Findings:
- magnum opus
- RSA Secret Key Challenge
- challenge
- Pepsi Challenge
- Challenge of the Future
- Real World Road Rules Challenge
- Challenge a stupid patent
- The Saltine Challenge
- 13 challenges for the 13th generation
- Nodeshell Challenge
- University Challenge
- Agnosticism is the greatest intellectual challenge
- Christian challenge
- The Cheap Beer Challenge
- Scrapheap Challenge
- Minerva challenges Arachne
- BT Global Challenge
- Front Page Challenge
- Simon Singh's Code Book Cipher Challenge Cracked
- The challenge we face
- Reading Between the Lines: Lessons from the SDMI Challenge
- 24 challenge
- Daz Doorstep Challenge
- voluntary challenges in Nethack and Slash'Em
- The Great E2 Fin de Siecle Fiction Challenge
- European Soccer Challenge
- The 2-sentence Fin de Siecle Fiction Challenge Entry
- Learning Machine Challenge
- The 1-sentence Fin de Siecle Fiction Challenge Entry
- Fiction challenge results
- Challenge of Nexar
- Triangle Challenge
- Triangle Challenge Solution
- The Long Island Challenge
- Fed Challenge
- ECCp-109 Challenge
- Challenge Coin
- Chip's Challenge
- Ferrari F355 Challenge
- American Solar Challenge
- Freedom's Challenge
- James Randi Paranormal Challenge
- Three Peaks Challenge
- BOC challenge
- Challenge for Change
- Full Metal Challenge
- Cheesily Cheerful Chart Challenge
- The Lyme Park Downhill Challenge
- Most Extreme Elimination Challenge
- E2verse Valentines Challenge (collaboration)
- challenge response
- F1 Career Challenge
- Secret Me-Meta-Node Challenge
- The 99p Challenge
- DARPA grand challenge
- Challenge everything
- E2verse previous challenge (collaboration)
- Ivan's challenge
- Three Pint Challenge
- The Mentos Challenge
- wertperch's nodeshell challenge (document)
- Puzzle Quest: Challenge of the Warlords
- The Stephen King Challenge
- Harry Potter Interactive DVD Game: Hogwarts Challenge
- Millennium Challenge 2002
- THE IRON NODER CHALLENGE
- The Notebook Challenge
- Clomid challenge
- THE IRON NODER CHALLENGE 2: ELECTRIC BOOGALOO
- The Nuzlocke challenge
- THE IRON NODER CHALLENGE 3: THIS TIME IT'S MARTENSITIC
- Secret Santa Summer Nodeshell Challenge 2011
- "So?" is a challenge
- THE IRON NODER CHALLENGE 4: FERRASSIC PARK
- The challenge of writing a meaningful free-form poem using only two letter words
- THE IRON NODER CHALLENGE 5: THE FERROUS FRONTIER
- Sahara's Math Challenge # 1
- Noah's Ark challenge
- a partner who challenges you
- THE IRON NODER CHALLENGE 6: RUST NEVER SLEEPS
- The 2013 IRON NODER CHALLENGE (document)
- THE IRON NODER CHALLENGE 7: NODE HARDER WITH A VENGEANCE
- Up for a challenge?
- THE IRON NODER CHALLENGE 8: RUST IS FOR THE WEAK
- THE IRON NODER CHALLENGE: 9 FAST 9 FERROUS
- October Skeleton Challenge
- Ice bucket challenge
- THE IRON NODER CHALLENGE XII: WE'LL RUST WHEN WE'RE DEAD
- even if you fall from an impossible challenge,
- where you see mysteries, i see challenges
- "Age by age" reading challenge
- A Challenge is Issued
- Congratulations, you are about to experience a profound challenge
- .44 Remington Magnum
- Magnum Size
- Magnum, P.I.
- Magnum, P_I
- Magnum
- Magnum XL-200
- o magnum mysterium
- Arctic Warfare Magnum
- Foramen magnum
- Magnum Research
- Magnum (user)
- Magnum 44
- Dodge Magnum
- magnum opiate
- .500 S&W Magnum
- .357 Magnum Stress Management System
- .22 Winchester Magnum Rimfire
- Opus (user)
- Opus 3
- opus infinitum
- Opus Dei
- Marmoratum opus
- Opus
- Mr. Holland's Opus
- Moog Opus 3
- magnus opus
- Beethoven Piano Sonata No. 7
- Directory Opus
- Opus 67
- Daemon Opus (user)
- Opus Number
- Opus 40
- Si opus sit
- Penguin Opus (user)
- Chopin Polonaise: Opus 26 no.1 & 2
- Chopin Polonaise: Opus 40 no.1 & 2
- Chopin Polonaise: opus 44
- Chopin Polonaise: Opus 53
- Chopin Polonaise: Opus 61 (polonaise-fantaisie)
- Opus IV
- Ronald Opus
- cybook opus
- Doctor Korgon's Robotic Opus
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