Jewels

Goal

Swap two neighbouring gems (horizontally or vertically) to form a line of at least three identical gems. The matched gems disappear, the ones above fall and new gems arrive: cascades are worth more and more. Reach the round’s target to move on to the next one.

Special gems

• Four in a row: a lightning gem, which clears a whole row or column.
• L or T shape: an explosive gem, which blows up the eight surrounding squares.
• Five in a row: a rainbow gem; swap it with a gem to clear every gem of that colour.
• Combinations: two special gems swapped together combine (a cross of lightning bolts, a big explosion, a rainbow that converts a whole colour, a double rainbow that empties the board).

Modes by level

• Relaxed, Normal and Infernal: a limited number of moves per round; the moves you have left earn a bonus.
• Fast and Intense: each round is timed; a cleared round adds time to the next one.
• When no swap is possible, the board is reshuffled automatically.

Controls

• Drag a gem towards its neighbour, or tap two gems one after the other.
• Keyboard: arrow keys to move the cursor, Space to grab the gem and then an arrow to swap it.
• The Hint button shows the best swap.

About the AI

The hint is not a simple match detector: the AI tries every legal swap, simulates the whole resolution (special gem effects, falls, cascades) over several random draws of the incoming gems, then picks the swap with the best expected return.