Rooted at 18:21, 20 July 2025

2025-07-20T18:21:17Z

Rooted: Created page with "'''Oriented chains''' are generalisations of the basic xy‑chains. The central idea is that the information collected from previous candidates in a chain (and/o..."

2025-07-20T18:20:40Z

Created page with "'''Oriented chains''' are generalisations of the basic xy‑chains. The central idea is that the information collected from previous candidates in a chain (and/o..."

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'''Oriented chains''' are generalisations of the basic [[xy-chain|xy‑chains]].

The central idea is that the information collected from previous candidates in a chain (and/or from the target) can be used to select the next candidates. Oriented chains are either 2‑D or 3‑D:

* '''Oriented 2‑D chains''': xyt‑chains, xyz‑chains and xyzt‑chains, together with their ''hidden'' counterparts: hxyt‑chains, hxyz‑chains and hxyzt‑chains;
* '''[[Oriented 3D chains]]''': nrct‑chains, nrcz‑chains, nrczt‑chains.

(The original reference to all these chains is the book ''The Hidden Logic of Sudoku''. Further web references forthcoming.)

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−	'''Oriented chains''' are generalisations of the basic [[xy-chain\|xy‑chains]].	+	'''Oriented chains''' are generalisations of the basic xy-chain\|xy‑chains.

	The central idea is that the information collected from previous candidates in a chain (and/or from the target) can be used to select the next candidates. Oriented chains are either 2‑D or 3‑D:		The central idea is that the information collected from previous candidates in a chain (and/or from the target) can be used to select the next candidates. Oriented chains are either 2‑D or 3‑D:

Oriented Chains - Revision history

Rooted at 18:21, 20 July 2025

Rooted: Created page with "'''Oriented chains''' are generalisations of the basic xy‑chains. The central idea is that the information collected from previous candidates in a chain (and/o..."