${DynamicText("About this genre (loading...)")}
Since 1991, this ruleset has been appeared under different names:
- 2001, by Naoki Inaba, as [Percolation|http://inabapuzzle.com/honkaku/parco.pdf] (パーコレーション)
- 2012, by @SerkanYurekli, as [Light and Shadow|https://yureklis.wordpress.com/2012/08/11/light-and-shadows/] (the [current|https://www.gmpuzzles.com/blog/2014/06/light-shadow-serkan-yurekli/] name)
##page.title Puzzles
### **Percolation** by @NaokiInaba
Example:
W=4x4&L=(2)z0(2)z3(4)2(3)z5(2)2(3)3&LF=z4z3z2z4&G=light-and-shadow&A=Naoki_Inaba&B=PinkHoodie&D=2001-05-23&N=1&T=Percolation_(_パーコレーション_)_Example&U=inabapuzzle.com/honkaku/parco.pdf
4 puzzles:
W=6x6&L=(2)z0(2)5(5)2(5)z3(4)z8(5)z2(5)2(5)3(3)z10&LF=z1z2z6z2z2z1z3z4z3z3z2z1z1z3&G=light-and-shadow&A=Naoki_Inaba&B=PinkHoodie&D=2001-05-23&N=1&T=Percolation_(_パーコレーション_)&U=inabapuzzle.com/honkaku/parco.pdf
W=7x7&L=(3)5(5)z3(5)z3(4)3(5)3(4)z3(4)6(4)2(3)z3(5)z5(4)3(3)z8&LF=z2z1z1z6z3z2z4z2z1z1z2z2z5z5z3z2z1z1z4&G=light-and-shadow&A=Naoki_Inaba&B=PinkHoodie&D=2001-05-23&N=2&T=Percolation_(_パーコレーション_)&U=inabapuzzle.com/honkaku/parco.pdf
W=8x8&L=(4)z4(3)4(5)5(5)z4(5)z5(6)4(4)5(6)z5(3)z6(3)3(5)4(3)z5(7)z2(5)7&LF=z0z1z2z4z2z2z3z1z4z2z4z3z4z2z3z1z1z1z3z4z1z4z1z4z1z1&G=light-and-shadow&A=Naoki_Inaba&B=PinkHoodie&D=2001-05-23&N=3&T=Percolation_(_パーコレーション_)&U=inabapuzzle.com/honkaku/parco.pdf
W=9x9&L=(3)z4(4)5(5)3(6)4(3)z3(4)z5(5)8(4)z3(6)z3(5)5(6)3(5)z5(4)z3(4)z11(6)3(5)7(6)z3&LF=z2z1z7z4z1z2z3z3z3z1z3z1z3z2z3z3z3z3z1z7z3z1z1z3z2z5z5z1z2z1&G=light-and-shadow&A=Naoki_Inaba&B=PinkHoodie&D=2001-05-23&N=4&T=Percolation_(_パーコレーション_)&U=inabapuzzle.com/honkaku/parco.pdf
### @PinkHoodie
W=7x7&L=(1)g8(11)z2(3)g2(5)g10yz2(4)g2(1)g10yz2(6)g2&LF=z0z1z1z1z3z1z2z2z2z1z1z1z3z1z7z1z1z3z1z1z1z2z2z3z1z1&X=s17s4s2s2s6&G=light-and-shadow&A=PinkHoodie&D=2024-07-09&F=3&T=Ligssa
W=9x9&L=y10yz1(2)1(3)2yz1(5)1yz3yz6(7)3(2)6y12(5)6yz3yz6y3yz1(5)1(2)2yz1(5)1&LF=z0z1z1z2z1z4z4z8z1z4z5z1z1z3z1z1z2z2z1z1z1z2z1z1z4z1z4z1z4z4z5z1z3z2&G=light-and-shadow&A=PinkHoodie&D=2024-09-10&F=3&T=Prime_V
## Variants
### ´´ambiguous´´´
&V=ambiguous
W=7x3&L=(2)g0(4)4(1)g2(5)g2(3)g5(6)g2&LF=z0z3z4z1z1z1z1z4z1z1z1z1z1&G=light-and-shadow&V=ambiguous&A=PinkHoodie&D=2024-07-10&F=2&O=Ambiguous&T=Ambigis_Die
### ´´ambiguous,shade-no-vertex,unshade-no-vertex´´
V=ambiguous,shade-no-vertex,unshade-no-vertex
W=9x9&L=(2)g1gy3(5)g5(3)3gy4(2)g4(2)g8(3)g4(6)4(7)g4(3)4(4)g4(2)g4(2)g8gy4(3)4(3)g3gy5(4)g3&LF=z0z3z1z1z1z1z1z1z1z1z4z2z1z3z1z1z2z1z2z1z2z3z6z1z1z3z1z1z1z4z1z6z1z3z2z2z3z2z1z1z1z1z2z1z1&G=light-and-shadow&V=ambiguous,shade-no-vertex,unshade-no-vertex&A=PinkHoodie&D=2024-09-21&F=4&T=Hidden_In_Chains
### ´´cross-connectivity´´
V=cross-connectivity
W=7x7&L=yz8(4)1y6(6)z1(6)z3y1(4)6(3)z1y10(3)z1yz6y1&L-XCONNECT=z14z27z12&G=light-and-shadow&V=cross-connectivity&A=xetto&D=2024-10-02
## Acknowledgements and Changes
**2024-07-08** Thanks to @Laclale for gathering the metadata for this genre, and suggesting recommended variants!
**2024-07-09** Many thanks to @Rook for making the [rule panels|../panels] and for detecting a missing constraint!
**2024-07-09** Local variant ´´ambiguous´´ added, as suggestion by @Kinoseidon clarified by @Jubale. Thank you!
**2024-07-09** @PinkHoodie sent the first puzzle for the rollout and crafted the variant panels for local variants ´´ambiguous´´ and globals ´´shade-rectangle´´ and ´´unshade-no-rectangle´´. Thank you!
**2024-07-10** :::puzzletters @PinkHoodie made an ´´ambiguous´´ puzzle!
**2024-09-14** :::puzzletters @PinkHoodie sent 1 classic - thank you!
**2024-09-22** The origins of [Light and Shadow] have been pushed back to 1991, after @PinkHoodie found more information about the genre. In addition, @PinkHoodie transcribed @NaokiInaba's Percolation set!
**2024-09-22** An additional aux mark is available in the ´´ambiguous´´ variant, a suggestion by @PinkHoodie, to mark "potentially shaded" tiles.
**2024-09-21** :::puzzletters @PinkHoodie sent 1 puzzle using variant ´´ambiguous,shade-no-vertex,unshade-no-vertex´´!
**2024-10-03** :::puzzletters A ´´cross-connectivity´´ [Light and Shadow] by @Xetto was added !