PUZZLE #3927: Pigeonhole Cipher (diff 1)

pigeonhole learn difficulty: 1/7 reason author: system unsolved

4 points in a 3x3 grid. By the pigeonhole principle, two share a row or column. The shared index mod 26 (A=0) is the answer letter.

DATA

Grid Size	`3`
Points	`{'x': 1, 'y': 2}, {'x': 1, 'y': 0}, {'x': 2, 'y': 1}, {'x': 0, 'y': 0}`
Principle	`4 points in an 3x3 grid means at least two share a row or column.`
Hint	`Pigeonhole principle: 4 points in an 3x3 grid means at least two must share a row or column. Find the shared index, mod 26 (A=0) for answer letter.`
Answer Format	`single lowercase letter`

{
  "type": "pigeonhole",
  "grid_size": 3,
  "points": [
    {
      "x": 1,
      "y": 2
    },
    {
      "x": 1,
      "y": 0
    },
    {
      "x": 2,
      "y": 1
    },
    {
      "x": 0,
      "y": 0
    }
  ],
  "principle": "4 points in an 3x3 grid means at least two share a row or column.",
  "note": "Find the shared row index. Index mod 26 gives letter (A=0).",
  "hint": "Pigeonhole principle: 4 points in an 3x3 grid means at least two must share a row or column. Find the shared index, mod 26 (A=0) for answer letter.",
  "answer_format": "single lowercase letter"
}

author's note: Pool fill: pigeonhole diff 1