Bits — the daily deduction game, board

bits by biti by bit

You already know

This rules out of the 64 before you start. You have chips.

No timer. Your progress is saved — you can leave and come back.

–Could be it
–Chips left
0.00Bits wasted

Board

Build a question

What the chips mean

One number in sixty-four

The board is the numbers 1 to 64. One of them is today's number, and the given has already ruled some out.

  1. Build a yes/no question from the chips — one chip, or two joined by AND, OR or XOR, either side negatable with NOT.
  2. The board shows what your question would catch before you ask it, and the readout tells you the best split available at that price.
  3. Ask. Every number on the wrong side of the answer is struck out.
  4. Declare the number when you're ready — you confirm before anything is final.

Each chip can be spent once. A two-chip question spends two, so a 0.95-bit single chip against a 1.000-bit pair is a real trade. Today's board can be guaranteed in eight chips and you have nine, so there is exactly one chip of slack.

You are scored on the questions, not the answer. A question that catches half the survivors is worth a full bit; a lopsided one is worth less. Each turn you are charged the difference between the best question available at the price you paid and the one you asked — so being economical is never punished. The answers you happen to get never change your score.

A chip buys at most one bit however many you spend at once, so the numbers still alive tell you the fewest chips you could possibly need. Once that passes the chips in hand you'll finish with a shortlist and pick from it — the board still counts.