Back to Cambridge B 2021

Jun 27, 2021
Cambridge, Massachusetts, United States

Private Residence

Address will be provided to registered competitors.
Organization team
Tim Reynolds
WCA Delegate
Tim Reynolds
Download all the competition's details as PDF here.

This is the first competition in Cambridge in over a year!

We will only be holding 3x3x3 Fewest Moves at this competition. Please make sure you are familiar with the rules of 3x3x3 Fewest Moves.

Please make sure to review the COVID Safety tab. If COVID cases rise, we may need to cancel this competition; competitors will be notified by email in that case.

The venue is a private residence; the address and parking instructions will be emailed to competitors a week before the competition.

Main event
Registration period

Online registration opened and closed .

Registration requirements
This competition is over, click here to display the registration requirements it used.
Create a WCA account here if you don't have one.
If this is not your first competition, associate your WCA ID to your WCA account here.
Register for this competition here.
There is a competitor limit of 10 competitors.
The base registration fee for this competition is $1 (United States Dollar).
If your registration is cancelled before you will be refunded 100% of your registration fee.
We encourage everyone to register for the events they want to compete in via your online registration, however you may add events to your registration up until the event has started.
No on the spot registrations will be accepted.

The $1 registration fee will be collected at the door. If possible, please bring exact change.

This competition is a twin competition with Back to Cambridge A 2021. You may only register for one of the two competitions.

Competitors will be emailed a survey a week before the competition; this must be filled out by Wednesday, June 23.

Click here to display the highlights of the competition.

Nipun Kisari won with a mean of 36.67 moves in the 3x3x3 Fewest Moves event. Marcus Kamen finished second (39.33) and Roy Lee finished third (46.33).

Event Name Best Average Citizen of Solves
3x3x3 Fewest Moves Nipun Kisari 32 36.67 United States 383240
Event Round Format Time limit Proceed
3x3x3 Fewest Moves Final Mo3 1 hour

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Schedule for Sunday (June 27, 2021)

From 12:30 PM
To 01:00 PM
Main Room
From 01:00 PM
To 02:00 PM
3x3x3 Fewest Moves Final (Attempt 1)
Main Room
Time limit
1 hour
From 02:20 PM
To 03:20 PM
3x3x3 Fewest Moves Final (Attempt 2)
Main Room
Time limit
1 hour
From 03:40 PM
To 04:40 PM
3x3x3 Fewest Moves Final (Attempt 3)
Main Room
Time limit
1 hour
From 05:00 PM
To 05:15 PM
Main Room

Please note that the following restrictions will be in place:

  • Competitors may bring at most one guest. Please note in the survey sent out a week before the competition whether you plan to have a spectator join you.
  • Everyone must wear a mask at all times, covering both nose and mouth. The only exception is while taking a drink. There won't be a lunch break or any food provided.
  • There will be assigned seating, including for guests / spectators. You'll need to stay in your seat for the entire competition, except for bathroom breaks.
  • The competition may be cancelled if the COVID situation in the US or Massachusetts gets worse.
  • If you have COVID, or are instructed to quarantine after close contact with someone who tests positive, do not attend the competition.

Competitors who choose not to follow these restrictions will be disqualified and will need to leave the venue.

The competition will be held at Tim Reynolds' house. The address will be provided to registered competitors a week before the competition. It is near Alewife in Cambridge, Massachusetts, USA.

There is public transit available very nearby. Limited street parking is also available.

Back to Cambridge A 2021 (Saturday, June 26) and Back to Cambridge B 2021 (Sunday, June 27) are Twin Competitions. This means that competitors are only allowed to compete in one of the two. If you are already registered for Back to Cambridge A 2021, and subsequently register for Back to Cambridge B 2021, your registration for Back to Cambridge B 2021 will be rejected.

This will allow us to let 20 competitors compete, instead of only 10.

Why aren't you holding speedsolving events?

This is our first post-COVID competition, and we want to hold a competition as safely as possible, so we're starting with just Fewest Moves for now. If case numbers continue to drop in the US, and in Massachusetts, we have every intention of holding competitions over the next few months with more events. It'll be a while before things are fully back to normal, but we plan to start getting back to normal as we are able to safely do so.

I've never attended a competition before. Should I attend this one?

Newcomers are welcome! Please note, though, that we're not holding the normal speedsolving events that you're used to. Please make sure to familiarize yourself with the rules of Fewest Moves solving.

Can I bring a guest?

Each competitor may bring at most one guest. There will be additional seating available for guests. Fewest Moves is not particularly exciting to watch, so please consider bringing a book or a laptop. If weather permits, there are a few parks nearby where you can go for a walk. Guests will also be required to wear a mask.

I'm vaccinated, do I need to wear a mask?


Time limit

If you reach the time limit during your solve, the judge will stop you and your result will be DNF (see Regulation A1a4).


The format describes how to determine the ranking of competitors based on their results. The list of allowed formats per event is described in Regulation 9b. See Regulation 9f for a description of each format.

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