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White to move and mate in two #446 - the rings of Uranus [1]
['This Content Is Not Subject To Review Daily Kos Staff Prior To Publication.']
Date: 2023-12-19
The Webb telescope dropped this new exquisite image of Uranus yesterday, just in time for the holidays. The image taken in infrared wavelengths shows Uranus nestled inside its beautiful rings and 9 of its 27 known moons.
Uranus' axis is tilted by 98°. With an orbital period of 84 years, each pole faces the Sun (and Earth) for 42 years. During the years around the solstices, we can see its rings almost face on. The next northern summer solstice will be in 2028.
This series of images from NASA's Hubble Space Telescope taken in 2003, 2005 and 2007 in visible light wavelengths, shows how the ring system around Uranus appears at different tilts as viewed from Earth. The final image taken in 2007 during the Uranus equinox shows the rings seen edge-on, with the poles oriented left-to-right.
Uranus jokes aside, let’s focus on today’s puzzle, composed by noted Argentinian chess composer Arnoldo Ellerman (1893 - 1969) in 1916.
P.S.
The chess puzzle is published on Sundays, Tuesdays and Thursdays at 6:00 p.m. ET.
It is customary for advanced players to wait till midnight ET before posting the full solution. Before then, they provide some stats about the solution (e.g., the minimum number of distinct checkmate moves), help guide others, and sometimes post hints. But there are no hard-and-fast rules; feel free to post comments as you please.
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