[29种不同的系鞋带的方法]lacing.doc

29 Different Ways To Lace Shoes My lacing diagrams are all colour-coded to make it easier to follow where the lace runs. Generally, the grey section is the start of the lacing, whilst the blue end of the lace starts on the left side and the yellow end starts on the right side. The colours were chosen to make it relatively easy even for colour-blind visitors, as blue is darker than yellow. How many possible ways are there to lace an average shoe? This simple question, when answered with mathematics, results in some surprisingly big numbers - on an average shoe with six pairs of eyelets, there are 1,961,990,553,600 ways to feed a shoelace though those 12 eyelets. Thats almost 2 TRILLION possibilities! However, many of these cant be considered Lacing Methods because they dont even fulfil the primary purpose of holding the shoe closed, whilst many are hopelessly tangled messes, and many are minor, irrelevant variations. Nonetheless, even with real-world constraints (see below), there are countless possible lacing methods. In this section, Ill present a (somewhat more realistic) few methods that I consider worthy of devoting the time required to create instructions, either because they have a particular benefit or just because I like the way they look. Packed up by Woo From: HYPERLINK http:\\ 2 Trillion Possibilities? It hardly seems possible that there could be quite that many ways to feed a lace through 12 eyelets! So lets look at the mathematics: Feed through one of 12 eyelets from either inside or outside. Thats 24 possible ways to start. Continue through one of 11 remaining eyelets from either inside or outside (x 22 more ways). Then 10 remaining eyelets (x 20 more ways). Weve only gone through three eyelets and were already up to 24 x 22 x 20 = 10,560 ways! By the time we reach the last eyelet (x 2 more ways), the possible ways have multiplied to 24 x 22 x 20 x 18 x 16 x 14 x 12 x 10 x 8 x 6 x 4 x 2 ways, a staggering total of almost 2 TRILLION possibi