Compete · Improve · Belong

The next generation of competitive stacking

Fast matchmaking. Precise controls. Serious competition. Play ranked, rooms, and solo modes in the browser.

RANKED 1V1 Best of 5

NovaStack 2,354

HOLD

LINES24

TIME0:47

VS

GARBAGE 6

PixelPusher 2,201

HOLD

LINES22

TIME0:47

Ranked 1v1Skill-based matchmaking

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Opener

TKI / T-Spin Single

Build a T-slot early with J/L + overhang. First T into the pocket for a TSS, then continue the stack.

1 / 8

MAPS

Cheese dig layouts — clear the map as fast as you can.

MEDALS

THIN EDITOR

10-wide rows · use . empty · G garbage · 5–18 rows

Name Rows (one per line)

Community

Player profile

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Learn

Guide

Rules, stats, and how a match is played.

Attack flow: Clear → Calc → Cancel → Send → Bar — Versus pipeline — what happens when you clear lines

In one sentence You clear → STACKR computes attack → cancels your incoming first → leftover hits opponents’ garbage bar → after the delay, armed lines appear on their board when they lock a piece.

You never attack yourself If lines rise right after you clear, that was incoming garbage that was already armed — your clear cancelled some of it, and the rest injected on that lock. Watch the left meter (yellow → red). Clear while it’s filling to CANCEL; leftover power is SENT to enemies.

Why the bar comes before the board The side meter is a preview queue. That delay (default 500 ms) exists so you can cancel with your own clears. Instant inject would remove that skill.

Base attack (before combo / B2B)

Clear	Normal	T-Spin / Spin	Mini
Single	0	2	0
Double	1	4	1
Triple	2	6	0
Quad	4	—	—

A difficult clear (feeds B2B) = any spin clear, or a Quad.

After base (Battle / Team)

Apply combo multiplier (see Combo tab).
If this clear continues B2B → +1 attack.
If B2B breaks and surge was charged → add surge size.
Margin: +1 attack per 90s of match time.
All Clear (empty board) → +10 attack (+2 B2B streak levels).
Garbage special (quad/spin while clearing garbage) → +1.

Then cancel / send Attack first cancels your pending garbage (1:1, or 2× in opener / volatile). Remainder is sent (split into chunks by Attack split, default 4). Passthrough skips cancel.

Solo scoring note Sprint / Blitz / Zen use a classic additive combo table and ×1.5 B2B on big clears — different from Battle’s combo multiplier. Score still uses Guideline-ish line values × level.

Combo multiplier formula — Battle / Team combo formula (from the engine)

What is a combo? A combo is a chain of clears without a no-clear lock in between. comboBefore = how many clears you already did in this chain (0 on the first clear of the chain). After a clear, displayed combo becomes comboBefore + 1 (e.g. “COMBO x3”).

Worked examples (Battle)

Clear	comboBefore	Base	Attack
Double	0	1	floor(1×1.00) = 1
Double	4	1	floor(1×2.00) = 2
Quad	0	4	4
Quad	4	4	floor(4×2.00) = 8
T-Spin Double	2	4	floor(4×1.50) = 6
Single (base 0)	3	0	floor(log(1+3.75)) ≈ 1

B2B (Back-to-Back) Doing difficult clears back-to-back raises the B2B streak. The second difficult clear in a row (and later ones) get the B2B label and +1 attack. A normal Single/Double/Triple with no spin breaks the streak.

Surge When B2B streak ≥ 4, surge charge = streak size. Breaking B2B with a non-difficult clear dumps that charge into attack (big spike). Keep chaining Quads / T-spins to grow it; dump on purpose or by accident.

Sprint Clear a line goal (20–100) as fast as possible. PB saved locally; cloud when signed in.

Cheese Race Board starts with garbage. Dig it all. Messiness = how often holes shift.

Survival Cheese rises on a timer. Last player alive wins.

Diff	Rise	Gravity
Easy	every 1.6s	off
Normal	every 1.0s	off
Hard	every 0.7s	mild
Expert	every 0.45s	high

Online Survival uses the room’s rise setting instead of these solo presets.

Blitz 2-minute score attack. Combos, B2B, and All Clears score big.

Zen No timer / KO pressure. Undo, redo, inject cheese, gravity override.

Battle / Team Battle Full attack system above. FFA last standing, or Red vs Blue. Optional series (bo3 / bo5 / bo7).

Race (online) First to the line goal. Enable Same seed so everyone shares the bag.

Play HUD

Stat	Meaning
ATK	Lines you successfully sent
RECV	Lines you received
APM	Attack per minute (not key presses)
PPS	Pieces per second
GARBAGE	Your pending bar total
COMBO / B2B / SURGE	Current chain state
VS	~100 × (attack + downstack) / seconds
KPP / Finesse	Keys per piece · misdrop faults

Room rule presets Casual (slower bar), Competitive (500 ms), Cheese (dirty + volatile), Slow (easy handling). Tune messiness, opener pieces, gravity, lock delay, multiplier, split, passthrough, same seed.

Account

Sign in to keep your rank, binds, and replays.

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Sign in for ranked & rooms — or try Sprint / Zen below.

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PLAYERS / RANK LADDER

Rating updates from Battle & Team multiplayer while signed in. Solo PBs are under History → Cloud Boards.

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Compete · Ranked

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Climb the ranks, track your progress, and compete with the best.

RankPlayerRatingWinsWin %

Progress

XP, streaks, and badges come from playing. Rank stays on the ladder.

Account

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XP

Daily streak

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Replays

Recent runs, cloud boards, and saved replays.

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Play · Compete · Improve · Belong

What do you want to play?

Jump into a match, create a room, or try a solo challenge.

Competitive

Climb the ladder.

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Beat your own records.

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Guest modes Sprint, Zen

Account modes All modes and ranked

SPRINT

PB for 40L: —

CHEESE RACE

Height Classic (10) Tall (18) Infinite dig 100-line dig

SURVIVAL

Difficulty Easy Normal Hard Expert

Cheese rises every 1.0s · gravity off

SCORE

0

LINES

0

LEVEL

1

TIME

0:00.000

BEST

—

More stats

COMBO

—

B2B

—

SURGE

—

GARBAGE

0

PPS

0.00

APM

0

FINESSE

—

ATK

0

RECV

0

KPP

—

VS

0.0

The next generation of competitive stacking

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TKI / T-Spin Single

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