PlatinumDragon / Boards that have tengen as best starting move

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5x5 Board.

  • Play tengen gives opponent five choices (1,1), (2,1), (2,2), (3,1) and (3,2).
  • All five choices cannot lead to life.
  • Tengen influence the entire board.
[Diagram]

5x5 diagram

Square are influence. No space for territory, White cannot live.


7x7 Board.

  • Tengen (4,4) influence nearly all of the board.
  • Three stones can influence the entire board.
[Diagram]

7x7 diagram

There is enough space for territory in corner. White can live in corner.


9x9 Board.

  • Tengen is 1 step jump from third line.
  • The board is like 5 5x5 boards.
  • Board is like having two halves.
  • Four stones can influence the entire board.
  • No Strategy, for pure tactics development.
  • Added as a standard board size because of its no strategy element.
[Diagram]

9x9 diagram


[Diagram]

9x9 diagram

Notice that the 9x9 board is like 5 5x5 boards.


11x11 Board.

  • Influence from tengen is to 4th line.
  • Needs 3rd line stones to help, but 2 stone jump is weak.
  • Corners begin differentiate.
[Diagram]

11x11 diagram

white+circle at 3-3 may not be a good move, but it can totally take away the corner.


13x13 Board.

  • Strategy Can be use, but cannot develop.
  • Full Tactics development.
  • Corners differentiate completely.
  • Tengen is weak, corner star points are stronger.
  • Eight stones can influence the entire board.
  • Like 5 7x7 boards overlapping.
[Diagram]

13x13 diagram


[Diagram]

13x13 diagram

Notice That the 13x13 board is like 5 7x7 boards.


15x15 Board.

  • Strategy begins to develop here.
  • Corners and Sides begin to differentiate.
  • Star points emphasis more.

17x17 Board.

  • More Strategy development.
  • Corners and Sides are still crowded.
  • Corner star points are near perfect choice.

19x19 Board.

  • Full Strategy development.
  • Complete Corners and Sides differentiation.
  • Corner starpoints are near perfect choice.
  • Like 9 7x7 boards with overlapping edges.
[Diagram]

19x19 diagram

Notice that the 19x19 board is like 9 7x7 boards.


21x21 Board.

  • Tenuki the first 30 to 40 stones.
  • The 4th line is territory not the third line.
  • The 5th line is influence not the fourth line.

23x23 Board.

  • Tenuki the first 40 to 50 stones.
  • The 4th line is territory not the third line.
  • The 5th line is influence not the fourth line.

25x25 Board.

  • Tenuki the first 50 to 60 stones.
  • The 4th line is territory not the third line.
  • The 5th line is influence not the fourth line.

27x27 Board.

  • Tenuki the first 60 to 70 stones.
  • The 4th line is territory not the third line.
  • The 5th line is influence not the fourth line.

The trend here is to tenuki 10 more stones for every size up.

Board Ranges.

  • First Line Territory: 1 to 6.
  • Second Line Territory: 7 to 13.
  • Third Line Territory: 14 to 20.
  • Fourth Line Territory: 21 to 27.
  • Fifth Line Territory: 28 to 34.
  • Sixth Line Territory: 35 to 40.
  • Seventh Line Territory: 41 to 46.
  • Eighth Line Territory: 47 to 53.
  • Ninth Line Territory: 54 to 60.

The First Line Territory are too small, and the game is about influence. The Second Line Territory is not really a valid territory line, as the second line is difficult. This is more about tactics with equal territory and influence. The higher ups are more toward territory development first but by using tenuki moves to get sente in most subareas.

Most standard Board Sizes are at the top of each "Line Territory".

5x5 or 6x6 for first. This is for capture go.

13x13 for second. This is for tactics.

19x19 for third. This is for strategy.

Becaues 13x13 is large enough for strategy to occur, 9x9 is added. 9x9 is small enough that strategic moves cannot be played.


This is a copy of the living page "PlatinumDragon / Boards that have tengen as best starting move" at Sensei's Library.
(OC) 2009 the Authors, published under the OpenContent License V1.0.
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