Logic Masters Deutschland e.V.

Welcome! Below you'll find four 6x6 puzzles utilizing the "pointing lines" constraint which I recently invented, and you may have seen in Horseshoe Toss on Cracking the Cryptic. I set the puzzles below as a way to teach myself the constraint before taking on a 9x9, so I hope you enjoy them! Click the puzzle image to open it in SudokuPad.
Rules:

• Normal 6x6 Sudoku rules apply.
• Purple lines in the grid are Renban lines. Digits on a line form a set of non-repeating, consecutive digits in any order.
• Digits on a Renban line cannot appear in any of the cells pointed at by the arrowhead.
• The inequality ">" symbols point from a larger digit to an adjacent smaller digit.

Rules:

• Normal 6x6 Sudoku rules apply.
• Green lines in the grid are German Whispers lines. Adjacent digits along the line must have a difference of at least 3.
• Digits on a German Whispers line cannot appear in any of the cells pointed at by the arrowhead.
• The inequality ">" symbols point from a larger digit to an adjacent smaller digit (r6c3 is bigger than r6c4).

Rules:

• Normal 6x6 Sudoku rules apply.
• Digits must strictly increase along a thermometer, starting from the bulb end.
• Digits along a thermometer (including the bulb) cannot appear in any of the cells pointed at by the arrowhead at the tip.

Rules:

• Normal 6x6 Sudoku rules apply.
• Digits on a line with an arrowhead cannot repeat in any of the cells pointed at by the arrowhead.
• The purple lines in the grid are also Renban lines. Digits on a line form a set of non-repeating, consecutive digits in any order.
• The green lines in the grid are also German Whispers lines. Adjacent digits along the line must have a difference of at least 3.