A play (or stone) creates thick shape if it leaves behind little or no aji. The opponent cannot capture, cut or play painful forcing moves against it.


Joseki Vol. 1 Fundamentals lists these types of thick shape moves:

  • thick extension (also called nobi)
    • single extension
    • bipolar extensions
    • multiple thick extensions from a crosscut
  • thick block
    • directional block
    • connecting block
    • cutting block
  • thick connection
    • thick string connection
    • thick diagonal connection (also called kosumi or diagonal connection)
      • thick diagonal pair
      • thick diagonal pair and jump
      • thick diagonal string connection
    • thick jump
      • standard shape
      • solidified standard shape
      • standard one-point jump
      • jump from a hanging connection
      • jump from a thick wall
  • thick cut protection
  • thick turn
    • attacking a single stone worth defending
    • leaning on a light stone
    • playing at the head of at least two stones
    • mutually blocking turns
    • successive turns
  • thick capture

ThickShapes last edited by xela on February 15, 2020 - 13:39
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