What Jessica Fridrich Says About her 20 Years of Speedcubing Experience
May 26th, 2005 by rubikscubesolverssocietyThe first time I met the cube
"face-to-face" was when I was 16 years old in March 1981. I was hooked
since the first moment I saw this absolutely unique combination of
simplicity and ingenuity. There was no need to explain what needs to be
done with it - a self-explanatory, remarkably difficult puzzle with a
devilishly mysterious mechanism inside - a fascinating silent
challenge. The owner of the cube was a 14-year old boy who could solve
the cube in about a minute. He lent it to me for a few minutes just
enough to assemble one face.
Although in March 1981 the cube was being
sold by thousands in other countries and despite the fact that the
invention took place in the neighboring country, it was impossible to
buy the cube in Czech Republic. A classical example of how inefficient
and impotent the Eastern Block economies were. I got my hands on a
primitive solving system from a Russian magazine Kvant
long before I actually owned the cube. I would analyze simple moves and
their action on a piece of paper, trying to figure out algorithms based
on the commutator principle.
Then later in the spring, our local astronomy club leader bought the
cube during his trip to Hungary. He was unable to solve it and could
not find anybody who would put the cube back into its original state.
With the help of the commutator principle and those "Russian" moves, I
solved the cube for the first time. It took me several hours.
I desperately wanted to get my own cube
but whoever was lucky enough to own it, would never sell it. So, I had
to wait a little longer and finally got my first cube in July 1981. A
French family was visiting my sister and their two teenage boys brought
the cube with them. When they saw how attached I quickly became to the
piece of plastic, they did not have the heart to take the cube with
them back to France. That meant that I could finally start working on
my system! During the Summer, I persuaded my parents to visit Hungary,
where I bought three more cubes. It was still a challenge to get the
cubes because they were not available in stores. I bought the cubes
from an old lady who was selling magazines and souvenirs in the street.
When I mentioned "Buvos Kocka" to her, she smiled, quickly looked left
and right and handed it to me in a brown lunch bag, put her index
finger across her mouth, and said "Shhh, one hundred and fifty
Forints". I know all this sounds funny now, especially to those from
Western countries where it was a no-brainer to buy the cube. But this
is how I really started.
At first, I was using the layer-by-layer
system that I learned from a Czech magazine. It was actually already
quite advanced. First the first layer, then the four middle edges (just
one algorithm), then flipping the edges, moving the edges, flipping the
corners, moving the corners. These were my basic algorithms that I
started using and I quickly got my average to about 1 minute. It was
September 1981, three months after I started playing with the cube.
My last year of high school was a strange
and exciting time. A kid solving the cube in public was a head-turner.
Cube was a good conversation starter, although later it was termed by
many as a conversation killer . It was normal for two cubers
who met on a bus to start the conversation without looking at each
others eyes, saying: "How do you this?" "Hmmm, could you do it slowly?"
"Thanks". This is how we built our first primitive systems. I had one
schoolmate from high school who had the same disease - an unconditional
love for the Rubik’s cube. His name was Ludek Marek. He was using the
same system as me, but for some reason he was always trailing about 20
seconds behind me. He once noted while I was solving the cube pointing
to my cube: "Oh, I like this "T" pattern, because when you turn the
edges, the whole last layer will actually flip correctly." It was the
shortest 6-move that influences only the last layer - the move that
perhaps all cubers know. And that sentence stuck in my mind. It was the
germ that later blossomed into the current system. I realized that in
the system I was using it was possible to first flip the edges, then
the corners, then position edges and position corners. This is because
the moves commuted. So, what if I had an algorithm for all flipping
patterns and all permutations? Then I could solve the last layer always
in just two algorithms. Also, the number of patterns was not that big
and they were easy to recognize fast. But where to get the algorithms?
I already knew some portion of them and I gradually started adding
more. Whenever I encountered an orientation that I did not know, I did
it the old way - flip edges and then flip corners. And whenever I
encountered a permutation for which I did not have an algorithm, I
would combine the permutation from the algorithms I already knew. I
began improving very steadily as I improved my system and my ability to
recognize positions quickly. In December 1981, 6 months since time
zero, I was averaging about 35. Occasionally, I would read an article
about a student from Great Britan who solved the cube in 28 seconds,
then about a guy from USA who did it in 24, etc. I was always chasing
the world, trying to catch up. I often felt like it was not possible to
squeeze my times anymore, as if I was already at the limits of what I
can do with my system, but nevertheless, with time, I was able to get
to those magic numbers I previously read in the newspaper. At that
time, I was getting ready for my final examination to finish my high
school. I was combining test preparation with cubing. When I was
messing up the cube, I was staring into the text, learnig the subject,
then pausing for a while and solving the cube. And I could go like this
for hours and hours. Surprisingly, during the late Summer and Fall
1981, the cubes became finally available in Czech Republic as well. The
cube crazy has officially began. Local championships popped up at high
schools and universities. I always participated in them often with my
friend Ludek. Both of us always left the competition far behind. There was nobody I knew with whom I could compete. I was thus chasing the clock and the world.
In the Winter 1981/82, the Czech magazine
Mlady Svet called for a national championship and people started
submitting their times. In February 1982, the magazine printed a
preliminary table showing the best ten times submitted. And I could not
believe my eyes to see my name on the first place. I also noticed the
name Mirek Goljan who was literallily "breathing on my back". That gave
me more energy for my practicing and I went into the national
championship on May 11, 1982 averaging about 25 seconds with my
personal best of 18. Ten months from time zero.
I won the semifinals and 5 best advanced
into the finals. Among them, Mirek Goljan and my friend Ludek Marek.
The finals were in front of TV cameras. We were allowed to use our own
cubes. The best-of-three time determined the winner. We all solved the
cube at the same time. I won the first and second rounds and Mirek won
the last third round. My second time of 23.55 got me the first place,
Mirek was the second, trailing about 2 seconds, and Ludek ended on the
third place. The first prize was a plane ticket to Budapest to the
first World Championship.
I became a "celebrity" for a few weeks
receiving a lot of letters all asking for one thing - the description
of my system. The letters actually did not have my proper address, just
the name and city, no street address or zip code. They all were
delivered. I decided to publish my system in Mlady Svet. It contained
all algorithms for permutations and orientations and a few moves for
the F2L. Most people were disappointed to learn that the method is
actually quite "complex" requiring a lot of practicing and
memorization. Most expected a simple trick that one can explain in a
few minutes. What did you say about the free lunch? I remember one
really funny story that happened to me on a train when I commuted to
college from my home town. A guy was sitting next to me playing with
the cube. I asked him about his system. He said: "I am using the
Fridrich method." I asked with a surprise in my voice: "You actually
memorized ALL algorithms?" His answer was: "No, that’s too much. I know
only some of them." I replied with: "Well, you need to memorize all of
them otherwise you are not really utilizing its strength." He looked at
me frawning and said with his mouth half open: "Yeah, so what’s your
system?" I answered with a big smile: "I use the Fridrich method, too,
because I am Fridrich." He did not blink an eye, did not say anything
and handed me his messed-up cube. I solved the cube in about 20 seconds
to prove my words and we both laughed at the coincidence.
I was acepted to college and still kept
on improving. Later in 1982, I changed my F2L system to the current
system. Before, I would do the first layer and then insert two cubies
from the last layer into the middle layer. I developed the algorithms
and also algorithms that moved / flipped the cubies in the middle
layer. When I switched to the current system for the F2L, I instantly
improved by several seconds and got my average to around 20 (15 months
from time zero). By 1983, I was consistently averaging 17 seconds. I
knew three more cubers capable of achieving sub-20 averages
consistently. We practiced together. As the cube rage cooled down, I
stopped working on my system. The second Czech Championship took place
in March 1983. Robert Pergl won all three rounds (if I remember
correctly) with a best of 17.04. He was using basically my system but
he knew more than 600 algorithms (I was actively using about 120-150)
and one could say that he was using a "multi-system". From time to
time, he was able to solve the last layer in just one algorithm,
perhaps due to preparing the LL a little before finishing the F2L. And
he stayed cool and psychologically stable during the whole event.
Psyche is a very important factor in championships. There is little
value in being able to solve the cube in 16 seconds on average if the
nerves slow you down to 20 during the competition. You can’t win a big
event unless you work on the psychological factor as well. And Robert
indeed was consulting with a psychologist, preparing very carefully for
the whole year. What can I say - it paid off.
I would dare to say that nothing important happened in speed cubing and cubing in general over the next decade. Then, in 1992 Herbert Kociemba
developed a computer algorithm with a performance very close to the
God’s Algorithm (the shortest moves from any position). It was, in my
opinion, the biggest event in cubing in general. Suddenly, we could
obtain the shortest moves for any position and any pattern.
Surprisingly, Kociemba’s algorithm always seemed to find a solution
within 20 face moves. The famous cube-in-cube pattern turned out to
have an elegant short solution L F L D’B D L² F² D’F'R U’R'F² D as we
suspected for a long time but never found it. Progress has been made in
identifying the farthest positions on the cube (superflip and
supertwist). To give you an idea how revolutionary Kociemba’s discovery
was, the previous best computer solution was always able to solve the
cube within 38 moves, but could not guarantee better (Thistlewaite’s
algorithm). Even though Kociemba’s algorithm did not provide a proof
that the diameter of the cube group is indeed 20 in face counting, it
has been an impressive piece of work, indeed. As the computer speed and
memory increased, optimal solvers came to life, and suddenly, to my opinion, the cube lost much of its enigma.
I put my system in electronic form on the Internet in January 1997 after I had discussions with Mike Pugh on the Cube Lovers mailing list
(one of the oldest mailing lists ever, established in 1980). He
persuaded me that making my system available in electronic form would
be useful for other cubers. I made copies of my old, now yellowish,
notebook and he made those small pictures you now see on my pages. I
included the patter and set up the site. I never put a counter on my
page, so little did I know how popular the system became. Actually, to
be completely honest, I was convinced that nobody in their right mind
will have the energy and will to learn the system in its entirety. I
thought that speedcubing was inactive and not popular enough for
anybody to have the motivation to go through the pain of memorizing the
algorithms. I know now how wrong I was. One should never underestimate
the power of the cube. I still admire those of you who entered the
speedcubing now. Back in 1981, the cube was mysterious. We did not have
computers powerful enough to develop the shortest moves for us. We did
not know if those algorithms we found by trial and error were the best
or shortest. The unknown and unanswered questions were an important
ingredient for many cubers. They were the engine that powered us
forward. I do not intend to sound as an old lady complaining while
recalling the old good days, but I am trying to convey what most of us,
if not all, felt as we were trying to uncover the curtain of secrecy of
the cube.
At the end of 1996, I sent a postcard to
Mirek Goljan and I typed the 14-move algorithm for cube-in-cube and
nothing else on it. Mirek and I have not seen each other for at least
12 years and I was already pursuing my PhD in the US by that time. We
got in touch again via phone and later via e-mail. In 1997 I visited
Czech Republic and after almost 14 years, we started cubing together,
admiring Kociemba’s algorithm, and sharing our personal stories. Mirek
later joined SUNY Binghamton and pursued his PhD degree in the same
field as me - steganography and digital watermarking. We became
professional colleagues and today we work together on puzzles of data
hiding and discovering them in digital images. After 14 years, our
journeys joined again - two top Czech speed cubers uncovering the
secrets of images.
That’s all folks. Thanks for reading!
