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2. Hockey-stick identity - Wikipedia

   en.wikipedia.org/wiki/Hockey-stick_identity

   Pascal's triangle, rows 0 through 7. The hockey stick identity confirms, for example: for n =6, r =2: 1+3+6+10+15=35. In combinatorics , the hockey-stick identity , [ 1 ] Christmas stocking identity , [ 2 ] boomerang identity , Fermat's identity or Chu's Theorem , [ 3 ] states that if n ≥ r ≥ 0 {\displaystyle n\geq r\geq 0} are integers, then

3. Pascal's rule - Wikipedia

   en.wikipedia.org/wiki/Pascal's_rule

   In mathematics, Pascal's rule (or Pascal's formula) is a combinatorial identity about binomial coefficients.It states that for positive natural numbers n and k, + = (), where () is a binomial coefficient; one interpretation of the coefficient of the x k term in the expansion of (1 + x) n.

4. Neutral zone trap - Wikipedia

   en.wikipedia.org/wiki/Neutral_zone_trap

   The most recognizable implementation of the trap sees the defense stationing four of their players in the neutral zone and one forechecker in the offensive zone. As the offensive team starts to move up the ice, the forechecker (generally the center) will cut off passing lanes to other offensive players by staying in the middle of the ice, forcing the puck carrier to either sideboard.

5. Ice hockey stick - Wikipedia

   en.wikipedia.org/wiki/Ice_hockey_stick

   An ice hockey stick is a piece of equipment used in ice hockey to shoot, pass, and carry the puck across the ice. Ice hockey sticks are approximately 150–200 cm long, composed of a long, slender shaft with a flat extension at one end called the blade. National Hockey League (NHL) sticks are up to 63 inches (160 cm) long. [1]

6. Pass (ice hockey) - Wikipedia

   en.wikipedia.org/wiki/Pass_(ice_hockey)

   The function of passing in ice hockey during gameplay strongly resembles the role of passing in other goal sports such as soccer and lacrosse. Passing (along with skating, shooting, and stick handling) is one of the most fundamental skills in hockey. An effective pass is described as being "stick to stick" or "tape to tape", referring to the ...

7. Ice hockey goaltending equipment - Wikipedia

   en.wikipedia.org/wiki/Ice_hockey_goaltending...

   Currently, ice hockey regulations require that leg pads be no wider than 11 inches (28 cm) and can be no longer than 38 inches (97 cm). The NHL has also brought in rules stating that each goaltender will be measured for height, and then the height of allowable pads will be calculated in proportion to the height of the goaltender.