Logic Masters Deutschland e.V.

A tribute and showcase puzzle, featuring original rulesets by many setters (hence the massive rules). Clicking the name of the setters will lead you to one of their puzzle using that ruleset dopplperschg John Conway Game of Life

Solve on the CTC app GLOBAL

Normal sudoku rules apply, in that repeats cannot occur within any 4x4 grid (the central grid is also a 4x4, despite not showing sixteen red cells; the dotted lines are its borders)
Each 4x4 grid uses a different set of digits, which are to be determined by the solver. Moreover, only digits that appear in the central grid can appear in more than one of the outer grids
Every digit from 0 to 9 needs to appear in the final solution, and where a grid contains a 0, that grid needs to follow the Doppelganger rules (in other words, a Doppelganger grid will effectively contain a set of five digits)

RANGE ARROWS (filuta)

– Digits in a circle tells you how many steps in the direction of the arrow you have to go (from the tip of the arrow) to find the sum of the digits on the arrow
– Arrows connected to the same circle always have the same sum

DOPPELGANGER (Kafkapharnaum)

A Doppelganger grid is one containing the digit 0, and in effect, five digits. In such grids, fill the grid with the digits 0, (W), (X), (Y) and (Z) such that:
– Every row, column, and box contains the digit 0 always, as well as three out of the four digits (W), (X), (Y) and (Z) (ie, it's missing one digit that is not 0)
– No two row, no two column, and no two box may be missing the same digit
– For each 0 in the grid, the digits missing in its row, its column, and its box must be three different digits
– Where a grid is proven to contain a 0, that grid has to obey the Doppelganger rule on top of the others***

STANDARD ARROWS
– Digits in a circle indicate the sum of the digits along the connected arrow

STILL LIFE (Sktx)

Shade some cells green ("alive cells") such that the – up to – eight cells neighboring each green cell contain exactly 2 or 3 other green cells and the neighbors of each 'unshaded' – or grey – cell ("dead cells") do not contain exactly 3 green cells
– A CIRCLED cell's digit indicates the number of cells that are in the SAME state as its own in its neighborhood, INCLUDING its own cell
– A SQUARED cell's digit indicates the number of cells that are in a DIFFERENT state from its own in its neighborhood (therefore not including its own cell)

COORDINATE CAGES (Samish) / COORDINATE ARROWS (Piatato/Aaronomys)

– In cages, digits may not repeat and each cage (clued with a small number in its top left corner) is either a killer cage or a coordinate cage
– In killer cages, the clue gives the sum of the digits in the cage; in coordinate cages, the clue spells out the coordinates of a cell that is the sum of the digits in the cage. It's up to the solver to determine which cage is which
– Digits on an arrow spell out the coordinates for the digit that is their sum. The row number is written on the start of the arrow, the column number is written on the arrow tip. If for example an arrow looks like this: -1 4-> then there must be a 5 in r1c4. All the arrows AND cages must correspond to different coordinates. Digits may repeat on an arrow if allowed by other rules
***A 0 coordinate for the row or column would refer to the first adjacent cell in the central grid -- ie, the four red cells from the center grid that touch the blue grid could all be valid 0 coordinates