Proven Sudoku
Techniques / Exotic and rank-zero
Homogeneous Chains
Also called Homogeneous chain, Typed chain.
New to this shorthand? How to read a sudoku grid explains r4c7, houses, candidates and the rest.
What it means
A chain where every link is the same kind. All one number, say, or all one shape of step. Keeping the links alike makes a long chain easier to follow.
The exact rule, for stronger players
The rule, stated exactly: Chains restricted so that every node is of the same type, for example all bivalue cells or all conjugate pairs of one digit, giving a classification of chain patterns by node homogeneity.
What it removes: As for AIC.
Why it works: Standard chain logic, restricted. The restriction is a classification device, not a different argument.
Worked examples
None yet. This pattern does not turn up in our daily boards, so there is no real example to show. We would rather wait than draw a fake one.
Learn these first
- Alternating Inference ChainA chain that switches between two kinds of step.
Related exotic and rank-zero
- Junior ExocetTwo squares act as a launcher and two more as the target.
- Multi-Sector Locked SetsCount several rows, columns and boxes at once.
- Pattern Overlay MethodEvery digit has to land in one of a fixed set of shapes across the grid.
- Rank TheoryA way to count a pattern.
- Senior ExocetA bigger version of the Exocet pattern, with more squares acting as the target.
How often does it come up?
Our rough estimate: a classification framework rather than a hunted pattern.