dohyo-iri.js

// Note: gets number of matches played as yokozuna on a rikishi's page,
// e.g. http://sumodb.sumogames.de/Rikishi.aspx?r=1123.
// Does not count fusenpai.
console.log([...document.querySelectorAll('.rikishi tr')].flatMap(tr => {
  const tds = tr.querySelectorAll('td')
  if (tds.length === 0) return 0
  const rank = tds[1].innerText.trim()
  if (!rank.startsWith('Y')) return 0
  const hoshi = [...tds[2].querySelectorAll('img')].map(img => {
    const src = img.getAttribute('src')
    // Only matches that were actually played, since they include dohyo-iri.
    if (src.includes('hoshi_shiro') || src.includes('hoshi_kuro') || src.includes('hoshi_fusensho')) {
      return 1
    }
    return 0
  })
  return hoshi
}).reduce((n, item) => n + item, 0))