The psychological benefits of regular mental workouts are fairly mind-stretching in themselves. One study found that doing a single crossword each week could lower the risk of dementia in old age by 7 percent; those who did four crosswords a week were at 47 percent less risk than the once-a-week solvers. —Oliver Burkeman in Brain Teaser.

Quick crosswords in the Guardian.

Completed puzzles—

Cryptic (Rufus on Mondays): 26,783, 27,688

Everyman: 3616 to 3226 Best Time–21:51 on 3516

Quiptic: 31; 842 to 808; 769 to 756

Quick (new): 13967 to 13654 Best Time–6:22 on 13742

Quick (old): 9377 to 9093 and 135 Best Time–6:24 on 9241

Words I’ve learned doing crossword puzzles: 8A Coypu, 4D Otiose, 3D Louche, 11D Crapulent, 21A Recto, 4A Duple, 21A Tombola, 6D Ambit, 3D Titivate, 16D Fillip, 18D Etui, 21A Matelot, 17A Ambit, 11D Lorgnette, 15D Ghyll, 2D Orotund, 3D Mangelwurzel, 6D Drop A Brick, 3D Nous, 17D Waits

There is a typo in puzzle 9152 12D, lodk should be look.

Helps:
–Anagram Solver
–Best For Puzzles
–Collins Cricketing Terms
–Collins Thesaurus
–Cricket Terms
–Idioms
–Merriam-Webster Dictionary
–Oxford Dictionary
–WordFinder