I'm guessing this will come across as two questions, but their interrelation is important...

Is there a specific word for the game where you toss a horseshoe at a peg (in English just called horseshoes)?

Obviously a literal translation would be 蹄鉄｛ていてつ}, but would a native speaker understand it in context of the game, i.e. 蹄鉄を遊ぶ or 蹄鉄やろう, or in an even more complex context such as "'close enough' only counts in horseshoes," even if they weren't directly aware of the English idiom, such as:

```
いい線とは蹄鉄と州榴弾しか関係ない。

```

("Close enough only matters with horseshoes and hand grenades")

Or perhaps:

```
「ほとんど」とは蹄鉄と手榴弾しか関係ない。

```

("'Almost' only matters with horseshoes and hand grenades")

Note that I'm not looking for a similar idiom in Japanese, I'm looking for a direct translation of the English, even if it sounds awkward, so long as the listener knows about the game horseshoes and that being close but missing still counts. 

**EDIT:**

Based on the answers given so far, I've come up with the following dialog for two characters in a story and would like to know if it makes sense:

```
 「あのつちぐもにほとんど食われそうだったのにあんたいい機嫌だよね、カレン。」

 「アメリカではとあることわざがある。ほとんどって言葉はホースシューズと手榴弾の場合でしか関係ない。
　まぁ、翻訳で少し何かがなくしたかもね。。。」とカレンは頑張って訳試して見た。

 「骨子ぐらい分かったわよ。つまり、いくら惜しくても外れは外れ
   当たらなければ何にもならないってことか？」とのぞみは答えた。

 「そう、そう！何が起こったことでもあろうと、あの化け物に食われなかったら問題なし！」

```