ISC rules

Rules of the International Solving Contest (ISC)

  1. Event: The ISC is a solving competition appointed by the WFCC for individual solvers taking place on multiple locations worldwide on a Sunday at the end of January concurrently in all participating countries.
  2. Organisation: at the WCCC of the preceding year central controller(s) are appointed by the WFCC delegates who will take the overall responsibility of the contest.
  3. Admittance: For the admittance of each participating place a reliable local controller with email address has to be appointed for the responsibility of organising the local tournament, preferably by the local controller of the respective country; otherwise the central controllers decide about the acceptance of local controllers.
    There is no limit for the amount of local competitions and multiple places per country are possible. Solvers are admitted in any local competitions, also in other countries.
  4. Categories: The competition comprises three solver categories:
    • Category 1 for experienced solvers, but open for all solvers
    • Category 2 for inexperienced solvers with no rating or with an active, non-active or half-rating of less than 1700
    • Category 3 for youth not older than 13 years in the year of the competition

    Separate results are recorded for youth, females and seniors. For Category 1 only results of solvers will be rated. However, for all solvers no norms for titles are possible.

  5. Begin: The start of the contest should be at 11 a.m. CET (Central European Time) in all countries. Central controllers can allow a different beginning time of the contest for Asia and the Americas and an earlier or later beginning time of one hour at most for all other countries.
  6. Rounds: The rounds of the contest last two hours for all categories.
    There are two rounds for category 1 and 2 with a break of at least half an hour with a maximum of one and a half hour between the two rounds.
    For category 3 there is one round only.
  7. Modus:
    • Category 1: for each round a 2#, 3#, n#, eg, h# and s#
    • Category 2: for each round two 2# and one 3#, n# and eg and in one round a h# and in the other round a s#
    • Category 3: four 2#, a 3# and an eg
  8. Rules and Appeals: General applicable solving rules of the WCSC/ECSC apply accordingly. Appeals by solvers have to be sent to the central controllers who will decide in the first instance. In case of disagreement a 3 man committee with members of the WFCC Solving Committee will be appointed for the final decision.
  9. Tools: (technical tools used by central and local controllers)
    All communication between central and local controllers by email
    Entry of results by local controllers on MatPlus website:
    Use of the Solving Tournament Manager software is mandatory for the central controllers and recommended for the local controllers so that the effort of all involved parties is reduced.
  10. Timeline: (specification of latest deadlines in days – ISC = date of contest)
    • registration of local controllers until the end of the previous year
    • distribution of complete documentation by central to local controllers: ISC-7
    • registration at MatPlus website by local controllers: ISC-7
    • mailing of results to central controllers: ISC+3
    • entry of preliminary results at MatPlus website by local controllers: ISC+5
    • mailing of scanned solving sheets to central controllers: ISC+10
    • publication of preliminary results by central controllers: ISC+21
    • possible appeals by solvers: ISC+28
    • publication of final results: ISC+35
    • prize giving and distribution of certificates at next WCCC


PDF documents that the local controllers receive from the central controllers by email

  • One sheet with diagrams of the problems for each round
  • One solving sheet for writing the solutions by solvers for each round
  • One sheet with diagrams and solutions of the problems for each round
  • A form for summarising the results

Tasks of the local controllers

  • Organisation of the local contest including reservation of suitable tournament venue
  • Announcement in local publications (magazines, websites, etc.)
  • Invitation of local solvers by mail or email
  • Reproduction of various sheets to be distributed to solvers during the contest
  • Checking of solutions and point marking on the solving sheets
  • Entry of preliminary results on special MatPlus website
  • Email the results to the central controllers
  • Email the scanned solving sheets to the central controllers
  • Keeping of original solving sheets to ensure back-up
  • Use of the Solving Tournament Manager software is highly recommended

Tasks of the central controllers

  • Selection of the problems according to the WCSC/ECSC rules and creation of the whole documentation necessary for the contest; especially diagrams at least for category 3 with coordinates (digits and letters) and rules for writing the solutions (like “twomovers: only the key-move” etc.)
  • Creation of the invitation document, including distribution to WFCC delegates and previous local controllers
  • Acceptance and registration of announced persons as local controllers on the MatPlus website
  • Distribution of the complete documentation to local controllers
  • Supervision of the overall contest
  • Checking of the local controllers’ markings
  • Decision on possible appeals by solvers
  • Distribution of final results to WFCC delegates, local controllers and the WFCC webmaster

ISC rules in PDF

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