Sunday Stumper: Killer Sudoku by Prasanna Seshadri

This year, we started posting some extra difficult Sunday Stumpers, about once a month. These will be quite tough puzzles, but with a logical path to be found (and solution videos to help). This tenth Sunday Stumper is a challenging Killer Sudoku by Prasanna Seshadri.

Killer Sudoku by Prasanna Seshadri


or solve online (using our beta test of Penpa-Edit tools)

Theme: Y Go Extra?

Author/Opus: This is the 220th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Sudoku rules. Also, the sum of the digits in each cage must equal the value given in the upper-left corner of that cage. Digits cannot repeat inside a cage.

Difficulty: 5 stars

Time Standards (highlight to view): Grandmaster = 20:00, Master = 30:00, Expert = 1:00:00

Solution: PDF; a solution video is also available here.

Note: Follow this link for more Killer Sudoku and this link for classic Sudoku. More Killer Sudoku puzzles can be found in Killer Sudoku by Serkan Yürekli.

  • R says:

    Hi Prasanna Seshadri,
    You make me feel dumb.

  • sudgy says:

    I finally got around to solving this one. I really liked how ng gur ortvaavat lbh svaq n cerggl fvzcyr qrqhpgvba vaibyivat gur fhz bs gur gbc ebj, juvpu gura yrnqf lbh gb guvaxvat bs fhzf bs frireny ebjf/pbyhzaf, juvpu raqf hc orvat gur xrl gb fbyivat gur chmmyr. V srry yvxr univat gung uvag ng gur ortvaavat urycrq znxr gur chmmyr zhpu zber rawblnoyr.

  • sudgy says:

    …and finally looking at the solution video, you didn’t use what I mentioned too much :/ Nsgre hfvat gur fhz bs gur gbc ebj, V hfrq gur fhz bs gur sbhe evtugzbfg pbyhzaf, gura gur fhz bs gur obggbz gjb ebjf, gura gur fhz bs gur arkg guerr ebjf nobir gubfr gjb, gura gur fhz bs gur gbc sbhe ebjf. Lbh bayl hfrq gur fhz bs gur gbc ebj naq gur obggbz gjb ebjf.

    • Avatar photo drsudoku says:

      V’z abg gung fgebat ng nevguzrgvp (pbzcnerq gb bgure chmmyr / qrqhpgvba nernf) fb nqqvat hc ybgf bs ahzoref gb cbgragvnyyl trg gb bar-uhaqerq rvtugl be bar-uhaqerq guvegl-svir vf tbvat gb or zhpu ybjre ba zl yvfg guna gur gjb cynprf V chyyrq vg va.

      Pbatengf lbh jrer noyr gb svaq gubfr bofreingvbaf juvpu pna pregnvayl uryc trg gb gur svany nafjre.

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