The Game of Go (annotated)/Chapter VIII

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VIII

PROBLEMS

After the student has become familiar with the rules and the methods of play, and perhaps has played a few games either with another beginner or with a Japanese master, the impression left on the mind is likely to be that the game is too vague, and that there is too wide a latitude of choice of positions where stones may be placed. This impression might be corrected by the study of illustrative games, or of “Joseki” and end positions, but such a course is rather dry and uninteresting, and, in the opinion of the author, by far the best way of attaining a correct idea of the game is by means of problems.

Many of us are familiar with Chess problems, and I think Chess players will agree that they benefit the student of Chess very little, because the assumed positions are not such as arise frequently in actual play. The opposite is the case in regard to Go problems. These are for the most part taken from actual games, and the typical problem is a situation that is quite likely to arise in actual play, and some of them are positions that occur again and again.

If the student of the game will set up these positions from the text and attempt to solve them, preferably with the aid and encouragement of some friend, he will find that the task is an interesting one, and he will be impressed by the great accuracy which is necessary in attacking and defending difficult positions.

With the knowledge obtained in this way, he will be able to judge with far greater skill what to do when a position is threatened in actual play. He will be able to distinguish whether the danger is real, and whether it is, therefore, necessary to reply to his adversary's attack, or whether he can afford to ignore it and assume the "Sente" in some other part of the board. He will also be able to perceive when an adversary's group is vulnerable so that it will be profitable to attack it.

The collection of problems which I have given in this book are rearranged from Korschelt's work, and they were in turn taken by him from a Japanese treatise called "Go Kiyo Shiyu Miyo." Necessarily the collection here given is a very small one, but if any reader of this book becomes so much interested in the game that he desires to study other examples, he will doubtless find some Japanese acquaintance who can supply him with further material, as the Japanese literature of the game contains large collections.

The most important kind of problems are those in which the question is how to kill an adversary's group, or how to save one's own group when threatened. It is also often very important to know how a connection between two groups can be forced.

For greater clearness these problems are arranged under seven heads; to wit,

1. Saving Threatened Groups.

2. Killing Groups.

3. Playing for "Ko."

The advantage gained by this operation is not apparent in the group itself, but depends upon which player has the larger threatened group elsewhere.

4. Reciprocal Attacks or "Semeai."

This is a combination of the first two kinds of problems, and it only differs from them in that both players have comparatively strong groups which are so intertwined that both cannot live, and the question is, which can kill the other first.

5. Connecting Groups.

The problem here is to force a connection between a small group having insufficient "Me" and some larger group.

6. "Oi otoshi."

This really means a "robber's attack." It arises where a group is apparently engulfed by the opponent, and when, by adding further stones to it which the opponent must take, the threatened player can force his opponent to abandon a part of his surrounding chain in order not to sustain greater losses. The attack is so sudden and unexpected that the Japanese compare it to the methods of a highwayman. It is an example of the finest play in the game.

7. Cutting.

This is another method of escape, and the problem is to cut off and kill part of the adversary's surrounding chain.


In the following examples the side having the first move is given in italics.


I. Saving Threatened Groups

  1. (Plate 40, A) White, Q 18, R 18, S 16, 17, 18.
Black, O 17, P 18, Q 17, R 15, 17, S 15.
  2. (Plate 40, B) White, O 3, Q 3, 4, R 3, 5, S 5.
Black, R 2, 4, S 3, 4.
  3. (Plate 40, C) White, A 14, B 11, 13, C 13, 14, 15, 17, D 17, 18, E 16, F 17.
Black, A 13, B 14, 15, 17, 18, C 16, 18.
  4. (Plate 40, D) White, B 3, C 3, D 2, E 2.
Black, B 4, C 4, D 3, E 3, F 2, G 3.
  5. White, B 5, C 4, D 5, E 2, 3, 4, G 2.
Black, B 3, 4, D 2, 3, E 1.
  6. White, B 12, 13, 15, 16, C 13, 15, D 13, 14.
Black, A 16, B 11, 17, C 10, 12, 16, D 12, 15, 16, E 13, 14.
  7. White, M 16, 17, N 16, O 15, 17, P 14, 17, Q 18, R 14, S 15.
Black, N 17, O 16, P 16, Q 16, R 16, S 16, 18.
  8. White, O 1, P 2, Q 2, 3, R 3, S 3, 4.
Black, N 2, O 2, P 1, 3, 4, Q 4, R 4, 6, S 5, T 4.
  9. White, A 4, B 5, 6, C 4, D 5, E 2, 3, 4.
Black, A 5, B 3, 4, C 3, D 2, 3.
10. White, B 15, 16, C 17, 18, D 18.
Black, A 15, B 14, C 14, 15, 16, D 17, E 17, 18.
11. White, L 18, M 16, 17, N 14, 18, O 13, 19, P 18, Q 12, 13, 17, 18, R 12, 14, 18, S 14, 17, 19.
Black, N 17, O 15, 17, 18, P 14, 17, Q 14, 15, 16, R 13, 16, 17, S 13, 18.
12. White, Q 3, R 2, 3, S 3.
Black, P 2, 3, 5, Q 2, 4, R 5, 7.
13. White, B 2, C 3, D 1, 3, E 2.
Black, B 4, C 5, D 4, E 3, 4, F 1, 2, G 3.
14. White, A 16, B 15, C 15, 16, D 17, E 17, F 18, G 18.
Black, B 16, 17, C 17, D 18, E 18, F 19.
15. White, Q 15, R 14, 15, 16, S 17.
Black, P 15, 17, Q 13, 14, 16, R 11, 12, 17, 18.
16. White, R 3, 4, 5, S 2.
Black, O 3, P 3, Q 4, 6, R 6, S 6, T 3.
17. White, B 4, C 3, 4, 5, E 4, F 2, 3, H 2.
Black, B 3, C 2, D 3, E 2, F 1.
18. White, C 13, 15, 16, 17, E 14, 15, 16.
Black, B 14, 15, C 12, 14, D 13, 17, E 12, 17, F 15, 16, G 13.
19. White, M 17, N 18, O 17, 19, P 15, 17, R 14, 16, S 16.
Black, O 18, P 18, Q 16, 17, R 17, S 17.
20. White, P 2, 3, 6, Q 2, 4, R 2, 4, 6, 7.
Black, Q 3, R 1,3, 9, S 2, 4, 5.
Saving problem 5  
Saving problem 6  
Saving problem 7  
Saving problem 8  
Saving problem 9  
Saving problem 10  
Saving problem 11  
Saving problem 12  
Saving problem 13  
Saving problem 14  
Saving problem 15  
Saving problem 16  
Saving problem 17  
Saving problem 18  
Saving problem 19  
Saving problem 20  
Smith (1908) The Game of Go Plate 40.png

Plate 40

Saving problem 21  
Saving problem 22  
Saving problem 23  
Saving problem 24  
21. White, B 13, 14, 16, C 13, D 13, 14, 15, 18, E 16, 17.
Black, B 15, C 14, 15, 17, 18, D 16.
22. White, C 7, D 3, 5, 6, E 2, 3, 7, F 5.
Black, C 2, 4, 5, 6, 9, 10, D 2, E 8, F 2, 8, G 3, 5, 6, J 3.
23. White, O 2, 3, 4, 6, Q 4, R 4, 6, S 5, T 4.
Black, P 2, 3, R 3, S 3, 4.
24. White, Q 17, R 16, 17, S 18.
Black, N 17, O 17, P 16, Q 16, R 15, S 16, 17.


II. Killing Groups

  1. (Plate 41, A) White, O 17, P 18, Q 14, 15, 16, 17, R 13, S 13, 14, 15.
Black, Q 18, R 14, 15, 16, 17, 18, S 16, T 15.
  2. (Plate 41, B) White, P 5, Q 3, R 2, 5, S 5, 6.
Black, O 2, P 3, 4, 6, Q 2, 5, R 6, 7, S 8.
  3. (Plate 41, C) White, B 15, 18, C 16, 17.
Black, B 14, C 14, D 15, 16, 17, 18.
  4. (Plate 41, D) White, B 4, C 3, 4, E 1, 3, F 2, 4, G 2.
Black, A 3, B 2, 3, C 2, D 2, E 2, F 1.
  5. White, B 4, C 4, D 3, E 3, F 2, G 3.
Black, A 3, B 3, C 2, D 2, E 2.
  6. White, B 16, C 10, D 13, 15, 16, 17.
Black, B 14, C 12, 15, D 18, E 12, F 14, 15, 17, G 17.
  7. White, P 17, 18, Q 15, 16, R 13, 15.
Black, Q 17, 18, R 16, S 16.
  8. White, Q 1, R 2, 3, 5, S 5.
Black, O 2, Q 2, 3, 4, 5, 6, R 7, S 7.
  9. White, B 5, C 5, 8, D 5, E 2, 4, F 2, 3, 4.
Black, B 4, C 4, D 2, 3, E 3.
10. White, B 15, C 15, 17, 18.
Black, B 14, C 12, 14, D 15, 16, 17, F 17.
11. White, M 16, O 15, 16, 18, P 18, Q 14, R 12, 15, 18, S 16.
Black, L 16, P 16, 17, Q 16, 18, S 17, 18.
12. White, Q 2, R 2, S 3, 4, 5.
Black, P 2, 3, Q 3, R 4, 5, 7, S 6.
13. White, B 4, C 4, 6, D 4, E 3, F 3, G 2, H 3.
Black, B 3, C 3, D 3, E 2, F 2.
Killing problem 5  
Killing problem 6  
Killing problem 7  
Killing problem 8  
Killing problem 9  
Killing problem 10  
Killing problem 11  
Killing problem 12  
Killing problem 13  
Smith (1908) The Game of Go Plate 41.png

Plate 41

Killing problem 14  
Killing problem 15  
Killing problem 16  
Killing problem 17  
Killing problem 18  
Killing problem 19  
14. White, C 17, 18, E 16, 17, F 15, G 16, H 16, 17, K 16.
Black, B 17, 18, C 16, D 14, 16, 17, E 13, 15, G 14, 15, 17, J 14, 15, K 17, L 16.
15. White, N 17, P 16, 17, 18, Q 15, R 13, 15, S 14.
Black, Q 16, 17, 18, R 16, S 15.
16. White, P 2, Q 2, R 3.
Black, N 3, O 3, Q 3, 4, R 5.
17. White, B 16, 17, C 17, D 18, 19.
Black, C 12, 14, 16, D 16, 17, E 18, F 17.
18. White, H 3, K 3, 4, M 3, N 4, O 2, P 3, 4, Q 6, R 5, S 1, 4.
Black, P 1, 2, Q 3, R 2, 3, S 3.
19. White, M 17, O 16, 17, P 15, R 13, 15, S 15, 16.
Black, P 16, Q 16, 18, R 16, S 17.


III. Playing for "Ko"

  1. (Plate 42, A) White, O 16, P 17, 18, Q 16, R 14, 16, S 15.
Black, Q 17, 18, R 17, S 16.
  2. (Plate 42, B) White, O 4, 5, P 2, 3, 6, R 2, 6, 7, S 3, 5.
Black, L 3, N 3, O 3, P 4, Q 4, R 4, 9, S 4, 7, T 4.
  3. (Plate 42, C) White, B 16, 17, C 18.
Black, C 13, 15, 16, 17, D 18, E 17.
  4. (Plate 42, D) White, B 4, C 4, D 4, E 3, 4, F 2, G 4.
Black, C 2, 3, D 3, E 2.
  5. White, B 4, C 4, D 3, E 3, F 2, 3.
Black, B 3, C 1, 3, D 2, E 2.
  6. White, C 15, 16, 17, D 18.
Black, B 14, C 12, 14, D 15, 16, 17, E 18, F 17.
  7. White, P 17, 18, Q 17, R 15, 16, S 15.
Black, Q 18, R 17, 19, S 16, 17.
  8. White, Q 3, R 3. S 4.
Black, O 3, P 3, Q 4, R 4, 6, S 5.
  9. White, B 5, C 4, 5, E 4, F 4, H 2, 4, 5, J 3.
Black, B 3, 4, D 3, E 3, F 3, G 3.
10. White, B 15, 16, C 17, 18, D 19.
Black, B 14, 18, C 14, 15, D 16, 18, E 18, F 16.
Ko problem 5  
Ko problem 6  
Ko problem 7  
Ko problem 8  
Ko problem 9  
Ko problem 10  
Smith (1908) The Game of Go Plate 42.png

Plate 42

Ko problem 11  
Ko problem 12  
Ko problem 13  
Ko problem 14  
Ko problem 15  
Ko problem 16  
11. White, N 17, O 18, P 16, 17, Q 16, R 16, S 16.
Black, P 18, Q 17, R 17, S 17.
12. White, P 2, Q 2, R 3, 4, S 2.
Black, M 3, O 3, P 3, Q 5, R 5, S 3, 4, T 2.
13. White, A 2, B 3, 4, C 5, D 4, 5, F 4, G 2, 3.
Black, B 2, C 3, 4, D 3, E 3, F 2.
14. White, C 15, 16, 17, D 16.
Black, C 14, D 14, 15, 17, 18, E 16, F 17.
15. White, N 17, O 18, P 16, 17, Q 15, R 15, S 16.
Black, P 18, Q 16, 17, S 17.
16. White, R 2, 4, S 3.
Black, O 3, P 4 , Q 2, 4, R 5, 6, S 4.


IV. Reciprocal Attacks (“Semeai”)

  1. (Plate 43, A) White, N 17, P 17, Q 17, R 17, S 18.
Black, Q 18, R 14, 16, 18, S 16, 17.
  2. (Plate 43, B) White, O 3, P 2, Q 2, R 3, S 3, 5.
Black, Q 3, 4, R 2, 6, S 2, 7.
  3. (Plate 43, C) White, B 15, 16, C 15, 17, 18, D 17, E 18.
Black, B 17, C 16, D 16, 18, E 16, 17, F 18.
  4. (Plate 43, D) White, B 2, 3, 4, C 5, D 3, 4, 6, F 3, G 2, 3.
Black, B 5, 6, C 2, 3, 4, 7, D 2, E 2, F 2.
  5. White, B 3, C 2, 3, 4, D 4, E 3, F 3, G 2, 3.
Black, A 3, 5, B 4, 6, C 5, D 2, 3, 5, E 2, 4, 5, F 2.
  6. White, B 14, 15, 16, 19, C 15, 17, 18, D 18, E 17, F 17.
Black, B 13, 17, 18, C 13, 14, 16, D 15, 16, 17, E 14.
  7. White, N 17, O 17, Q 16, 17, R 18, S 18.
Black, P 18, Q 15, 18, R 15, 17, S 17.
  8. White, P 2, 4, Q 2, 6, R 3, 7, S 3, 6.
Black, N 3, O 2, 3, P 3, Q 3, R 4, 5, S 4.
  9. White, A 4, B 5, C 5, 7, D 2, 3, 5, E 3, 4.
Black, B 3, 4, C 2, 4, D 4, 6, E 5, 6, F 2, 4, G 3.
10. White, B 13, 14, 15, C 15, 18, D 16, 17, 18.
Black, B 12, 16, C 12, 13, 14, 16, 17, D 15, E 15.
11. White, O 2, 4, P 2, 4, Q 2, 3, 5, R 5, 7, S 4.
Black, M 3, N 2, 3, O 3, P 3, Q 4, R 3, 4.
Semeai problem 5  
Semeai problem 6  
Semeai problem 7  
Semeai problem 8  
Semeai problem 9  
Semeai problem 10  
Semeai problem 11  
Smith (1908) The Game of Go Plate 43.png

Plate 43

Semeai problem 12 
12. White, Q 11, 12, 13, R 11, 14, 15, S 16, T 14.
Black, Q 14, 15, R 12, 13, 16, 17, 18, S 11, 13.


V. Connecting Groups

  1. (Plate 44, A) White, K 14, 16, 18, L 18, M 13, N 13, 15, O 16, P 14, 17.
Black, M 16, 18, N 14, 17, Q 14, 15, 16, R 17.
  2. (Plate 44, B) White, N 5, O 4, 6, P 4, Q 3, 8, R 3, 8, S 3, 4, 7, 9.
Black, N 6, P 5, 6, 8, 9, R 4, 6, 7, 10, 11, S 5.
  3. (Plate 44, C) White, C 11, 12, 13, 14, 18, D 14, 17, E 18, G 17.
Black, B 10, C 9, 16, 17, D 10, 13, 15, E 11, 14, F 13, 16.
  4. (Plate 44, D) White, C 2, 3, 5, 6, E 7, G 3, 5, H 3, 5.
Black, D 3, 5, E 5, F 3, 6, G 6, J 4, 7, K 3, 6.
  5. White, A 2, B 2, 5, C 6, D 3, E 5, 7, F 5, G 2, 3.
Black, C 1, 2, 3, 4, D 4, G 5, H 2, 3, 4.
  6. White, B 13, 17, C 13, 17, D 13, 16, 17, E 17, F 17.
Black, B 15, C 10, 14, 16, D 11, E 14, 16, F 12, 14.
  7. White, M 2, 3, P 2, 3, R 2, 3, 4, S 5, 6.
Black, N 4, P 4, Q 2, 3, 4, 6, R 5, S 2, 3.
  8. White, M 13, 15, N 11, O 10, 15, P 13, Q 9, 14, R 10, 15, S 12, 16.
Black, O 12, 17, P 12, Q 16, R 11, 12, 13, 17, S 13, 17.
  9. White, B 2, 3, C 2, 4, D 6, F 4, 7, G 3, 5, H 3, 5, J 6, K 5, L 4.
Black, C 3, D 2, 3, E 3, 5, F 3, G 4, J 4, 5, K 4, L 3, M 3.
10. White, C 12, 17, D 9, 14, 18, E 10, 12, 13, 17, F 17, G 15, H 12, 14.
Black, C 8, 9, 14, 15, 16, D 10, E 15, 16, F 13, 14.
11. White, H 17, J 17, K 17, N 15, O 15, 17, P 17.
Black, J 16, K 14, 16, M 14, 16, N 16, O 13, Q 14, 17, R 16.
12. White, Q 8, 9, R 3, 4, 5, 10, 11, 12, S 2.
Black, P 3, 5, 7, 8, 9, Q 2, 5, 10, R 2, 7, S 1.


VI. "Oi otoshi"

  1. (Plate 45, A) White, P 18, Q 15, 16, 17, R 17, 18, S 17.
Black, O 17, 18, P 14, 16, Q 14, R 14, 16, S 16, 18, T 17.
  2. (Plate 45, B) White, N 5, O 4, P 3, 4, 6, Q 2, R 2, 7, S 3, 4, 6, T 5.
Black, M 4, N 2, 4, O 3, P 1, 2, Q 3, 5, R 3, 5, S 5.

Connecting groups problem 5  
Connecting groups problem 6  
Connecting groups problem 7  
Connecting groups problem 8  
Connecting groups problem 9  
Connecting groups problem 10  
Connecting groups problem 11  
Connecting groups problem 12  
Smith (1908) The Game of Go Plate 44.png

Plate 44

Smith (1908) The Game of Go Plate 45.png

Plate 45

Oi otoshi problem 5  
Oi otoshi problem 6  
Oi otoshi problem 7  
Oi otoshi problem 8  
Oi otoshi problem 9  
Oi otoshi problem 10  
Oi otoshi problem 11  
Oi otoshi problem 12  
  3. (Plate 45, C) White, A 16, B 13, 15, 17, 18, C 14, 19, D 16, 17, 18, E 13, 16, F 16, G 14, 15.
Black, B 16, C 15, 16, 17, 18, D 15, E 15,   15, 17, G 16, 17.
 4. (Plate 45, D) White, B 3, C 1, 3, 4, 5, 6, D 2, E 3, F 2.
Black, A 3, B 2, 4, 5, 6, C 2, 7, D 7, E 4, 6, F 4, G 2, 3.
  5. White, A 3, B 4, C 4, D 3, 4, F 2, 3, 4.
Black, B 3, C 3, 5, 6, D 2, E 2, 6, F 1, G 2, 4, 5, H 3.
  6. White, A 18, B 15, 17, C 14, 18, D 14, 19, E 14, 18, F 15, 18, G 19, H 16, 17, 18.
Black, A 16, B 16, 18, C 16, D 15, 17, 18, E 17, F 17, G 17, 18.
  7. White, P 5, 6, Q 3, 4, 9, R 3, 9, S 4, 5, 7, 8, T 6.
Black, N 4, P 2, 3, 4, Q 5, R 4, 5, 6, 7, 8, S 6.
  8. White, Q 16, 17, 18, R 13, 14, 15, 16, 18, S 16.
Black, O 17, P 12, 15, 18, Q 13, 15, R 12, 17, S 13, 14, 15, 17, 18, T 16.
  9. White, A 3, 4, B 4, 6, C 2, 3, 5, D 1, 3, E 3, F 3, G 3, H 3, J 2, 3.
Black, B 1, 2, 3, C 1, 4, D 2, 4, E 2, 4, F 2, 5, G 2, H 2, 5, J 1, K 2, 3, 4.
10. White, A 9, 12, B 8, 10, 11, 13, 14, 16, 17, C 8, 15, D 9, 15, E 11, 13, 14.
Black, A 18, B 9, 12, 18, C 9, 10, 11, 12, 13, 14, 17, D 14, 17, E 15, 16.
11. White, H 17, J 15, 18, L 14, 15, M 14, N 15, 16, 17, O 17, 18, P 17, Q 17.
Black, K 17, L 16, M 15, 16, 18, N 14, 18, O 14, 19, P 18, Q 15, 18, R 16, 17.
12. White, O 4, 6, P 2, 3, 8, Q 9, R 4, 5, 6, 9, S 3, 4, 7, 9, T 7, 8.
Black, Q 3, 4, 5, 6, 7, R 3, 7, 8, S 2, 6, 8, T 2.


VII. Cutting

  1. (Plate 46, A) White, C 15, D 17, 18, E 15, 17, G 18, H 18, J 13, K 13, 14, 15, 16, 17, 18.
Black, E 18, F 12, 17, 18, G 13, 15, 17, H 12, J 11, 14, L 12, 16, 18, M 14, 16, N 18.
  2. (Plate 46, B) White, J 3, K 5, 6, L 3, 4, 7, P 3, 5, 7, O 2, 3, 9, R 6.
Black, L 5, 8, M 3, 8, N 3, 5, 7, O 3, 8, P 2.
  3. White, C 15, D 18, E 13, 1 5, 16, 17, H 18, J 12, 15, 17, K 13, 14, 15, 17.
Black, E 18, F 12, 13, 17, 18, G 15, 17, H 12, 13, J 11, 14, L 12, 16, 17, M 14.
Cutting problem 3 
Smith (1908) The Game of Go Plate 46.png

Plate 46

Cutting problem 4 

  4. White, H 5, 7, 9, 10, J 3, K 3, 5, 7, 9, L 2, 3, M 2, 9, O 4, 6, 7, 8, Q 3, R 3.
Black, G 5, 6, 7, 9, H 3, 4, 8, J 2, M 3, 5, 7, N 2, 3, 5, 7, P 2, Q 2.


SOLUTIONS TO PROBLEMS

I. Saving Threatened Groups

  1. T 19.
  2. T 2, S 1, T 4, Q 2, R 1.
  3. A 18, A 16, B 16.
  4. B 2, C 1, B 1, D 1, C 2.
  5. A 2, B 1, A 4 or A 2, A 4, B 1.
  6. C 17, C 18, D 17, E 17, B 18, D 18, A 18, B 19, A 12, A 14, B 14.
  7. O 18, N 18, Q 17, R 18, P 18, N 17, R 17, O 19, R 19, P 19, T 17 or O 18, P 18, R 18, or O 18, R 18, P 18.
  8. S 2, R 1, S 1.
  9. B 1, A 2, B 2.
10. A 17, B 19, B 18, A 14, C 19, A 16, A 19, B 17, B 16.
11. T 16, T 18, T 14 or T 16, S 12, T 18.
12. S 5, S 6, T 5.
13. C 1.
14. B 19.
15. S 18, S 19, S 13, T 18, S 15, T 17, T 14 or S 18, S 13, T 16.
16. S 5, T 5, T 4, S 4, T 2, T 6, Q 2, or S 5, T 5, T 4, S 4, T 2, Q 2, S 3, T 4, T 6, T 4, T 5, S 1, S 8.
17. A 3, B 1, B 2, E 3, A 1, A 2, C 1.
18. F 17, G 17, F 18, G 18, D 18, E 18, D 19, E 19, D 16, F 19, B 19, A 18, B 18, A 17, D 14, C 18, B 17, C 19, B 16, or F 17, G 17, F 18, G 18, D 18, E 18, D 19, E 19, D 16, F 19, B 19, C 18, B 18.
19. Q 15, Q 14, R 15, S 15, T 16, S 14, Q 19, T 17, S 18, N 19, R 19.
20. T 3, S 6, T 5, S 3, R 3.
21. A 16, A 17, A 15, B 18, B 19, B 17, A 18, A 19, C 19.
22. C 3, B 3, B 2, B 1, A 2, A 3, B 6, B 5, A 5, A 1, D 4, B 4, B 8, E 1, B 9.
Saving answer 1  
Saving answer 2  
Saving answer 3  
Saving answer 4  
Saving answer 5 first  
Saving answer 5 second  
Saving answer 6  
Saving answer 7 first  
Saving answer 7 second  
Saving answer 8  
Saving answer 9  
Saving answer 10  
Saving answer 11 first  
Saving answer 11 second  
Saving answer 12  
Saving answer 13  
Saving answer 14  
Saving answer 15 first  
Saving answer 15 second  
Saving answer 16 first  
Saving answer 16 second  
Saving answer 17  
Saving answer 18 first  
Saving answer 18 second  
Saving answer 19  
Saving answer 20  
Saving answer 21  
Saving answer 22  
Saving answer 23  
Saving answer 24  
23. S 1, T 2 , T 3, P 1, Q 1, Q 2, Q 3, R 1, R 2.
24. T 17, S 15, R 19.


II. Killing Groups

  1. Q 19, S 18, T 17, T 16, R 19, S 19, T 18, P 19, Q 19.
  2. S 2, Q 4, O 5, R 3, R 1, S 1, T 1, S 3, T 4, T 3, S 4, or S 2, R 1, R 4, R 3, Q 4, S 4, S 3.
  3. B 19, C 19, C 18, A 19, A 17.
  4. A 1, D 1, B 1.
  5. B 1, B 2, A 1, E 1, C 1.
  6. C 14, E 18, C 18, E 17, B 17, C 16, A 17, A 16, B 19 or C 14, C 18, E 18, B 18, C 16, C 17, A 16, A 15, A 17, B 15, C 19, B 19, A 18 or C 14, C 18, E 18, C 16, B 19, C 19, B 18, B 15, A 15.
  7. S 18, R 18, S 19, R 19, S 17, R 17, S 15.
  8. T 5, T 4, R 4, S 4, S 2, S 3, T 2.
  9. B 2, A 2, C 2, D 1, A 4, A 3, A 5, B 3, B 1, D 4, C 1 or B 2, B 3, C 2, D 1, A 2, B 1, A 4, A 3, D 4.
10. A 15, A 17, D 18, C 16, A 16, B 16, B 18 or A 15, B 16, D 18.
11. R 19, P 14, O 13, O 17, N 18, R 17, P 19.
12. T 2, T 5, T 3, Q 1, S 2, R 3, S 1, or T 2, T 5, T 3, S 2, Q 1, R 1, T 1.
13. F 1, D 1, A 3, A 2, B 1, C 1, G 1, B 2, D 2, C 2, E 1.
14. L 18, G 18, H 19, D 18, E 19 or L 18, D 18, F 18, G 18, F 17, E 18, H 18.
15. S 17, S 16, S 19, R 18, S 18, T 18, T 17, T 16, Q 19, R 19, P 19.
16. S 3, S 2, S 4, T 2, O 2, P 1, R 1, R 2, S 1.
17. B 19, B 18, E 19, C 18, B 15.
18. R 1, N 2, O 3, O 1, M 1, M 2, Q 1, L 2, N 1, L 1, N 1, M 1, T 3, T 2, T 4.
19. S 18, T 17, R 17, R 18, T 18, Q 17, T 16, R 17, P 18.


III. Playing for “Ko”

  1. S 18, T 16, T 17.
  2. P 1, O 2, T 2, T 3, Q 2, Q 3, R 3, S 2, R 1, T 1, N 2 or P 1, Q 1, Q 3, Q 2, S 2, T 2, S 1, R 3, O 2 or P 1, S 2, O 2, Q 1, S 6, S 8, R 5, R 8, Q 3, Q 2, T 3, T 2, S 1.
  3. A 18, C 19, B 19.
  4. D 1, B 2, B 3, A 3, A 2, A 1, B 1.
Killing answer 1  
Killing answer 2 first  
Killing answer 2 second  
Killing answer 3  
Killing answer 4  
Killing answer 5  
Killing answer 6 first  
Killing answer 6 second  
Killing answer 6 third  
Killing answer 7  
Killing answer 8  
Killing answer 9 first  
Killing answer 9 second  
Killing answer 10 first  
Killing answer 10 second  
Killing answer 1a  
Killing answer 12 first  
Killing answer 12 second  
Killing answer 13  
Killing answer 14 first  
Killing answer 14 second  
Killing answer 15  
Killing answer 16  
Killing answer 17  
Killing answer 18  
Killing answer 19  
Ko answer 1  
Ko answer 2 first  
Ko answer 2 second  
Ko answer 2 third  
Ko answer 3  
Ko answer 4  
Ko answer 5  
Ko answer 6  
Ko answer 7  
Ko answer 8  
Ko answer 9  
Ko answer 10  
Ko answer 11 first  
Ko answer 11 second  
Ko answer 11 third  
Ko answer 12  
Ko answer 13  
Ko answer 14  
Ko answer 15  
Ko answer 16  
  5. A 2, B 2, A 3, E 1, B 1.
  6. B 18, D 19, C 19.
  7. T 18, S 18, P 19, T 19, Q 19.
  8. S 2, T 4, T 3.
  9. C 3, C 2, B 1, A 2, E 1, F 1, F 2, E 2, G 1, A 4, C 1, D 1.
10. A 18, A 17, B 19.
11. P 19, T 17, T 18, S 19, R 19, R 18, Q 18 or P 19, R 19, S 19, S 18, T 19 or P 19, S 18, T 18, R 18, Q 18, R 19, S 19.
12. R 1, S 3, T 1.
13. C 1, D 2, A 1.
14. B 14, B 13, B 18, A 14, A 17, C 18, A 15, B 15, B 16.
15. R 18, R 16, S 19, T 18, T 17, P 19, Q 19.
16. Q 3, P 2, S 5.


IV. Reciprocal Attacks (“Semeai”)

  1. S 19.
  2. S 4, R 4, R 5, T 4, T 2, T 3, T 6.
  3. B 18, D 19, B 19, C 19, F 19.
  4. B 1.
  5. B 1, A 2, F 1.
  6. A 18.
  7. T 18, R 19, R 16, S 16, S 15, S 14, P 17.
  8. S 2, R 2, T 3.
  9. B 2, A 2, B 1, C 1, C 3, A 1, B 2, B 1, B 5.
10. A 16, A 17, B 18.
11. S 2, S 3, R 2, T 2, S 1.
12. T 12, T 11, S 10.


V. Connecting Groups

  1. O 15, N 16, M 15, O 14, O 17 or O 15, P 15, P 18, Q 18, P 16, O 17, O 18, Q 17, O 14.
  2. T 5, T 6, S 6, T 4, Q 5, Q 6, P 7, O 7, O 5, Q 7, R 5, Q 4, R 5, Q 5, T 3.
  3. E 15, E 16, B 17, B 16, D 16, C 15, A 16.
  4. F 5, E 6, E 2, F 2, E 4, D 4, E 3, D 2, D 1.
  5. F 4, E 4, F 3, E 3, F 2.
Semeai answer 1  
Semeai answer 2  
Semeai answer 3  
Semeai answer 4  
Semeai answer 5  
Semeai answer 6  
Semeai answer 7  
Semeai answer 8  
Semeai answer 9  
Semeai answer 10  
Semeai answer 11  
Semeai answer 12  
Connecting answer 1 first  
Connecting answer 1 second  
Connecting answer 2  
Connecting answer 3  
Connecting answer 4  
Connecting answer 5  
Connecting answer 6  
Connecting answer 7  
Connecting answer 8  
Connecting answer 9  
Connecting answer 10  
Connecting answer 11  
Connecting answer 12 first  
Connecting answer 12 second  
  6. A 15, A 16, B 16, A 14, C 15.
  7. Q 1, S 4, R 1, O 3, N 1, O 2, O 1.
  8. S 15, T 15, S 14, R 16, Q 15, R 14, P 14.
  9. J 2, H 2, H 1, J 3, K 3, H 4, G 1, F 2, F 1.
10. F 12, F 11, D 11, E 11, B 17, B 18, B 11, B 12, A 12, B 13, B 14, A 13, D 12.
11. L 16, M 15, M 18, L 18, M 17, L 17, L 19.
12. S 8, S 7, T 7, R 8, Q 7, S 9, R 9, R 6, T 8, Q 6, T 5 or S 8, S 7, T 7, R 8, Q 7, R 9, S 9, T 6, Q 6.


VI. "Oi otoshi"

  1. T 18, T 19, R 19.
  2. S 2, S 1, T 2, T 3, Q 1, T 1, S 2.
  3. B 19, A 19, A 17, A 15, E 18.
  4. A 2, A 1, A 4, A 5, D 1.
  5. C 2, B 2, B 1, C 1, A 2.
  6. B 19, C 19, C 17, A 19, B 18, B 19, A 17.
  7. S 3, S 2, R 2, T 3, Q 2, S 3, T 5, Q 8, T 7, S 9, S 1, Q 7, T 2.
  8. T 15, T 14, T 18, S 19, T 17, T 19, T 17, T 18, R 19, S 11, T 17, S 17.
  9. H 1, G 7, E 1, F 1, D 1.
10. B 15, A 15, A 13, A 14, A 17.
11. M 17, L 17, N 19, M 19, L 18, K 18, K 19, L 19, J 19.
12. T 3, S 5, T 4.


VII. Cutting

  1. G 16, F 16, G 14, F 14, F 15.
  2. N 6, M 6, O 6, M 7, M 4.
  3. G 16, F 16, G 14, H 15, F 15.
  4. K 6, J 6, L 6, J 8, F 4.
Oi otoshi answer 1  
Oi otoshi answer 2  
Oi otoshi answer 3  
Oi otoshi answer 4  
Oi otoshi answer 5  
Oi otoshi answer 6  
Oi otoshi answer 7  
Oi otoshi answer 8  
Oi otoshi answer 9  
Oi otoshi answer 10  
Oi otoshi answer 11  
Oi otoshi answer 12  
Cutting answer 1  
Cutting answer 2  
Cutting answer 3  
Cutting answer 4