Arrange the Greek letters in the grid by dragging and dropping them, making sure that no letter is repeated in any row, column, or main diagonal. This game is updated 4 times a day: 09:00, 13:00, 17:00, and 21:00.
The Greek letters present in this game are: Δ (Delta), Θ (Theta), Λ (Lambda), Ξ (Csi), Π (Pi), Σ (Sigma), Φ (Phi), Ψ (Psi) and Ω (Omega).
This logic game was originally created by Leonid Mochalov.