okkaystudio
Gomoku lessons · Intermediate · Step 5
Four-Three (4-3)
Making a four and an open three with a single move is called a four-three (4-3). Your opponent has to block the four, so they can't stop the three, and it becomes an open four next move. It's the most classic winning formula in Gomoku.
Puzzle 1
Where can you make a four and an open three at the same time? (Black to move)
Show answer and explanation
The green circle marks the answer. This makes a closed four horizontally and an open three vertically at once. When White blocks the four, the vertical line becomes an open four.
Puzzle 2
Find where the diagonal and the horizontal line meet. (Black to move)
Show answer and explanation
The green circle marks the answer. The diagonal is a three that White has blocked on one side, so it becomes a four, and the horizontal line becomes an open three.