Logic Masters Deutschland e.V.

Checkerboard Speed Run

(Published on 23. July 2025, 05:00 by Will Power)

Normal Sudoku Rules apply. Red cells are greater than 5. DUTCH WHISPERS- Numbers on the red line are at least 4 apart from their neighbors on the line. XV PAIRS- Numbers with an X between them sum to 10. Not all possible X are given. KILLER CAGES- Numbers in cages sum to the number in the top left corner of the cage. No two-cell cage, with a sum of less than 6, can be made anywhere in this puzzle. Post your time on LMD in the comments, if you like. Bonus for less than 10 minutes. Double bonus for less than 8 Minutes.

F-Puzzles

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Solution code: Row 9.

Last changed on -

Solved by sfield, zonny, milxqueen, Nylimb, Kirra, DylanRay, jalebc, xrrx, weiken, hige, mjozska1985, Dermerlin, pms_headache, cannonmatthews, gafl, EFlatMinor, antiknight, x3y2z1, damo_89, Calesch, Kiwo, ... mid80, Waxwing, rhmayer, DK_48, jessisstressed, gruxli, tez, emilymw91, funky_chicken, capricorn, Scratch4998, Frisket, dovii, skyebee, isaiahrt, Ekla, ana_shadow, Jae, RyanDuarte56, ctigner
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Comments

yesterday, 21:42 by RyanDuarte56
05:00. Very fun puzzle, never used the last rule, but the red cells already made everything faster.

on 28. September 2025, 01:33 by capricorn
08:25

on 19. September 2025, 12:51 by annnjjjjjj
7.44 :)

on 19. September 2025, 12:49 by annnjjjjjj
7.44 :)

on 19. September 2025, 12:02 by annnjjjjjj
7.44 :)

on 9. September 2025, 17:53 by AngelaQ
5:10! Yay!

on 3. September 2025, 17:33 by samking
9:18

on 31. August 2025, 17:02 by Superdamicobros
10:18. No bonus points for me, but a great puzzle.

on 27. August 2025, 20:57 by KingIsulgard
3:58 What a fun puzzle!

on 27. August 2025, 15:15 by Rummmp
9:29

on 25. August 2025, 22:15 by Mona Mehus
17:01 - Very fun!

on 23. August 2025, 10:10 by lupinson
7:42

on 19. August 2025, 07:20 by AsgarArn
9:29

on 18. August 2025, 18:55 by 5381
3:06!

on 17. August 2025, 16:46 by zwy_200606
9:44

on 16. August 2025, 00:04 by m_and_m_toastie
7:27 for a beautiful double-bonus!

on 14. August 2025, 22:23 by Shentsi
9:35, it's hilarious reading the comment about Saint Peter

on 14. August 2025, 18:16 by jarsta
6:41

on 14. August 2025, 17:53 by jordanza
4:13

on 13. August 2025, 18:49 by Darion
6:02 - nice flow between red and white numbers!

on 13. August 2025, 13:53 by georgia.b
I can’t help colouring in… wastes a lot of time but just made it under 10 mins! 00:09:58

on 13. August 2025, 00:11 by Frank Puzzles
6:32 for me while trying to explain some logic. In the end, I just started filling in digits though. So I don't think my explanations were any good :p....

Last changed on 11. August 2025, 08:34

on 10. August 2025, 18:22 by Hieronymus
00:08:38. No double bonus for me ????. The "No two-cell cage, with a sum of less than 6, can be made anywhere in this puzzle."-rule is unnecessary.

@Hieronymus That rule helps with the break-in and allows the double bonus more easily. Sometimes, I ignore the urge to minimize clues. My intent is to make the puzzle fun for everyone, not just the experts. Peace to you. -Will Power

on 8. August 2025, 06:47 by Rüdiger
9:11 for me too

on 7. August 2025, 03:20 by Jessbelle
10min 58 secs! I had fun, thanks!

on 6. August 2025, 10:57 by zwy_200606
9:44

on 2. August 2025, 21:00 by RobertBe
4:30 without pencil marks

on 1. August 2025, 20:34 by zimmicks
18:18 lol

on 1. August 2025, 05:35 by Lovejoy
7:51 double just!

on 1. August 2025, 04:46 by e401
33:53. Perhaps pencil marking everything was not the way to go. Thanks for the fun, WP

on 29. July 2025, 20:35 by carrie1295
7:13! Probably spent a little too long thinking about the 2-cell cage rule at the beginning :)

on 27. July 2025, 14:34 by NumberCruncher
9:34 Happy I solved it in under 10 minutes, still trying to force my brain into a higher gear and move on to 2 star difficulty… loved the rule set!

on 27. July 2025, 14:27 by ChampionAsh5357
08:35, so close

on 27. July 2025, 09:09 by daddyov2
9:11 for me

on 26. July 2025, 21:03 by yusuf17
6:39

on 26. July 2025, 10:00 by geronimo92
3:15

on 25. July 2025, 17:01 by FischProf
8:44

on 25. July 2025, 02:12 by ParaNox
6:02 here

on 24. July 2025, 22:15 by Exigus
6:51 but had misread the rules as red cells being "at least" 5 instead of greater than 5 which complicated the start.

on 24. July 2025, 20:32 by SanFranSam
14:07 but it took me a bit to figure out that "two-cell cage" meant two-cell DOMINO. As, technically speaking, there were no two-cell CAGES. Not sure i could've been much faster But fun nonetheless.

on 24. July 2025, 18:35 by Jensa
4:37

Pleased with that!

on 24. July 2025, 16:07 by m1che2
Great fun! 15 minutes but I didnt want to rush it as I was having so much fun (honestly!)

on 24. July 2025, 14:08 by wilsig
6:42

on 24. July 2025, 14:04 by RussKozerski
13:02, after breaking the puzzle with my first try. Fun. Thanks.

on 24. July 2025, 11:03 by Mozart40
6:22 :D

on 24. July 2025, 09:31 by nunc
7:25

on 24. July 2025, 02:57 by abihummel
0:4:05!

on 24. July 2025, 00:41 by Virux
5:55

on 24. July 2025, 00:22 by drifting
3:16 Fun puzzle!

on 23. July 2025, 20:42 by Decapod
7:05, thanks for setting & sharing

on 23. July 2025, 19:48 by frosto
8:18, maybe I would have made it to the second bonus without using the mouse only.
Thanks for this lovely puzzle.

on 23. July 2025, 19:34 by Cheesix
8:24! Only the single bonus, but I'll take it!

on 23. July 2025, 19:29 by Baklin
Same here.
Not reading that rule didn't help. After a few minutes I was wondering why there were red cells. :)

on 23. July 2025, 19:18 by Pseud0bread
7:53. First time ever getting double bonus!

on 23. July 2025, 19:05 by mightcould
13 min plus, but that's because... I didn't read the rules. Specifically, the one about the red cells. Goes much faster once you have that down. :)

on 23. July 2025, 18:46 by davidz32z
5:24 for two party hats please! Wait... I mean double bonus please! I also never used to no two cell cages adding up to 6 rule which is good because I completely forgot about it!

on 23. July 2025, 17:49 by Killer-Ly
Just in time: 7:51!
Enjoyed it very much. Thank you!

on 23. July 2025, 17:41 by Sonyaire
6:27!

Funny enough I never ended up needing to use the rule about two-cell cages summing to less than 6, still a very fun puzzle to speed through!

on 23. July 2025, 17:27 by metacom
6:25, not bad, not bad.

on 23. July 2025, 16:54 by mrMotaaa
6:01 here. Awesome puzzle!

on 23. July 2025, 15:08 by PinkNickels
5:27 today! Nice one.

on 23. July 2025, 15:07 by Bubbalubba
7:14

Last changed on 23. July 2025, 15:16

on 23. July 2025, 14:58 by Ragna
11:43 No bonus...

@Ragna I only put out speed runs every once in a while because people seem to like them. My only hope is that this puzzle makes your day better. Peace. -Will Power

on 23. July 2025, 14:56 by r0the
6:42

on 23. July 2025, 14:44 by drmegadude
5:07!

on 23. July 2025, 14:21 by sammehigan
6.12

on 23. July 2025, 13:19 by henter
5:57. Forgot about the less than 6 part immediately, didn't seem to need it though.

on 23. July 2025, 12:58 by sujoyku
5:28 Apparently, it helps to read the part about the checkerboard. :)
Thank you for this fun puzzle, Will Power!

on 23. July 2025, 12:53 by RafiSan
7:13 ^-^

on 23. July 2025, 12:07 by Saujana
05:27

on 23. July 2025, 11:51 by varbrad
5:06 - lovely jubbly :)

on 23. July 2025, 11:16 by gotem
03:28, nice solve

on 23. July 2025, 09:02 by Kiwo
Cute

on 23. July 2025, 08:59 by damo_89
6:19 woohoo

on 23. July 2025, 08:44 by antiknight
00:03:44! too easy :)

on 23. July 2025, 07:52 by cannonmatthews
23:57

Pleased with myself at least lol. Very fun solve though.

on 23. July 2025, 07:32 by Dermerlin
5:49

on 23. July 2025, 06:34 by Kirra
Just got that double bonus 07:44

on 23. July 2025, 06:13 by Nylimb
I'm usually a slow solver, so I was surprised to finish in 6:21.

on 23. July 2025, 06:10 by milxqueen
6:03 never thought i would get bonus points

on 23. July 2025, 05:28 by zonny
A beatable 6:46!

on 23. July 2025, 05:24 by sfield
04:36. Nice quick puzzle.

Difficulty:1
Rating:92 %
Solved:444 times
Observed:3 times
ID:000O87

Variant combination Online solving tool

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Solution code:

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