A QUIET GAME OF TWO MEMORIES
Follow a bird through the reeds and a letter through time. Spot either one returning exactly N turns ago.
WELCOME TO THE HIDE
Learn with eight unhurried turns. Watch where the kingfisher lands and read or listen to the letter.
Start with the guided practice, or choose your challenge.
FIELD NOTES
Your best rounds stay on this device.
FIELD GUIDE
Every turn, a kingfisher appears in one of eight places and a letter is spoken or shown in the center. Compare each signal with the one exactly N turns ago, not just any earlier turn.
At 1-back, compare with the previous turn. At 2-back, skip the previous turn and compare with the turn before it. The first N turns have no earlier partner: don't mark a match yet.
Press A / Position match for the location and L / Letter match for the letter. You may select either, both, or neither. Press again to undo a selection before the turn ends. Space advances self-paced play; P pauses. On a timed challenge, answers lock when its progress bar empties.
Practice gives immediate explanations. Challenges contain 20+N turns, exactly six matches per channel, and two turns where both match. At the end, see your hits, misses and false alarms.
Score is hit rate minus false-alarm rate, averaged across both channels. Guessing everything cannot earn a good score. Above 85% suggests a higher N; below 70% suggests a lower N. This is a game, with no promised cognitive benefit.
All game code and artwork load locally. Optional speech uses an installed local English voice; captions are used if none is available. Code: Jonathan Perry-Houts, GPL-3.0-or-later; adapted into this interface.