Logic Masters Deutschland e.V.

The source inspiration for this puzzle was cover of Led Zeppelin's fourth album (the one with Stairway To Heaven on it). The cover shows an image of a man standing in a field, with trees in the background. He has a large bundle of twigs strapped to his back, and is supporting his weight with a stick.

Normal sudoku rules apply. Place the digits 1-9 once each in every row, column and 3x3 box.

• Digits along the thick grey line must strictly increase along any path moving away from the bulb in R3C7.
• Digits along a thin grey line must sum to the number in the attached circle.
• Adjacent digits along a green line must have a difference of at least 5.

The puzzle is available online via Sudokupad

Other puzzles in the iconic album cover series:

• Kraftwerk - Autobahn
• Fleetwood Mac - Rumours
• The Beatles - White Album
• David Bowie - Aladdin Sane
• The Clash - London Calling
• Pink Floyd - Dark Side Of The Moon
• Bruce Springsteen - Born In The USA
• The Velvet Underground - Velvet Underground & Nico