- diagram + -less (Wiktionary)
“It was my father who would sit with me and amaze me as he solved diagramless crossword puzzles and double acrostics by simply reading the clues and writing in the answers to each as he read them.”
“Later, at home, I finished the diagramless puzzle, and it was a puzzle for the ages!”
“UPDATE: I started the diagramless puzzle in the café, but it was tricky, and, using a pen, I found myself in need of Wite-Out soon enough.”
“I can only think of one diagramless puzzle that was more impressive.”
“Practically unbeatable at Scrabble and cribbage, he always finished the Sunday New York Times crossword puzzles (even the diagramless).”
“There are several types; acrostics (usually every other week), American English cryptics, diagramless, etc.”
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