Complex sentence: In those last few yards of the lengthy field (an area called the "calx", Latin for chalk), a player can earn a "shy" (worth one point) by lifting the ball against the wall with his foot.
Split into simpler sentences: In those last few yards of the field is an area called the "calx". In this area a player can earn a "shy" (worth one point) by lifting the ball against the wall with his foot.