Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Catch the Wave
Table title:
2010
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=2 rowspan=1 > Rival </th><th colspan=2 rowspan=1 > Visual Technical </th><th colspan=2 rowspan=1 > Young </th></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Ayumi Kurihara </th><th colspan=1 rowspan=1 > 6 </th><th class="highlighted"  colspan=1 rowspan=1 > Yumi Ohka </th><th colspan=1 rowspan=1 > 5 </th><th class="highlighted"  colspan=1 rowspan=1 > Ryo Mizunami </th><th colspan=1 rowspan=1 > 6 </th></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Cherry </th><th colspan=1 rowspan=1 > 5 </th><th class="highlighted"  colspan=1 rowspan=1 > Kana </th><th colspan=1 rowspan=1 > 5 </th><th class="highlighted"  colspan=1 rowspan=1 > Io Shirai </th><th colspan=1 rowspan=1 > 6 </th></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Asami Kawasaki </th><th colspan=1 rowspan=1 > 4 </th><th class="highlighted"  colspan=1 rowspan=1 > Gami </th><th colspan=1 rowspan=1 > 4 </th><th class="highlighted"  colspan=1 rowspan=1 > Misaki Ohata </th><th colspan=1 rowspan=1 > 6 </th></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Shuu Shibutani </th><th colspan=1 rowspan=1 > 4 </th><th class="highlighted"  colspan=1 rowspan=1 > Toshie Uematsu </th><th colspan=1 rowspan=1 > 4 </th><th class="highlighted"  colspan=1 rowspan=1 > Sawako Shimono </th><th colspan=1 rowspan=1 > 2 </th></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Moeka Haruhi </th><th colspan=1 rowspan=1 > 1 </th><th class="highlighted"  colspan=1 rowspan=1 > Mio Shirai </th><th colspan=1 rowspan=1 > 2 </th><th class="highlighted"  colspan=1 rowspan=1 > Senri Kuroki </th><th colspan=1 rowspan=1 > 0 </th></tr>
</table>
Question:
How is the game, Catch the Waves played?
Answer:
Catch the Wave includes fifteen participants split up into three blocks titled Rival, Visual Technical and Young.