1. Complete the artifact set "Queen's Gambit"
2. Collect 80 Mutantenspore in Seratos (collectibles around 11472, 4250)
3. Buy 8 Noisome Spore form Ezael (11480, 4040 )
4. Trade the pages form Queen's Gambit and the Noisome Spores for the Queens Gambit at Omi in Tempest Bay
5. Go to 4813, 8675 and activate the chesspiece
6. Place the queens on the board, so all of them can stand on it without taking each other out
Solution for the puzzle can be found here: http://forums.riftgame.com/game-discussions/adventures-telara/344992-queens-gambit-puzzle-location-solution-spoiler.html