GUT/CHECK
SYS NOMINAL · CHECK #142
PLAY TODAY'S CHECK
DAILY INSTINCT CALIBRATION

GUT/CHECK

Five instruments. Sixty seconds. One verdict.

A daily instinct-calibration game. Everyone on Earth gets the identical five challenges each day. Score out of 500, get your rating, share the grid. How sharp is your gut, really?

PLAY TODAY'S CHECK SEE ALL 50 INSTRUMENTS
≈60 SECONDS 5 ROUNDS NO ACCOUNT
PRIMARY GAUGE · CALIBRATION READOUT LIVE
000 500
TODAY · SCORE
412
VERDICT
SURGEON
STREAK
07
[ §0 ] What It Is READ FIRST

What is GUT CHECK?

GUT CHECK is a free daily puzzle game, a daily ritual in the spirit of Wordle. Each day, five instruments are drawn from a pool of 50 and dealt to every player on Earth in identical form, seeded from the date. Each one tests a different sense: draw an angle by feel, fill a vessel to a target percentage, find a line's true midpoint, count dots from a one-second flash, stop a hidden timer. A full run takes about sixty seconds. Every round scores 0 to 100, the five sum to a score out of 500, and the needle settles on a verdict from RECALIBRATE to MACHINE.

A solo project by Amrudin Catic. It runs entirely in your browser, needs no account, and stores nothing on a server.

How a daily check works

  1. Five instruments are dealt from the bank of 50, the same five for everyone, every day.
  2. Each gives you one task: draw, fill, find, count, or stop. Respond by feel, then lock it in.
  3. Score out of 500, read your verdict, share the grid. Come back tomorrow for a fresh five.
≈60 SECONDS · 5 ROUNDS · NO ACCOUNT · WORDLE-STYLE SHARE
[ §1 ] The Instrument Bank 50 IN BANK · 5 A DAY
► Tap any instrument to practice it free: unlimited tries, never counts toward your daily.
▶ PRACTICE
MODULE 01
Angle
Draw an exact angle by feel. Drag out from the pivot and trust the gut.
52°
▶ PRACTICE
MODULE 02
Fill
Fill the vessel to an exact percentage. Stop when it feels right.
64%
▶ PRACTICE
MODULE 03
Midpoint
Tap the true middle of the line. No marks, no guides. Just balance.
Δ 7px
▶ PRACTICE
MODULE 04
Flash Count
Dots appear for one second. Count them before they vanish.
FLASH 1.0s
▶ PRACTICE
MODULE 05
Blind Timer
Stop the hidden clock on the target time. No display. Count it down inside.
TGT 3.20s
▶ PRACTICE
MODULE 06
Balance
Slide the fulcrum to the balance point of two unequal weights. The heavier block sits closer.
PIVOT 38%
▶ PRACTICE
MODULE 07
Span
Draw a line an exact multiple of the reference. Match the ratio by eye.
× 3.0
▶ PRACTICE
MODULE 08
Bisect
Split the angle exactly in half. No protractor. Lay the divider on the bisector.
SPLIT 1/2
▶ PRACTICE
MODULE 09
Reflex
Tap the instant the sweep crosses the mark. One pass. Feel the timing.
TAP ON MARK
▶ PRACTICE
MODULE 10
Area
Size the circle to match the square's area. Equal area, not equal width.
EQUAL AREA
▶ PRACTICE
MODULE 11
Perpendicular
Drop a line at a clean right angle to a tilted reference. Trust the corner.
RIGHT ANGLE
▶ PRACTICE
MODULE 12
Shade
See a gray for a beat, then rebuild it from memory. Pure tone recall.
MATCH THE TONE
▶ PRACTICE
MODULE 13
Tempo
Four pulses set the beat, then you keep it. Hold the tempo by feel.
KEEP THE BEAT
▶ PRACTICE
MODULE 14
Ratio
Cut a bar to a named fraction: a third, two-fifths, the golden cut.
1/3
▶ PRACTICE
MODULE 15
Flick
Flick the puck and let friction carry it to rest inside the zone.
FLICK TO ZONE
▶ PRACTICE
MODULE 16
Rotate
Twist the dial to an exact bearing. No degree marks, just the gut.
240°
▶ PRACTICE
MODULE 17
Hold
Press and hold for an exact span of seconds. The clock goes dark. Feel it.
··· 3.4s
▶ PRACTICE
MODULE 18
Recall
A line flashes, then vanishes. Redraw its exact length from memory.
FROM MEMORY
▶ PRACTICE
MODULE 19
Spinner
Numbers race past. Tap to stop the reel on the target. Anticipate, don't react.
27 STOP ON 27
▶ PRACTICE
MODULE 20
Aim
Set the launch angle and fire. Fixed power. Find the arc that drops it on target.
FIND THE ARC
▶ PRACTICE
MODULE 21
Mirror
Reflect a dot across a tilted axis. Place its mirror image by eye.
REFLECT IT
▶ PRACTICE
MODULE 22
Interval
Two flashes mark out a gap. Reproduce that exact gap with two taps.
TAP THE GAP
▶ PRACTICE
MODULE 23
Estimate
A swarm of dots, too many to count. Estimate the number by feel.
HOW MANY?
▶ PRACTICE
MODULE 24
Speed
A dot sets the pace. Slide until your dot moves at exactly the same speed.
MATCH THE PACE
▶ PRACTICE
MODULE 25
Mean
Two numbers, no number line. Find the value exactly halfway between them.
40 190 ? HALFWAY
▶ PRACTICE
MODULE 26
Parallel
Match a reference line's exact lean. Draw a parallel by eye, no protractor.
SAME LEAN
▶ PRACTICE
MODULE 27
Countdown
A clock falls to zero, then goes dark partway. Tap the instant it hits 0.
0.0 TAP AT ZERO
▶ PRACTICE
MODULE 28
Centroid
Find a shape's balance point, where it would sit level on a pin.
BALANCE POINT
▶ PRACTICE
MODULE 29
Bigger
How many times bigger is one area than another? Judge area, not width.
HOW MANY ×?
▶ PRACTICE
MODULE 30
Percent
Two numbers, no scratch paper. What percent is the first of the second?
35 / 140 ?% ESTIMATE %
▶ PRACTICE
MODULE 31
Trisect
Split a line into three equal parts with two dividers. Thirds by eye.
EQUAL THIRDS
▶ PRACTICE
MODULE 32
Gauge
Read an unlabeled gauge by eye. Where is the needle pointing, 0 to 100?
READ IT
▶ PRACTICE
MODULE 33
Product
Estimate the product of two numbers. Fast and by feel, no scratch paper.
23 × 34 ≈ ? ESTIMATE
▶ PRACTICE
MODULE 34
Pendulum
A bob swings back and forth. Tap the instant it crosses the mark.
TAP ON MARK
▶ PRACTICE
MODULE 35
Level
Set a bar to true horizontal while a tilted frame fights your eye.
TRUE LEVEL
▶ PRACTICE
MODULE 36
Circle
Draw the roundest circle you can, freehand. Scored on how true it runs.
FREEHAND
▶ PRACTICE
MODULE 37
Longer
Two lines. How many times longer is one than the other? Length only.
HOW MANY ×?
▶ PRACTICE
MODULE 38
Lever
Place a weight to balance the lever by torque. Heavier sits closer in.
BALANCE IT
▶ PRACTICE
MODULE 39
Logscale
Place a number on a logarithmic scale from 1 to 1000. Decades, not tenths.
1 · 10 · 100 · 1000
▶ PRACTICE
MODULE 40
Meter
Tap five evenly spaced beats at any tempo. Scored purely on steadiness.
EVEN BEATS
▶ PRACTICE
MODULE 41
Steady
Press a dot and hold it dead still for two seconds. Scored on drift.
HOLD STILL
▶ PRACTICE
MODULE 42
Apex
A shot rises to its peak, then vanishes. Tap where it comes back down.
WHERE IT LANDS
▶ PRACTICE
MODULE 43
Divide
Estimate one number divided by another. Fast, no long division.
340 ÷ 8 ≈ ? ESTIMATE
▶ PRACTICE
MODULE 44
Density
Two equal patches. Add dots to the right until it looks as dense as the left.
MATCH DENSITY
▶ PRACTICE
MODULE 45
Scale
Resize a square to a target multiple of a reference's area. Area, not width.
2× THE AREA
▶ PRACTICE
MODULE 46
Nest
Size a ring to sit exactly between two others. Dead center of the gap.
SPLIT THE GAP
▶ PRACTICE
MODULE 47
React
Wait for the panel to turn red, then tap as fast as you can. Pure reflex.
TAP! ON RED
▶ PRACTICE
MODULE 48
Corners
A many-sided shape flashes for a second. Count its corners from memory.
HOW MANY?
▶ PRACTICE
MODULE 49
Gears
The big gear turns a known angle. Predict where the meshed small one ends up.
MESHED GEARS
▶ PRACTICE
MODULE 50
Fraction
Estimate a named fraction of a whole number: three fifths of 240, by feel.
⅗ of 240 ≈ ? ESTIMATE
[ §2 ] Scoring & Verdict SCALE 0-500

One run. Five readings.

Each round is scored 0-100 on how close your instinct lands to the day's hidden target. The five readings sum into a single calibration score. The needle settles, and the panel hands down a verdict.

412/ 500
82% CALIBRATED · VERDICT: SURGEON
ANGLE
94
FILL
88
MIDPOINT
79
FLASH
71
TIMER
80
TOTAL
412

The verdict ladder

Where the needle lands names your gut. Climb from RECALIBRATE to MACHINE. Most careful humans settle in the middle, with room to sharpen.

95-100% MACHINE
85-94% SURGEON
70-84% CALIBRATED
55-69% HUMAN
40-54% FOGGY
< 40% RECALIBRATE
[ §3 ] The Share Artifact COPY · PASTE · SPREAD
[ §4 ] One Day. One Check. GLOBAL SYNC
SEEDED FROM THE DATE · WORDLE CONVENTION

Everyone on Earth gets the same five challenges.

The day's targets are seeded from the date, identical for every player, everywhere. No edge, no do-overs. You get one run. Come back tomorrow for a fresh five.

NEXT CHECK IN
07:42:15
RESETS AT LOCAL MIDNIGHT
CHECK #142 · IS LIVE

CALIBRATE YOUR
INSTINCTS.

≈60 seconds · 5 rounds · no account · no tracking

PLAY TODAY'S CHECK