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Welcome to the

OSCY Online Solving Challenge 1 for Youth

Challenge 1:- January 2026

Please select the notation
in which you prefer to solve.

Schedule

Mix A = Cat-2(#2, += & S#2) + Cat-1(#3, #n & H#n)
Mix B = Cat-2(#2, #4 & H#2) + Cat-1(#3, += & S#n)

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Tourney Announcements

This is our self-scheduling version.
Start any round at any time in any order to suit you.

As each round completes you should immediately
click the 'Mail my Solutions to Control' & 'Send'
buttons before returning to the Tourney page.

Threats, when applicable, should be included in the
solution to avoid the need for manual marking.

Transpositions in studies can be ignored as only one
is required for full marks.

WCSC rules & recommendations for scoring apply.

Technical Notices & HELP

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simply click on the Show Result buttons in turn.
When done, take a screen-shot of the page header
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