YOU WILL LEARN
Intermediate: ask two questions with one move
- Recognize a 4-3 fork
- Separate forcing and preparatory moves
- Read the best defense first
- Combine defense with counterattack
0 / 50%
LESSONS
5 Lesson
01
A 4-3 fork ties the defense to one line
The opponent must answer the four, giving you time to grow the open three into the next winning threat.
Identify the reply to the four, then read the open-three conversion.
02
Find intersections of two lines
A point that contributes to horizontal and diagonal patterns can create two threats at once.
A strong candidate changes more than one line when placed.
03
Forcing moves preserve move order
Play a four first to predict the reply. A slow setup move may allow a counterattack or lose the key point.
When the opponent has only one reply, you are likely playing a forcing move.
04
Defend while creating your own three
Among several blocks, choose the one that connects your stones and can regain initiative.
Compare whether each block creates your next four.
05
Read in three-ply packets
Treat your move, their best reply and your next force as one unit. Reject candidates whose packet ends badly.
Assume the opponent chooses the most uncomfortable defense.
CHECKPOINT
Intermediate checkpoint
Against intermediate AI, find one 4-3 candidate without a hint. Explain the best defense before placing the move.