"even chance" meaning in English

{
  "forms": [
    {
      "form": "even chances",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "even chance (plural even chances)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "fat chance"
        }
      ],
      "glosses": [
        "A chance in which success is just as likely as failure."
      ],
      "hypernyms": [
        {
          "word": "chance"
        },
        {
          "word": "possibility"
        }
      ],
      "id": "en-even_chance-en-noun-ULRMn6zA",
      "links": [
        [
          "chance",
          "chance#Noun"
        ],
        [
          "success",
          "success"
        ],
        [
          "failure",
          "failure"
        ]
      ],
      "related": [
        {
          "word": "as likely as not"
        },
        {
          "word": "as often as not"
        },
        {
          "word": "fifty-fifty"
        }
      ]
    }
  ],
  "word": "even chance"
}

{
  "forms": [
    {
      "form": "even chances",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "even chance (plural even chances)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "as likely as not"
    },
    {
      "word": "as often as not"
    },
    {
      "word": "fifty-fifty"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "coordinate_terms": [
        {
          "word": "fat chance"
        }
      ],
      "glosses": [
        "A chance in which success is just as likely as failure."
      ],
      "hypernyms": [
        {
          "word": "chance"
        },
        {
          "word": "possibility"
        }
      ],
      "links": [
        [
          "chance",
          "chance#Noun"
        ],
        [
          "success",
          "success"
        ],
        [
          "failure",
          "failure"
        ]
      ]
    }
  ],
  "word": "even chance"
}