bitrush

Select the target as fast as you can. Targets are drawn uniformly at random, so every correct hit carries log2(N − 1) bits and every mistake cancels a hit. One 60-second scored run per attempt.

Past runs →

QWERTY tape

tape-qwerty

N = 27 · 4.70 bits/hit

Type a random a–z + space stream, typing-test style, with 8 letters of lookahead.

Letters tape

tape-letters

N = 26 · 4.64 bits/hit

The QWERTY tape without space: 26 letters only.

Home-row lanes

lanes-home

N = 9 · 3.00 bits/hit

Self-paced rhythm lanes: A S D F | space | J K L ;, one finger per lane, thumbs on space.

Eight lanes

lanes-8

N = 8 · 2.81 bits/hit

The home-row lanes without the space lane: eight fingers, eight lanes.

3×3 grid

grid-3x3

N = 9 · 3.00 bits/hit

A dot in a staggered 3×3 grid maps to Q W E / A S D / Z X C: position is the key.

Dual 3×3 grids

grid-dual

N = 18 · 4.09 bits/hit

Two staggered grids, one per hand: Q W E / A S D / Z X C and U I O / J K L / M , .

Numpad

numpad

N = 9 · 3.00 bits/hit

A true 3×3 grid on 7 8 9 / 4 5 6 / 1 2 3. Numpad or digit row both work.

Color keys

color-keys

N = 8 · 2.81 bits/hit

Targets are color blocks only, mapped to A S D F J K L ;. Tests whether color-only cues are fast.

Chords

chord

N = 36 · 5.13 bits/hit

Home-row keys alone or in pairs (8 + 28 = 36 symbols). More bits per hit, fewer hits.

Dual stream

dual-stream

N = 8 · 2.81 bits/hit

The same i.i.d. home-row stream, displayed as one queue per hand to encourage alternation.

MIDI keyboard

midi

N = 8 · 2.81 bits/hit

Eight white keys from middle C (Web MIDI). Requires a MIDI keyboard and Chrome or Edge.

Gamepad

gamepad

N = 8 · 2.81 bits/hit

D-pad plus four face buttons = 8 symbols, via the Gamepad API. Press any button to connect.