How to play
- Goal
- Divide the whole numbered grid into connected regions, each of N cells containing every number from one through N exactly once.
- How it ends
- The chart is won when every cell belongs to a valid region; Erase and Undo repair your work without losing progress.
- Record
- Your first unassisted solve of each chart is kept in this browser; verified solves under twenty-four hours compete for fastest-time records. Replays are practice.
- Every cell contains a printed number. Cover the whole grid with connected regions.
- A region of N cells contains exactly one each of 1 through N. The numbers need not lie in order.
- Select a printed one, then tap or paint cells into its region. Regions may bend; a lone one is valid.
- Erase removes ordinary cells, and Undo repairs a move. Restart keeps the first clock running; replay is practice.
Controls
| Mouse / touch | Select a printed one, then tap or paint its cells; with no selection, tap an assigned cell to select its region |
|---|---|
| Arrows + Enter / Space | Move the cursor and select or paint a cell |
| Delete | Erase an ordinary cell |
| Z / Y | Undo / Redo |
| Escape | Cancel a stroke or selection, close a dialog or return to the atlas |
| Controller | D-pad moves; A selects or paints; X erases; B cancels or returns; shoulders Undo/Redo; Start tools; Back rules |
Tips for Renkatsu
- Check the set A six-cell region needs one each of 1, 2, 3, 4, 5 and 6. A repeated value means another is missing.
- Use shared sides Diagonal contact alone does not connect a region. Bent shapes are allowed.
- Trace from a one Every finished region has exactly one printed one. Select it to paint the region.
Questions about this game
Must a region be rectangular?
No. Any shape connected through shared sides is allowed.
Must numbers form an increasing path?
No. They can appear in any arrangement within the region.
Can a one stand alone?
Yes. A one-cell region contains exactly its required one.
Can replay improve my first time?
No. Your first completed time is retained; replay is practice.
All charts are open. Progress and the original clock survive reload; a resumed completed time is saved only in this browser.
Watch how to play
About Renkatsu
G
r
o
u
p
p
r
i
n
t
e
d
n
u
m
b
e
r
s
i
n
t
o
c
o
n
n
e
c
t
e
d
r
e
g
i
o
n
s
c
o
n
t
a
i
n
i
n
g
o
n
e
o
f
e
v
e
r
y
v
a
l
u
e
f
r
o
m
o
n
e
u
p
t
o
t
h
e
i
r
s
i
z
e
.
E
x
p
l
o
r
e
1
6
0
o
r
i
g
i
n
a
l
c
h
a
r
t
s
w
i
t
h
i
r
r
e
g
u
l
a
r
b
o
u
n
d
a
r
i
e
s
.
