Canonical station rotation 18×6×6

Eighteen participants rotate through six named stations while squared penalties discourage missed station visits and repeated encounters.

Open in GroupMixer Results

18 people6 groups6 sessions60s limit8 CPUs

Scenario ID: internal.station-rotation-18p-6g-6s.v1
Problem hash: sha256:ef66fce7b6013bba70255d619aa2ce7901a4be3cf93a2744a9f3689016f8b95b

Comparator results

publication r20

Barasu-kun

Unsupported

valid —best —median —

Configuration

barasu-kun-0586a3f-sequential-v1

evidence r2 · unsupported

The live product cannot express named-station visit-count targets.

GolfSoftware Play All

Unsupported

valid —best —median —

Configuration

golfsoftware-play-all-live-55-second-v1

evidence r2 · unsupported

The live product cannot express named-station visit-count targets.

Good-Enough Golfers

Unsupported

valid —best —median —

Configuration

unsupported-group-visit-counts

evidence r2 · unsupported

The product cannot express canonical per-station visit-count targets.

GroupMixer

Optimal

valid 5/5best 0median 0

Configuration

browser-auto-8-defaults-v1

evidence r19 · eligible

Measured 11 October 2026 on an Intel Core Ultra 9 386H; eight pinned CPUs, 8 GiB physical memory, swap disabled. Current production browser Auto, eight requested lanes, automatic Extreme handoff and default CP-SAT admission.

Gurobi

Unavailable

valid —best —median —

Configuration

unavailable-license

evidence r2 · unavailable

No runnable licensed environment and reproducible formulation are available for v1.

Halftime Team Pairings

Unsupported

valid —best —median —

Configuration

halftime-team-pairings-live-sequential-last-six-v1

evidence r2 · unsupported

The visible workflow cannot express canonical named-station visit-count targets.

Hexaly

Unavailable

valid —best —median —

Configuration

unavailable-license

evidence r2 · unavailable

No runnable licensed environment and reproducible formulation are available for v1.

IIENSTITU Random Group Generator

Unsupported

valid —best —median —

Configuration

iienstitu-live-avoid-history-seeded-v1

evidence r2 · unsupported

The visible workflow cannot express canonical named-station visit-count targets.

Optimal Group Generator

Unsupported

valid —best —median —

Configuration

optimal-group-generator-live-fixed-ga-sequential-v1

evidence r2 · unsupported

The live product cannot express named-station visit-count targets.

Google OR-Tools CP-SAT

Optimal

valid 5/5best 0median 0

Configuration

ortools-cpsat-case-formulations-v1:station-rotation-zero-target-v3

evidence r19 · eligible

Measured 11 October 2026 on an Intel Core Ultra 9 386H; eight pinned CPUs, 8 GiB physical memory, swap disabled. Frozen case-specific OR-Tools 9.15.6755 formulation and parameters.

Social Golfer Online

Unsupported

valid —best —median —

Configuration

unsupported-group-visit-counts

evidence r2 · unsupported

The product cannot express canonical per-station visit-count targets.

Teach Arcade Group Maker

Unsupported

valid —best —median —

Configuration

teach-arcade-live-roundrobin-sequential-history-v1

evidence r2 · unsupported

The visible workflow cannot express canonical named-station visit-count targets.

TourneyCard Golf Randomizer

Unsupported

valid —best —median —

Configuration

unsupported-group-visit-counts

evidence r2 · unsupported

The product cannot express canonical per-station visit-count targets.

Comparator status, attempts, score, and configuration
Tool	Status	Valid	Best	Median	Evidence
Barasu-kun	Unsupported	—	—	—	Configuration `barasu-kun-0586a3f-sequential-v1` evidence r2 · unsupported The live product cannot express named-station visit-count targets.
GolfSoftware Play All	Unsupported	—	—	—	Configuration `golfsoftware-play-all-live-55-second-v1` evidence r2 · unsupported The live product cannot express named-station visit-count targets.
Good-Enough Golfers	Unsupported	—	—	—	Configuration `unsupported-group-visit-counts` evidence r2 · unsupported The product cannot express canonical per-station visit-count targets.
GroupMixer	Optimal	5/5	0	0	Configuration `browser-auto-8-defaults-v1` evidence r19 · eligible Measured 11 October 2026 on an Intel Core Ultra 9 386H; eight pinned CPUs, 8 GiB physical memory, swap disabled. Current production browser Auto, eight requested lanes, automatic Extreme handoff and default CP-SAT admission.
Gurobi	Unavailable	—	—	—	Configuration `unavailable-license` evidence r2 · unavailable No runnable licensed environment and reproducible formulation are available for v1.
Halftime Team Pairings	Unsupported	—	—	—	Configuration `halftime-team-pairings-live-sequential-last-six-v1` evidence r2 · unsupported The visible workflow cannot express canonical named-station visit-count targets.
Hexaly	Unavailable	—	—	—	Configuration `unavailable-license` evidence r2 · unavailable No runnable licensed environment and reproducible formulation are available for v1.
IIENSTITU Random Group Generator	Unsupported	—	—	—	Configuration `iienstitu-live-avoid-history-seeded-v1` evidence r2 · unsupported The visible workflow cannot express canonical named-station visit-count targets.
Optimal Group Generator	Unsupported	—	—	—	Configuration `optimal-group-generator-live-fixed-ga-sequential-v1` evidence r2 · unsupported The live product cannot express named-station visit-count targets.
Google OR-Tools CP-SAT	Optimal	5/5	0	0	Configuration `ortools-cpsat-case-formulations-v1:station-rotation-zero-target-v3` evidence r19 · eligible Measured 11 October 2026 on an Intel Core Ultra 9 386H; eight pinned CPUs, 8 GiB physical memory, swap disabled. Frozen case-specific OR-Tools 9.15.6755 formulation and parameters.
Social Golfer Online	Unsupported	—	—	—	Configuration `unsupported-group-visit-counts` evidence r2 · unsupported The product cannot express canonical per-station visit-count targets.
Teach Arcade Group Maker	Unsupported	—	—	—	Configuration `teach-arcade-live-roundrobin-sequential-history-v1` evidence r2 · unsupported The visible workflow cannot express canonical named-station visit-count targets.
TourneyCard Golf Randomizer	Unsupported	—	—	—	Configuration `unsupported-group-visit-counts` evidence r2 · unsupported The product cannot express canonical per-station visit-count targets.

Measured attempts

GroupMixer · seed-101optimal zero

local browsercost 060.855sRSS —

GroupMixer · seed-202optimal zero

local browsercost 060.809sRSS —

GroupMixer · seed-303optimal zero

local browsercost 060.804sRSS —

GroupMixer · seed-404optimal zero

local browsercost 060.848sRSS —

GroupMixer · seed-505optimal zero

local browsercost 060.837sRSS —

Google OR-Tools CP-SAT · seed-101optimal zero

native processcost 02.992sRSS —

Google OR-Tools CP-SAT · seed-202optimal zero

native processcost 02.614sRSS —

Google OR-Tools CP-SAT · seed-303optimal zero

native processcost 04.732sRSS —

Google OR-Tools CP-SAT · seed-404optimal zero

native processcost 02.509sRSS —

Google OR-Tools CP-SAT · seed-505optimal zero

native processcost 02.808sRSS —

Per-attempt benchmark status, execution class, canonical cost, runtime, and memory
Tool / attempt	Execution	Status	Wall	Peak RSS
GroupMixer · seed-101	Browser	optimal zero	60.855s	—
GroupMixer · seed-202	Browser	optimal zero	60.809s	—
GroupMixer · seed-303	Browser	optimal zero	60.804s	—
GroupMixer · seed-404	Browser	optimal zero	60.848s	—
GroupMixer · seed-505	Browser	optimal zero	60.837s	—
Google OR-Tools CP-SAT · seed-101	Native	optimal zero	2.992s	—
Google OR-Tools CP-SAT · seed-202	Native	optimal zero	2.614s	—
Google OR-Tools CP-SAT · seed-303	Native	optimal zero	4.732s	—
Google OR-Tools CP-SAT · seed-404	Native	optimal zero	2.509s	—
Google OR-Tools CP-SAT · seed-505	Native	optimal zero	2.808s	—

Pair-frequency distribution

GroupMixer · seed-101

Number of participant pairs by meeting frequency
Meetings	Participant pairs
1	108

Unique contacts: 108
Repeat excess: 0
Repeated pairs: 0
Worst pair count: 1
Min contacts / person: 12
Mean contacts / person: 12

Evidence and reproduction

gm-scenarios materialize internal.station-rotation-18p-6g-6s.v1 --pretty --output case.json

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