gote's Bishop in hand gives Sente an advantage .

If Gote selects 3...Sx2b instead of 3...Rx2b , Sente will also get advantage in moves like following .

(1)
2...P-5d?
3. Bx2b+! Sx2b
4. B*5c R-5b
5. B-8f+

or

(2)
2...P-5d?
3. Bx2b+! Sx2b
4. B*5c B*4d
5. Bx4d+ Px4d
6. B*4c

Yonteme San-San Kaku , part 1

2008-10-09T10:54:00.007+09:00

Shogi Opening Traps ; Yonteme San-San Kaku sepou . part 1.

The diagram 1 is a variation of "Yonteme San-San Kaku senpou" .

(diagram 1)

1. P-7f P-3d
2. P-2f B-3c
3. Bx3c+ Nx3c
4. G-7h
(diagram 1)

The move 4.G-7h prevents Gote's "Oni goroshi Mukai Bisha" ; 4...R-2b .
If Gote moves 4...R-2b Sente can get advantage by following moves .

(diagram 2)

4...R-2b
5. B*6e N-4e
6. S-4h B*5e
7. S-8h
(diagram 2)

In the diagram 2 , Sente have got advantages .

Gote can not promote his Bishop
It is difficult for Gote to protect his Knight at 4e
Gote can not prevent Sente's Bishop promotion in both 8c and 4c

If Sente moves P-2e instead of 4.G-7h , Gote can get advantage by same moves .

In the diagram 1 , Gote should move G-3b or R-4b .

Aigakari , part 1.

2008-05-23T22:21:00.009+09:00

Shogi Opening trap; Aigakari part 1.

(diagram 1)

" Aigakari " opening starts with both player's pushing Rook's Pawn .

1. P-2f P-8d
2. P-2e P-8e
(diagram 　1)

When a beginner player sees diagram 1 as black , he might think white's Bishop's head (2c square ) is very weak and easily breakable .

But almost all advanced players move "3. G-7h " .
Why they don't move " 3. P-2c " ?

(diagram 2)

3. P-2d? Px2d
4. Rx2d P-8f
5. Px8f P*8g
6. P*2c Px8h+
7. Sx8h B*3e
8. R-2h Bx5g+
9. Px2b+ Rx2b
10. P*2c R-1b
11. B*2b P*2d
12. Bx1a+ Rx1a
13. Lx2g B*4e
14. Lx2d P*2g

After diagram 1 , Gote will get a great advantage with moves shown above .
There are some variations in the moves .

(1)5.P*2c instead of Px8f
5. P*2c Px8g+
6. Px2b+ Sx2b
Gote will get advantage .

(2)8.Px2b+ instead of 8.R-2h
8. Px2b+?? Bx2d
Gote gets a great advantage .

(3)9...Sx2b instead of 9...Rx2b
9...Sx2b ??
10. B*4e R-6b
11. P*5b!!
Sente gets a great advantage .