Duet

• 1Tap a cell once for an X (no gem here), twice for a gem, three times to clear it.
• 2Every colored zone needs exactly two gems. Rows and columns don't matter - only zones.
• 3No two gems may touch - not even diagonally. Placing a gem X's its neighbors automatically.
• 4Dark cells belong to no zone and never hold gems. Zones dim once they hold their two gems.
• 5Every board is solvable with pure logic - no guessing needed.

Tip: start with the smallest zones - they have the fewest places two gems can fit.