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or solve online (using our beta test of Penpa-Edit tools)

Theme: Logical

Author/Opus: This is the 210th puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Standard Yajilin rules.

Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 4:30, Master = 6:15, Expert = 12:30

Solution: PDF; a solution video is available here.

Note: Follow this link for other classic Yajilin. If you are new to this puzzle type, here are our easiest Yajilin to get started on.

PDF

or solve online (using our beta test of Penpa-Edit tools in edgex mode where left click+drag draws lines and right click marks X’s)

Theme: Clue Symmetry and Logic

Author/Opus: This is the 207th puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Standard Slitherlink rules.

Answer String: Enter the length in cells of each of the internal loop segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 0:45, Master = 1:45, Expert = 3:30

Solution: PDF

Note: Follow this link for other classic Slitherlink. If you are new to this puzzle type, here are our easiest Slitherlink puzzles to get started on.

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or solve online (using our beta test of Penpa-Edit tools in linex mode where left click+drag draws lines and right click marks X’s)

Theme: Clue Symmetry and Logic (for patron Chris Green)

Author/Opus: This is the 126th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Masyu rules. Also, the loop must make the same number of turns in each bold region that it enters. It is up to you to determine how many turns this is. Be sure to count all turns, including turns in black circles. (The loop does not necessarily enter all regions.)

Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 6:30, Master = 8:30, Expert = 17:00

Solution: PDF; a solution video is available here.

Note: Follow this link for other variations of Masyu and this link for classic Masyu. If you are new to this puzzle type, here are our easiest Masyu to get started on.

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or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between lineox mode where left click+drag draws lines and left click in a square marks O and X, and a Letter entry mode.)

Theme: Up to Eleven (for patron Phleb)

Author/Opus: This is the 111th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Place the words into the grid (one letter per cell) so that they do not touch each other, not even diagonally, and so that they can be read in a straight line in a vertical or horizontal direction. Some letters in the words are already given in the grid. Then find a path that passes through every cell of the grid, starting with the first letter of the first word, passing through the words in order from their first letters to their last letters, and ending at the last letter of the last word. Ignore the black cell.

Or see this example:

Answer String: Enter the number of turns the path takes between each of the words in order as a single string of numbers. (Ignore turns in cells with letters.) The answer for this example is “224”.

Time Standards (highlight to view): Grandmaster = 5:30, Master = 7:00, Expert = 14:00

Solution: PDF

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or solve online (using our beta test of Penpa-Edit tools)

Theme: Phi (for patron TheSubro)

Author/Opus: This is the 17th puzzle from our contributing puzzlemaster John Bulten.

Rules: Standard Yajilin rules.

Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 3:30, Master = 4:45, Expert = 9:30

Solution: PDF

Note: Follow this link for other classic Yajilin. If you are new to this puzzle type, here are our easiest Yajilin to get started on.

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: Clue Symmetry and Logic

Author/Opus: This is the 34th puzzle from our contributing puzzlemaster Murat Can Tonta.

Rules: Standard Yajilin rules.

Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 1:15, Master = 1:30, Expert = 3:00

Solution: PDF

Note: Follow this link for other classic Yajilin. If you are new to this puzzle type, here are our easiest Yajilin to get started on.

PDF

or solve online (using our beta test of Penpa-Edit tools in edgex mode where left click+drag draws lines and right click marks X’s)

Theme: Sum of Five Pentominoes (originally on the US round for the 2016 WPF Puzzle Grand Prix)

Author/Opus: This is the 243rd puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Slitherlink rules.

Answer String: Enter the length in cells of each of the internal loop segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 2:30, Master = 4:15, Expert = 8:30

Solution: PDF

Note: Follow this link for other classic Slitherlink. If you are new to this puzzle type, here are our easiest Slitherlink puzzles to get started on.

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: Clue Symmetry and Logic (originally on 2016 Polish Puzzle Championship)

Author/Opus: This is the 122nd puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Variation of Yajilin rules. The loop can pass through clue cells, and clue cells that are not passed through must be blackened (and obey the standard Yajilin shading rules). Blackened clue cells do not necessarily have to be satisfied.

See also this example:

Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 5:30, Master = 10:30, Expert = 21:00

Solution: PDF; a solution video is available here.

Note: Follow this link for classic Yajilin. If you are new to this puzzle type, here are our easiest Yajilin to get started on.

PDF

or solve online (using our beta test of Penpa-Edit tools in lineox mode where left click+drag draws lines and left click in square marks O and X.)

Theme: Clue Symmetry and Logic (originally on 2016 Polish Puzzle Championship)

Author/Opus: This is the 121st puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Draw a single closed loop (without intersections or crossings). Each clue gives the number of surrounding clues used by the loop. The loop can pass through the clue cells.

See also this example:

Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.

Solution: PDF

Time Standards (highlight to view): Grandmaster = 3:15, Master = 5:30, Expert = 11:00

(view directly for a larger image)

PDF

or solve online (using our beta test of Penpa-Edit tools in linex mode where left click+drag draws lines and right click marks X’s)

Theme: Logical

Author/Opus: This is the 199th puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Standard Masyu rules.

Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 7:30, Master = 10:00, Expert = 20:00

Solution: PDF

Note: Follow this link for other classic Masyu. If you are new to this puzzle type, here are our easiest Masyu to get started on.