Use "?" for one missing letter: pu?zle. Use "*" for any number of letters: p*zle. Or combine: cros?w*d
Select number of letters in the word, enter letters you have, and find words!
It is generally twice as fast as the traditional DAWG algorithms, but take about 5 times space for regulation Scrabble dictionaries. Quackle uses a GADDAG to generate moves. — “GADDAG - Wikipedia, the free encyclopedia”, en.wikipedia.org
Please help improve it or discuss these issues on the talk page. It needs additional references or sources for verification. Maven has since switched to a completely different architecture, proposed by John O'Laughlin and implemented in Quackle. — “Maven (Scrabble) - Wikipedia, the free encyclopedia”, en.wikipedia.org
Quackle is an open-source alternative to Maven of comparable strength.  Console and computer video game versions. Several computer and video game versions of Scrabble have been released for various platforms, including PC, Mac, Amiga,. — “Scrabble - Wikipedia, the free encyclopedia”, en.wikipedia.org