Chain Reaction Strategy

1. Learn to count critical mass

Every decision in a chain reaction game comes back to one question: how many atoms does this cell need before it explodes? Corners need 2, edges 3 and centre cells 4. Before each move, look at the cells around the one you want to play and compare: which of them will explode first?

2. Open in the corners

Corners are the strongest early squares. They explode after just 2 atoms and can only be attacked from two directions. A corner you own also makes a reliable trigger later: one more atom and it detonates into the edges.

Edges are the next best. Centre cells are slow to charge and exposed on all four sides, so avoid investing in them early.

3. Never prime next to a cell that is closer to exploding

The most common beginner mistake is loading a cell to one below its critical mass right beside an opponent cell that will explode sooner. On their next turn they explode into your cell, capture it and often trigger a chain through your whole group.

Rule of thumb: if a neighbouring enemy cell is closer to critical mass than yours, either explode first, wait, or play somewhere else.

4. Build chains of primed cells

Big cascades do not happen by accident. Strong players line up several cells that are each one atom away from exploding, all touching each other. When the first one goes, every primed cell in the line follows. Place the chain so the final explosions land in your opponent's territory.

5. Strike first and use tempo

Often the player who explodes first wins the exchange. If you and an opponent both have primed cells touching each other, the one who moves first takes everything. Count turns, and when a showdown is coming, make sure the trigger is yours.

6. Bait and sacrifice

Sometimes it pays to give up a cell. Leave a tempting target near your primed chain: if your opponent takes the bait and explodes into it, they may load your chain for you. Losing one atom to win twelve is a good trade.

7. Endgame: one move can flip everything

Late in the game the board is full of primed cells, so nearly every move starts a chain reaction. Slow down, trace each possible cascade to its end and look for the move that leaves your opponent with no atoms at all. The game ends the instant only one colour remains.

Practise these tips

• Play Vs Computer on Easy to practise counting, then move up to Medium and Hard.
• Use Match History to look back at the games you lost and find the move that started the losing cascade.
• Test your skills in ranked multiplayer.