This is a collection of 9273 sentences from Tatoeba.org.
Cards have full English and Spanish sentences as well as cloze deletion formats, and of course genuine native audio by a speaker from central Spain.
Cards are sorted by finding the rank of the least common word in the Spanish sentence from a frequency list on Wiktionary. Sentences thus start easy and get harder.
Each Spanish word is introduced as a cloze once to reduce the number of sentences, much in the same way as Clozemaster's fluency fast track. Note however, that this is not a list of the 9273 most common words tested as clozes in sentences, there simply wasn't enough source material to get enough unique sentences to do that, although most common words are very well represented.
This deck has an improvement over Clozemaster whereby if there are multiple instances of a cloze word in a sentence, they are all hidden. The only time when multiple words are hidden is when they are the same word.
Sample (from 9269 notes)
EnglishSentenceID 300507
SpanishSentenceID 616146
EnglishSentence He is a biologist.
SpanishSentence Él es biólogo.
ClozeWord biólogo
Difficulty 50001