Open Threes & Fours
📋 What it is
An open four is an unstoppable win; an open three forces the opponent to respond or lose next move.
🗣️ Coach says
Threat ranking: an open FOUR wins (two ways to make five). An open THREE forces a block. String threats together so each forced block sets up your next threat — that’s how you build to a win.
🧠 Memory hook
Open four = win. Open three = forcing move. Chain threats together.
😂 Giggle
Why did the Hex player love bridges?
Because a good connection is worth building!
😲 Whoa!
Skilled Gomoku players win by creating a "double three" — two open threes at once, an unblockable fork.
✅ Quick check: Why does an "open four" basically guarantee a win in Gomoku?
Say your answer out loud first — then reveal.
It threatens to make five at BOTH ends, so the opponent can block only one — you complete the other for the win.
Ranking threats (four > three) is how you plan winning sequences.
🧪 Try it! (2 minutes)
Set up an open three and show the move that turns it into a winning open four.