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Frosted Board

Puzzle #21: Five in a Row

  • DifficultyMedium
  • To moveDark
  • TaskWin in 3
  • Main line5 half-moves

Dark to move. 16 stones are on the board, 8 dark and 8 light.

Make five in a line within 3 moves. Every move of the solution is a four, so the opponent's answers are forced.

What the position is about

  • chain of fours — Each move of the solution makes a four, so every reply is forced.
  • open four — The final shape is four in a row with both ends free, which cannot be blocked.
  • forcing sequence — The solution is a series of threats, each one leaving the defence a single answer.

Finding the way in

Look for a four that forces a block in a useful place; the next four should land next to it and create two threats.

Take your time. There is no clock on the result, and a wrong move is simply taken back so you can look again.

Show the first move

Start with h11. Played out against the stiffest resistance, the whole line goes: h11 d7 g11 d11 j11.

Solve it and the next puzzle of the same game is one tap away. Your solved puzzles are ticked in the list, in this browser only.