ReplayUnderstand

Every match
is evidence.

A match is a seed and a list of actions, so it can be played again exactly. Replay steps through it event by event, names the rule behind each one, forks what-ifs and checks that the result still hashes the same.

Step through a match Break-It Lab

LiveRe-executed in your browser

Scrub, fork,
compare.

If you played a match on the Table, it’s here. Otherwise this is a sample bot match on your current rules. Fork at any step to see how the game would end under the ruleset in Studio now.

Sample match · seed 1208

ruleset v0.4.0 · 29 actions · 100 events · Seat 1 wins

Re-executed from seed + actions

step 29/29 · turn 15 · 24ed9663

Seat 20/12

4Ironback31

1Spark Imp11

2Lane Runner31

Seat 14/12

Seat 1 ended the turn. Combat resolved.

Cinder Drake dealt 4 to Ironback.§3.1
Ironback dealt 3 to Cinder Drake.§3.1
Cinder Drake was destroyed.§3.3
Spark Imp dealt 1 to Seat 2’s Keep.§3.1
Seat 1 wins.§6.1

What if, from here?

Fork step 29 and let two ghost seats finish the match under the ruleset that is in Studio now (v0.4.0).

Event log to step 29

Seat 1 wins.§6.1
Spark Imp dealt 1 to Seat 2’s Keep.§3.1
Cinder Drake was destroyed.§3.3
Ironback dealt 3 to Cinder Drake.§3.1
Cinder Drake dealt 4 to Ironback.§3.1
Seat 1 drew Ironback.§2.2
Turn 15: Seat 1 has 5 energy.§2.1
Seat 2 played Ironback to the left lane.§2.3
Seat 2 drew Ironback.§2.2
Turn 14: Seat 2 has 5 energy.§2.1
Sniper Owl was destroyed.§3.3
Sniper Owl dealt 2 to Cinder Drake.§3.1
Cinder Drake dealt 4 to Sniper Owl.§3.1
Seat 1 played Lane Runner to the right lane.§2.3
Ironback was destroyed.§3.3
Spark Imp dealt 2 to Ironback.§4.1
Seat 1 played Spark Imp to the center lane.§2.3
Seat 1 drew Bloom Wisp.§2.2
Turn 13: Seat 1 has 5 energy.§2.1
Mender was destroyed.§3.3
Mender dealt 2 to Ironback.§3.1
Ironback dealt 3 to Mender.§3.1
Cinder Drake was destroyed.§3.3
Ironback was destroyed.§3.3
Ironback dealt 3 to Cinder Drake.§3.1
Cinder Drake dealt 4 to Ironback.§3.1
Sniper Owl dealt 2 to Seat 1’s Keep.§4.4
Seat 2 played Sniper Owl to the left lane.§2.3
Seat 2 drew Shieldbearer.§2.2
Turn 12: Seat 2 has 5 energy.§2.1
Cinder Drake dealt 4 to Ironback.§3.1
Ironback dealt 3 to Cinder Drake.§3.1
Cinder Drake dealt 4 to Seat 2’s Keep.§3.1
Mender healed Ironback for 2.§5.1
Seat 1 played Mender to the right lane.§2.3
Seat 1 drew Spark Imp.§2.2
Turn 11: Seat 1 has 5 energy.§2.1
Ironback dealt 3 to Seat 1’s Keep.§3.1
Cinder Drake dealt 1 to Ironback.§4.3
Cinder Drake dealt 1 to Cinder Drake.§4.3
Seat 2 played Cinder Drake to the center lane.§2.3
Seat 2 drew Sniper Owl.§2.2
Turn 10: Seat 2 has 5 energy.§2.1
Shieldbearer was destroyed.§3.3
Ironback dealt 3 to Shieldbearer.§3.1
Shieldbearer dealt 1 to Ironback.§3.1
Ironback dealt 3 to Seat 2’s Keep.§3.1
Shieldbearer was destroyed.§3.3
Mender was destroyed.§3.3
Cinder Drake dealt 1 to Ironback.§4.3
Cinder Drake dealt 1 to Shieldbearer.§4.3
Cinder Drake dealt 1 to Mender.§4.3
Seat 1 played Cinder Drake to the left lane.§2.3
Seat 1 drew Lane Runner.§2.2
Turn 9: Seat 1 has 5 energy.§2.1
Ironback dealt 3 to Shieldbearer.§3.1
Shieldbearer dealt 1 to Ironback.§3.1
Mender dealt 2 to Seat 1’s Keep.§3.1
Seat 2 played Ironback to the right lane.§2.3
Seat 2 drew Lane Runner.§2.2
Turn 8: Seat 2 has 4 energy.§2.1
Shieldbearer dealt 1 to Seat 2’s Keep.§3.1
Sniper Owl was destroyed.§3.3
Mender dealt 2 to Sniper Owl.§3.1
Sniper Owl dealt 2 to Mender.§3.1
Seat 1 played Ironback to the center lane.§2.3
Seat 1 drew Ironback.§2.2
Turn 7: Seat 1 has 4 energy.§2.1
Shieldbearer dealt 1 to Seat 1’s Keep.§3.1
Mender healed Mender, which was already at full health.§5.1
Seat 2 played Mender to the left lane.§2.3
Seat 2 drew Ironback.§2.2
Turn 6: Seat 2 has 3 energy.§2.1
Shieldbearer dealt 1 to Seat 2’s Keep.§3.1
Sniper Owl dealt 2 to Seat 2’s Keep.§4.4
Seat 1 played Sniper Owl to the left lane.§2.3
Seat 1 drew Shieldbearer.§2.2
Turn 5: Seat 1 has 3 energy.§2.1
Spark Imp was destroyed.§3.3
Shieldbearer dealt 1 to Spark Imp.§3.1

Break-It LabPlaytesting at scale

A thousand games
before lunch.

Choose how many games, press the button and watch the count. Findings name the rule involved and offer a fix. Apply it, run again, and the history table shows whether it helped.

ruleset v0.4.0 · seeds 1,000–2,999 · ghost seat vs ghost seat

0/ 2,000 games played

Version compareComing to Replay

Two rulesets,
one diff.

Replay compares versions: the same seeds under v0.4.2 and v0.4.3, side by side, with the rule changes that explain the difference.

replay · compare v0.4.2 ↔ v0.4.3On the roadmap

v0.4.2

first seat 61.7%

§2.2 The first player does draw on their first turn.

v0.4.3

first seat 50.1%

§2.2 The first player does not draw on their first turn.

The percentages are real: seeds 1,000–2,999 on this site’s engine. Reproduce them in the Lab: rule on A-1, apply both seat-balance fixes and run 2,000 games.

Scrub, fork,compare.

What if, from here?

A thousand gamesbefore lunch.

Two rulesets,one diff.

Scrub, fork,
compare.

A thousand games
before lunch.

Two rulesets,
one diff.