${DynamicText("About this genre (loading...)")}

Instances of this genre are scarce:
- 2020: a puzzle by @JeffreyBardon [on 2020-05-26|https://ihnnpuzzles.blogspot.com/2020/05/puzzle-126-where-is-black-cells.html]
- 2022: three puzzles by @bbpz: [100630|PASUSK/100630], [100631|PASUSK/100631], [100632|PASUSK/100632]
- 2024: a puzzle by @xetto [on 2024-12-01|https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?chlang=en&id=000L7X]

PASUSK/:=https://puzsq.logicpuzzle.app/puzzle/

The instances differ in whether numbers may be visited by the loop. This implementation opts to forbid it (as in the latest instance), but that restriction can be overridden by adding global variants ´´number-visit-required´´ or ´´number-visit-allowed´´.


## [kurodoko-loop] Puzzles

### @PinkHoodie

W=9x9&L=(1)22(1)5(1)5(1)21(1)22&LF=z6z7z5z3z2z5z3z2z3z5z3z8z3z7z4z3z5z2&SS=60URURDDDLDLDDRDRDLLLULURUULDLDLDLDLUURULUURURULLURRRDRDRDRU&G=kurodoko-loop&A=PinkHoodie&D=2025-02-27&F=2&T=Singulars
W=16x6&L=(7)2(7)21(3)8(2)13(2)7(4)13(10)8(9)21&LF=z3z12z4z10z1z2z11z2z5z2z9z2z2z9z8z8&SS=60RURRDRURULLURURULLLLDRDLDLLUUULLDLULDLLLULLDRDDRDLLDRRRRUULURRRDDDRRURDR&G=kurodoko-loop&A=PinkHoodie&D=2025-02-11&F=2&T=16x6_1
W=7x7&L=(2)18(11)10(9)10&LF=z2z9z6z3z5z8z12z3&SS=36LLDLLLURRULULUUURDRRURRDRDLLDLDRRRDDLU&G=kurodoko-loop&A=PinkHoodie&D=2025-02-11&F=3&O=Go_to_the_author_comment_spoilers_in_the_link_to_see_the_intended_solve_path.&T=Degenerate_Triangle&U=puzsq.logicpuzzle.app/share/157314
W=7x7&L=(2)13(1)8(7)11y6x1&LF=z6z5z3z3z3z2z6z5z4z11&SS=31DDRDRUUUUULULLDDLULLDDRDLDDRURURUR&G=kurodoko-loop&A=PinkHoodie&D=2025-02-11&F=2&T=Generic_Code
W=8x8&L=(2)29(2)5&LF=z4z14z3z7z2z3z2z7z3z14&SS=63DDDLUULLDDRDRDRDDLULDLLLLLUUURDDRRUULULULUURDRURRRRR&G=kurodoko-loop&A=PinkHoodie&D=2025-02-11&F=2&T=Double_Revolve

## Variants 
### ´´number-visit-required´´

W=7x7&L=(7)4(8)2(9)3(4)11(6)8(3)6(5)8&LF=z0z18z3z2z4z5z4z9z3&SS=29LLDLULUUUUURRDLDDDRURUURURDRDLDLDRRDDLLU&G=kurodoko-loop&V=number-visit-required&A=PinkHoodie&D=2025-02-12&F=2&O=Number_Visit_Required&T=Visit_To_9


## Acknowledgements and Changes
**2025-02-03** Thanks to @PinkHoodie for gathering all known instances of [Kurodoko Loop] puzzles!
**2025-02-08** A spurious constraint, detected by @PinkHoodie, who sent good unit tests, was removed. Thank you.
**2025-02-11** @PinkHoodie crafted the [rule panels|.../panels] for [Kurodoko Loop], as well as the cover pic, and also noticed edge aux marks were missing - thank you!
**2025-02-12** @PinkHoodie sent 3 [Kurodoko Loop] puzzles for rollout, including one using the ´´number-visit-required´´ variant - thank you!
**2025-02-12** The link to the first known [Kurodoko Loop] puzzle was corrected - thanks @MartinEnder!
**2025-02-16** :::puzzletters @PinkHoodie created 2 [kurodoko-loop] (classic) puzzles - 谢谢!
**2025-03-02** :::puzzletters @PinkHoodie prepared 1 [kurodoko-loop] (classic) puzzle - gracias!