Picking Blackcurrants
(Published on 27. September 2025, 08:00 by Kaktuslav)
Link to SudokuPad: https://sudokupad.app/xpmmigjjdy
Rules: Normal sudoku rules apply.
N-E-SW path: Draw a directed path through the centers of some cells in the grid, starting in one blue circle and ending in the other. The path may move only orthogonally north (↑), orthogonally east (→), or diagonally southwest (↙), and it may not visit any cell more than once. The path must function both as an entropic line and as a region sum line. Every black dot in the grid must be crossed by the path. No cell adjacent to a white dot may be visited by the path.
Entropic line: Every set of three consecutive cells along the line must contain one low digit (1,2,3), one middle digit (4,5,6), and one high digit (7,8,9).
Region sum line: Box borders divide the line into segments, and all such segments must have the same sum.
Kropki dots: A white dot between two digits means they must be consecutive. A black dot between two digits means they must be in a ratio of 2. One of the dots contains an inequality sign pointing to the smaller digit.
Solution code: All digits NOT ON the path in Row 4 (left to right) followed by all digits ON the path in Row 5 (left to right)
Last changed on -
Solved by Pumpkin, Piff, TripleABattery, gdc, clock, Fool on Hill, MixedMathialArts, oskode, Snookerfan, abysszealot, v8nagrom, GoldenGod, annnz, SudokuHero, QuiltyAsCharged, mir85, mse326, steeto, jkuo7, ... konklone, Adacho, rpearl, Cascade, spookyripper, OGRussHood, BlueShifted, kasperd, sorryimLate, Daniblitz, sehringdipity, mew_rocks, Uhu, dynastinae, madhupt, BlazingSnow, koXx, Exigus, h5663454
Comments
on 26. October 2025, 19:13 by Adacho
Absolutely brilliant! Love how these specific rules interact amazingly with each other. Very satisfying to solve as well.
on 26. October 2025, 02:40 by konklone
I'm very glad I stuck with this one. Reminds me of the good old days 2 years ago. :)
on 9. October 2025, 23:04 by Fool on Hill
Another brilliancy - not easy, but deserves a rating. The constraints look insufficient, but are just enough ...
on 4. October 2025, 15:57 by Snookerfan
Fabulous puzzle! I found it very hard to plot the path and to find the correct total of te region sum line, but there was just enough information to find it. Very rewarding. Thank you
on 2. October 2025, 09:48 by oskode
Phenomenal puzzle!
on 30. September 2025, 23:05 by MixedMathialArts
This one makes the GOATed puzzle list. A really good one, on par with blue line and RGB. A reason to be proud.