or solve online (using our beta test of Penpa-Edit tools)
Theme: Easy Logic
Rules: Standard Cross the Streams rules.
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 1:45, Master = 2:30, Expert = 5:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Triple Play
Rules: Standard Cross the Streams rules.
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 4:00, Master = 6:30, Expert = 13:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
This is a “Franken-Friday” puzzle variation.
Theme: Logical
Rules: Standard Cross the Streams rules, except that the puzzle uses an early number system that only has the concepts of “one” and “many”. All number clues greater than 1 are represented by a + symbol.
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 3:15, Master = 6:30, Expert = 13:00
Solution: PDF
Editorial Note: This variation was inspired by a puzzle on a recent Tapa Variations Contest by Serkan Yürekli. A new Tapa Variations Contest runs this weekend for those that are interested.
or solve online (using our beta test of Penpa-Edit tools)
Theme: Threes Frame; an extra large Cross the Streams puzzle by its inventor, Grant Fikes, marking his 50th post here.
Rules: Standard Cross the Streams rules.
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 8:00, Master = 14:00, Expert = 28:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
This is a “Twisted Tuesday” puzzle variation.
Theme: Inverted Clues
Rules: Variation of Cross the Streams rules. The clues in this puzzle are inverted. They indicate the WHITE (unshaded) areas, not the black areas as in other Cross the Streams. The shaded cells must still obey the regular rules (connectivity, no 2×2 squares).
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 2:15, Master = 3:30, Expert = 7:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Rise and Fall
Rules: Standard Cross the Streams rules.
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 6:00, Master = 10:30, Expert = 21:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between a Shading mode and a composite Yajilin mode where left click inside cell shades square, left click + drag draws line segment, right click inside cell adds dot, and right click on cell edge adds an x.)
This is a “Franken-Friday” puzzle variation.
Theme: Mostly logical; after solving, did you notice the message in the top few rows?
Rules: Standard Cross the Streams rules. Also, the shaded region must be able to be split into tetrominoes to form a valid LITS solution.
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 4:00, Master = 7:30, Expert = 15:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Mostly themeless, except for the logical solving path
Rules: Standard Cross the Streams rules.
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 6:00, Master = 10:00, Expert = 20:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Mostly themeless, except for the logical solving path.
Rules: Standard Cross the Streams rules.
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 4:15, Master = 6:00, Expert = 12:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Two Easy? A counterpoint to the excellent “Two Hard!” from a few weeks ago with fourteen 2’s this time.
Rules: Standard Cross the Streams rules.
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 2:00, Master = 3:00, Expert = 6:00
Solution: PDF