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From Sudopedia, the Free Sudoku Reference Guide
Jump to navigationJump to search- 17:30, 25 October 2021 diff hist +9,442 N Oriented 3D chains Created page with "ORIENTED 3D-CHAINS: NRC-, NRCT-, NRCZ- AND NRCZT- CHAINS 1) NRC-LINKS and GENERAL 3D-CHAINS The basic notion underlying all the 3D-chains is that of an nrc-link. Definitio..." current
- 17:28, 25 October 2021 diff hist +582 N Oriented Chains 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/or from the targ..." current
- 17:22, 25 October 2021 diff hist +903 N Verity Created page with "A '''verity''' is a statement which is true for all alternatives in a limited set. Suppose we have a cell '''A''' and a cell '''B'''. Consider the following implication..." current
- 17:20, 25 October 2021 diff hist +6,684 N Broken Wing Created page with "A '''Broken Wing''' is a single-digit pattern similar to a Turbot Fish. It is also a solving technique that uses this pattern. == How it works == A correct Sudok..." current
- 17:19, 25 October 2021 diff hist +224 N Guardian Created page with "A '''guardian''' is a candidate that prevents a '''Broken Wing''' to form a loop with an odd number of strong links. The role of guardians is explained in the Broke..." current
- 17:17, 25 October 2021 diff hist +11,484 N Generalized Fishy Cycles Created page with "(sorry for the dollar signs, I haven't found yet how to do LaTeX on this wiki) ==Preliminaries== In an incomplete sudoku, we construct a graph as follows. Take a fixed symbol..." current
- 17:15, 25 October 2021 diff hist −6 Remote Pairs current
- 17:13, 25 October 2021 diff hist +2,363 N Remote Pairs Created page with "The '''Remote Pairs''' solving technique uses a XY-Chain involving an even number of bivalue cells, and all the cells have the same two digits as their c..."
- 17:12, 25 October 2021 diff hist +692 N Simple Sudoku Created page with "'''Simple Sudoku''' is one of the many available Sudoku Programs. It justifies its name. The program is very easy to use, making it one of the most popular choices. The s..."
- 17:11, 25 October 2021 diff hist +719 N SSTS Created page with "'''SSTS''' means '''Simple Sudoku Technique Set''', the set of solving techniques implemented in the Simple Sudoku program. Because this set has not changed since 200..." current
- 17:10, 25 October 2021 diff hist +2,236 N Solving path Created page with "A '''solving path''' or '''walkthrough''' is a list of steps that shows how a particular puzzle is solved. Depending on the writer and the intended audience, some basic sol..."
- 17:09, 25 October 2021 diff hist 0 N File:RemotePairExample.png current
- 17:05, 25 October 2021 diff hist +2,457 N XY-Chain Created page with "A '''XY-Chain''' is a chain of cells which each contain only 2 candidates. Because the chain is entirely made up by bivalue cells, the link between the 2..." current
- 17:05, 25 October 2021 diff hist 0 N File:XYChain.png current
- 16:56, 25 October 2021 diff hist +2,520 N X-Chain Created page with "A '''X-Chain''' is a single-digit solving technique which uses a chain consisting of links that alternate between strong links and weak links, with the..."
- 16:56, 25 October 2021 diff hist +324 N Bridge Created page with "A '''bridge''' is a weak link that connects 2 clusters in a coloring technique. Bridges are used in Multi-Colors. They cause the opposite parity of both clust..." current
- 16:54, 25 October 2021 diff hist +5,375 N Nice Loop Created page with "A '''Nice Loop''' is a loop that follows a set of rules and notation guidelines. Several types of chains and loops can also be represented as Nice Loops. The basis fo..." current
- 16:53, 25 October 2021 diff hist 0 N File:ContinuousNiceLoop1.gif current
- 16:53, 25 October 2021 diff hist 0 N File:DiscontinuousNiceLoop4.gif current
- 16:52, 25 October 2021 diff hist 0 N File:DiscontinuousNiceLoopMixedLinks.gif current
- 16:52, 25 October 2021 diff hist 0 N File:DiscontinuousNiceLoopWeakLinks.gif current
- 16:51, 25 October 2021 diff hist +746 N Discontinuous Created page with "A loop is '''discontinuous''' when a single node does not comply with the rules defined for that loop. The following image illustrates the concept: Image:discontin..." current
- 16:51, 25 October 2021 diff hist 0 N File:Discontinuous.png current
- 16:48, 25 October 2021 diff hist +651 N Double Implication Chain Created page with "A '''Double Implication Chain''' or '''DIC''' is a Forcing Chain with implications in both directions. When it starts and ends with the same cell, it is also a Nice Loop...." current
- 16:47, 25 October 2021 diff hist +7,522 N Alternating Inference Chain Created page with "== Definition == An '''Alternating Inference Chain''', better known by its acronym '''AIC''', is a chain of premises, linked by alternating strong and weak inferences...." current
- 16:47, 25 October 2021 diff hist +1,725 N Eureka Created page with "The '''Eureka''' notation system is a compact method to write Alternating Inference Chains. Cells are mainly written in the rncn notation, but other methods like k9..." current
- 16:45, 25 October 2021 diff hist +253 N Node Created page with "A '''node''' is an item in a chain or loop. It can be a cell, a candidate or a complex structure like an Almost Locked Set. The term '''vertex''' is somet..."
- 16:38, 25 October 2021 diff hist 0 N File:XChain.png current
- 16:34, 25 October 2021 diff hist +3,612 N Forcing Chain Created page with "'''Forcing Chain''' is the generic term for all types of chains and loops which propagate implications from one cell or candidate to another. People who a..." current
- 16:34, 25 October 2021 diff hist +2,140 N Forcing Net Created page with "A '''Forcing Net''' shows a contradiction or a verity which is caused by testing a candidate. Also known as '''Generalized Forcing Chain'''. The term '''Contradict..." current
- 16:32, 25 October 2021 diff hist 0 N File:Forcing net.png current
- 16:30, 25 October 2021 diff hist +414 N B/B Plot Created page with "A '''Bivalue/Bilocal Plot''' is a diagram that shows the strong links between candidates in a Sudoku grid. Such a diagram is a useful tool to identify c..." current
- 16:30, 25 October 2021 diff hist +282 N Template:Stub Created page with "{| style="background:none;margin-top:12px;border:1px solid #e0e0e0;" | style="vertical-align:middle;" | Image:Stub_icon.gif | style="vertical-align:middle;" | ''This artic..."
- 16:30, 25 October 2021 diff hist 0 N File:Stub icon.gif current
- 16:18, 25 October 2021 diff hist +8,766 N Uniqueness Clue Cover Created page with "A pattern of clues in a designated area of the grid is said to be a '''Uniqueness Clue Cover''' ('''UCC''') when at least one of the eliminations that..." current
- 16:17, 25 October 2021 diff hist +1,693 N Footprint Created page with "== Definitions == The '''footprint''' of a pattern of solved cells is a list of 27 sets, where: * set 1 = values in row 1 of the pattern * set 2 = values in row 2 of the patt..." current
- 16:08, 25 October 2021 diff hist +17 Given
- 16:02, 25 October 2021 diff hist +801 N Reverse BUG Lite Created page with "The '''Reverse BUG Lite''' is a generalization of the Reverse BUG solving technique. It can be stated as follows: : In solving a sudoku with a Uniqueness Controv..." current
- 15:34, 25 October 2021 diff hist +2,517 N Reverse BUG Created page with "In a 9 by 9 sudoku, a '''Reverse BUG''' is a state of the grid where every solved cell of two particular digits form an unavoidable set of less than 18 cel..." current
- 15:34, 25 October 2021 diff hist +560 N Unavoidable set Created page with "An '''unavoidable set''' is a deadly pattern from the point of view of a puzzle maker, or somebody who likes to investigate solution grids. Take the following exa..." current
- 15:23, 25 October 2021 diff hist +10 Uniqueness Test
- 15:15, 25 October 2021 diff hist +5,952 N Avoidable Rectangle Created page with "An '''Unavoidable Rectangle''' is a 4-cell deadly pattern in a Sudoku solution; for example: xy . . | yx . . | . . . yx . . | xy . . | . ...." current
- 15:14, 25 October 2021 diff hist −8 Solving technique
- 15:13, 25 October 2021 diff hist 0 N File:Avoidabler201.png current
- 15:12, 25 October 2021 diff hist 0 N File:Avoidabler101.png current
- 15:11, 25 October 2021 diff hist +169 N Solved cell Created page with "A cell in the puzzle whose digit value is known through having been derived by the solver, as opposed to being provided as a given clue by the puzzle author." current
- 15:01, 25 October 2021 diff hist +305 N Color Wing Created page with "A '''Color Wing''' is a subtype of coloring that eliminates candidates using multiple clusters. The eliminations take place outside these clusters. Further de..." current
- 15:00, 25 October 2021 diff hist +5,049 N Color Wrap Created page with "'''Color Wrap''' is a subtype of coloring that eliminates candidates for one of the parities in a single cluster by exposing a contradiction in..." current
- 14:59, 25 October 2021 diff hist +1,184 N Color Trap Created page with "'''Color Trap''' is a type of coloring that uses a single cluster with only 2 colors to perform eliminations outside this cluster. Together with the Color Wrap, th..." current
- 14:57, 25 October 2021 diff hist +12 Weak Colors current
