Monthly Archives: June 2021

KrazyDad Super-Tough 555


This post’s  basic trace on Super-Tough v. 5, b. 5, #5 illustrates the full use of 3-fills in the bypass, and closes with a six node remote pair. On the grid as the bypass is completed, S9 is marked as … Continue reading

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Krazydad Super-Tough 545 Wraps Up Fast


It’s mostly in Basic with Super-Tough v. 5, b.4, # 5. The post of March 26, 2013 reports a long XY chain, followed by two remarkable irregular XYZ-wings, then two finned swordfish. However, this update shows that the generous bv … Continue reading

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KDST 535 Trips on a Basic X-Wing


The X-wing is the easiest fish to spot. So easy, that the process of line marking finds it if you’re paying attention. KrazyDad’s Super-Tough v.5, b.3, #5 demonstrates. The last line marked was r1, because it had the most free … Continue reading

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KrazyDad Super-Tough 525 Review Update


This post has an updated solution of KDST 525, starting with a 3-fill and a rare remote pair. The bv scan has an irregular XYZ-wing, and the 6-panel features a  long XY nice loop that illustrates the XY Railroad on … Continue reading

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KrazyDad Super-Tougn 515 Starts a Review Update


This post begins the update review of the Super-Tough collection available on krazydad.com with volume 5, book 1, number 5. The Super tough collection was first reviewed in March 2013, but that was one of the first reviews on Sysudoku, … Continue reading

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