Divide the grid into nine regions, each containing 9 orthogonally connected cells such that each cell is part of exactly one region. Fill the grid with digits 1-9 such that no digit repeats in any row, column or region. Thermo knots: From each big circle, draw straight horizontal or vertical thermometers in all possible directions, such that each thermo occupies at least two cells (including the circle). Digits along a thermo must increase, starting from the circle. Additionally, all cells along thermos must be part of the same region as their circle. If a thermo doesn't reach the edge of the grid, it MUST keep extending until it reaches the edge of its region, and the cell directly after the tip must be in a different region and must contain a SMALLER digit than the tip. Cells separated by a small white circle must be in DIFFERENT regions and contain consecutive digits.