Normal sudoku rules apply. The digits X and Y in a cage (reading left to right) form a pair of coordinates that point to Row X, Column Y (rXcY). The digit at rXcY is determined as follows: 1. If X or Y is in the entropic set: {1,2,3}, it represents the base-3 digit 0; {4,5,6}, it represents the base-3 digit 1; {7,8,9}, it represents the base-3 digit 2. 2. The entropic base-3 representations of X and Y now form a 2-digit base-3 number (reading left to right still). 3. Convert this number back to base-10, and place this digit at rXcY. No two cage coordinates point to the same cell. Digits do not repeat along the negative diagonal (blue line). Adjacent digits on a green line differ by at least 5. Adjacent digits on an orange line differ by at least 4. If a cage has a small number in the top left, the digits in that cage sum to that number. Digits either side of a white dot are consecutive. On a black dot, one digit is double the other. Digits either side of an X sum to 10. Digits either side of a V sum to 5. A digit on a grey square is even.