Hard Crossword 5.5 Rating 99.99999% of humans cannot beat

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Across
  1. 2. Brother Powder?
  2. 4. speed chess
  3. 7. colds that last a long time
Down
  1. 1. They come in last
  2. 3. Whirlybird
  3. 5. Pictures of Yosemite?
  4. 6. Strips in geography class