SSC 2026 (27th Sep - 4th Oct) has started •Discuss
World Sudoku & Puzzle Championship 2026
ISC & SM and IPC & PR 2026
Round 18 : Indrajit3 posts • Page 1 of 1 • 1
@ 2026-09-26 12:15 AM (#41862) (#41862) Top

Administrator



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Administrator posted @ 2026-09-26 12:15 AM

Questions related to Round 18 : Indrajit should be posted here.
@ 2026-09-29 3:14 AM (#41953 - in reply to #41862) (#41953) Top

kiwijam



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kiwijam posted @ 2026-09-29 3:14 AM

R18.5 Invisible Hitori
Can invisible numbers be shaded?

R18.8 Invisible Magnets
The invisible symbols must always be "_PLUS_" or "-", and never an empty shaded cell?
@ 2026-09-29 4:45 PM (#41964 - in reply to #41953) (#41964) Top

amitsowani




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amitsowani posted @ 2026-09-29 4:45 PM

kiwijam - 2026-09-29 3:14 AM

R18.5 Invisible Hitori
Can invisible numbers be shaded?

R18.8 Invisible Magnets
The invisible symbols must always be "_PLUS_" or "-", and never an empty shaded cell?

Invisible Hitori rules do not restrict the invisible cell from being shaded, but that would lead to a non-unique solution as the same cell as unshading the cell would lead to another valid solution.

Invisible magnets: the symbol will always be a '_PLUS_' or '-' sign and can never be an empty cell.
Round 18 : Indrajit3 posts • Page 1 of 1 • 1
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