18OE — Implementation Tracker

For the full rulebook picture → Rulebook Coverage · Alpha gaps → Open for Alpha

Bar widths reflect implementation effort (L3 step/round = 3× · L2 override = 2× · L1 constant = 1×), not item count.

Overall

113 / 226 items

Alpha

60% · 52 remaining · 65 beta deferred

Done & merged 106

Needs PR 7

Partial 10

Started 0

To do 103

Beta deferred 65

Done & Merged106

Game Setup7

Entities6

Map & Components11

Track Rights8

Track Rights Chit System5

Auction Phase2

Stock Market Grid11

Train Data & Phases9

Track Laying9

Token Placement3

Route & Revenue (Cross-Water)1

Train Purchase4

OR Steps (Major)7

Stock Rounds5

Railroad Formation3

Nationals2

Consolidation Phase1

End Game5

Minor Abilities5

Private Abilities2

In Work17

D-Train Revenue (BUG-031)

D-train city revenue doubling — 4D/5D trains double city value; then suppress doubling for Krasnaya Strela extra city (§15.7)L2

Minor Abilities

J – Grey LocomotiveL1

C (Golden Bell) — pre-OR blocking choice step (GoldenBellChoice); first/last/normal; entity order rebuilt from operating_order after choiceL3

Private Abilities

Wien Südbahnhof — token (price: 0, teleport_price: 0, extra_action: true) wired; still needed: cost-bypass in Token step (standard reachability still applies per §14.3) + sea-zone crossing costs still chargedL2/L3

Star Harbor — token (extra_slot, special_only) wired; still needed: port routing, revenue exclusion, SR windowL3

White Cliffs Ferry — token (hexes: ['N31']) wired; still needed: Phase 5 start event hook + ferry routingL3

Nationals

Rusted train claimL2/L3

Minor Mergers

Minor SR merge actionL2/L3

Plumbing / can_mergeL2/L3

merge_minor!L2/L3

18oe_dtrain_doubling1

L (Krasnaya Strela) — KrasnayaStrelaAssign step wired; train-choice before Route step; D-train doubling exception in 18oe_dtrain_doubling (BUG-031)L3

18oe_testing5

D-train city revenue doubling — 4D/5D trains double city value; then suppress doubling for Krasnaya Strela extra city (§15.7)L2

J – Grey LocomotiveL1

D (Green Junction) — DTokenPlacement step; assign action during track window; any non-metro non-offboard city; Phase 5 transition already wiredL3

Central Circle — hex_bonus approximation (£10/£20/£40/£60 by phase via after_phase_change); SR window via extra_action:true already wired; city-as-town routing deferred to beta (BUG-032)L2

Hochberg Mining — HochbergPlacement step (rough terrain ≥ £45); routing exclusion via check_route_token override; removal mechanic pending browser testL3

bbbt_protect!1

Barclay, Bevan, Barclay & Tritton — option 3 (block DOWN): bbbt_protect! sets @bbbt_protected_corp; sell_shares_and_change_price override passes movement: :none; finish_bbbt_sr! clears + closes at SR end; options 1 (re-par) and 2 (reserve share) deferred to betaL2

choose1

Swift Metropolitan Line — SR choose action (Phase 4+); claim_sml_train! assigns rusted 2+2 outside train limit (buyable=false, rusted=true); num_corp_trains + must_buy_train? exclude SML train; route restriction §11.3.8 free via base check_overlapL2

count_per_or: 21

Brandt & Brandau — count_per_or: 2 + free tile wired; routing exclusion implemented (non-owning RRs blocked via @bbe_hexes); still needed: removal mechanic (pay terrain cost + tile point)L2

token3

Star Harbor — token (extra_slot, special_only) wired; still needed: port routing, revenue exclusion, SR windowL3

White Cliffs Ferry — token (hexes: ['N31']) wired; still needed: Phase 5 start event hook + ferry routingL3

18oe_mergers4

Rusted train claimL2/L3

Minor SR merge actionL2/L3

Plumbing / can_mergeL2/L3

merge_minor!L2/L3

first1

C (Golden Bell) — pre-OR blocking choice step (GoldenBellChoice); first/last/normal; entity order rebuilt from operating_order after choiceL3

To Do103

Map & Components

Verify M28 London / AA82 Constantinople / I20 Dublin / O28 Le Havre / X33 Marseille are in yellow: section in map.rb (edges added in 18oe_testing; section move not yet confirmed)L1

N31 Lille second token slot for White Cliffs Ferry — pre-printed Lille tile needs a secondary station slot; confirm against physical mapL1

OE9–OE11 — green double-town path edge orientations neededL1

OE20–OE22 — brown double-town path edge orientations neededL1

OE19 — tile type unknown; must be identified and definedL1

Verify standard tile quantities against physical tile manifestL1

Audit OE-specific tile upgrade paths against physical manifestL1

Auction Phase

All-pass price reduction — if all players consecutively pass before opening packet is sold, privates pay dividends then all items on topmost row reduce by £5; repeats; items reaching £0 must all be taken by next playerL2

Stock Rounds

Voluntary regional removal — player may remove one unfloated regional during Regional/Minor Phase; max 6 totalL2/L3

Reserved secondary shares — during Initial SR only, each player may designate one regional's secondary (25%) share as reserved; no other player may purchase it until the second SR; cancelled if regional expands to major before its first ORL2

Trade with another player — during own SR turn, controlling player may offer personal share trade to any other player; recipient not obligated to acceptL2

Track Laying

First-OR green tile exception (§11.1.9) — Phase 2 only, first OR after float: if RR cannot connect home token to any town/city via land or ferry without a sea crossing, it may lay one non-city green tile at cost of all remaining tile points; requires ≥1 tile point; cannot be exploited deliberatelyL2

Pullman Cars

Pullman asset type — does not count against train limit; max 1 per non-national companyL3

Revenue bonus: +£10 × assigned train level, once per ORL2/L3

Purchase from Minor M: £150 + £15 royalty; J-minor discount on price onlyL3

Purchase from Open Market: £150, no royalty; available Phase 4+L3

Purchase from another RR: negotiated priceL3

Minor M free Pullman: if Minor M not closed at Phase 4 start, places free PullmanL2/L3

Discard order: rusted trains first; Pullman voluntarily returnable to Open MarketL3

Company with zero trains but holds Pullman: retain until next train acquiredL3

Train Purchase

Train type lock for inter-company purchases — minors may only sell to minors, regionals to regionals, majors to majors (§11.3)L2

Forced purchase — president covers shortfall; else national conversion (majors) or insolvency (minors/regionals)L3

First-round insolvency: president cash → treasury; company receives reserved 2+2; presidential cert → Open Market; president paid face valueL3

OR Steps (Major)

Investigate Engine::Step::Exchange in OR step list — minor exchange abilities fire in SR only; confirm Exchange never triggers during OR and remove if vestigialL2

Minor Abilities

7.13 Minor M (CIWL) — holds 10 Pullman cars (see §11.6.2)L3

Private Abilities

8.2 Barclay, Bevan, Barclay & Tritton — owner selects one of three abilities at time of useL3

8.8 Swift Metropolitan Line — from Phase 4, one controlled RR may keep one 2+2 outside train limitL3

Token Transfer Between Majors

During major's OR Transfer Tokens step: controlling player transfers one token between two majorsL2

Cost: token value (paying major) + token value (receiving major, same zone) + transfer fee (Normal £20 / Grand £40 / Metropolis £60)L2

Selling a token: returns to charter at highest-cost open positionL2

Tests

Smoke spec — Engine::Game::G18OE.new(%w[A B C D]) does not raise

Basic game flow (auction → regional/minor → major phase)

Train phase transitions (rusting, limits)

Stock market movement (right/left/up/down, edge cases)

Minor ability transfer

Pullman car revenue

Map & Components

Ferry distance numbers — per-zone crossing distances needed for cross-water cost calculations (§8d); sea zone borders themselves are completeL1

Ferry sea hexes — partial work exists; still needed: N29/G22/N25/I22/I24/AE12/AF13/AB21/AB23/AB25L1

Ferry route engine override — game.rb override to whitelist exits toward blue hexes that carry a matching pre-printed pathL2

Lille↔London ferry — tiles connect correctly; all other ferry routes blocked pending L2 engine overrideL2

Port sea stubs [BETA] — blue tiles at port entry points use junction;path=a:X,b:_0,terminal:1 as connectors between land port paths and sea ferry routes; model: land port → stub → sea ferry hexes → stub → land port; implement per port once ferry routing engine override is in place; public vs private port access distinction applies here (see §8d)L1/L2

G30 inland port [BETA] — G30 currently has junction;path=a:4,b:_0 (missing terminal:1); inland ports differ from coastal port stubs in routing rules — define and document the distinction before implementing; add terminal:1 as part of this workL1

Patronage Tiles

Setup: randomise and place patronage tiles on map cities at game start (3 pink, 3 yellow, 3 white, 8 green drawn per group, rest discarded)L1

Payout: when a RR first lays a track tile in a patronage hex during Lay Track step, bank pays one-time bonus equal to tile amount for the highest track color available in current Train Phase; patronage tile removedL2

Float edge case: minor that places its home token on a patronage hex fulfils it immediately and receives the lowest payout shown on the tileL2

Stock Rounds

+3 RIGHT — on the first Orient Express run, share price moves 3 steps right (depends on §8e)L2

Route & Revenue (Cross-Water)

Local train town counting: towns beyond city limit fill to train level; express trains skip townsL2

Combined train runs: Level ≤4 trains combine (sum); Level 5+, 4D, 5D cannot combineL2

Cross-water costs: Ferry = +£5 track / +£20 token × distance; Sea = +£10 track / +£40 token × zonesL2

Ferry mechanics: distance counts against city limit; public ferry usable by any RR; enemy tokens blockL2

Port authority markers: each reduces sea zone count + ferry distance by 2; 16 total (8 North Sea, 8 Med)L2/L3

Port authority purchase — majors only, one per major; £125 paid during OR at any point before Buy Trains step; North Sea covers light-blue zones, Mediterranean covers sea-green zones; also reduces cross-water track and token costsL2

Port authority transfer — major may buy a PA marker from another major during its Transfer Tokens OR step; price exactly £125 to selling major's treasuryL2

Port types: public (any RR) vs private (owning RR only)L2

Offshore port mechanics: train connects regardless of intervening hexesL2

Channel passages at Copenhagen and ConstantinopleL2

Orient Express

Detect valid OE route: Constantinople (AA82) + one of Paris/London/Berlin/Madrid/Sankt-Peterburg + land trackL2

First-time bonus: £30 (Ph2–4), £60 (Ph5–6), £100 (Ph7–8); OE marker placed on majorL2

+3 RIGHT on first OE run (also §6b)L2

Train combining: Level ≤4 combine; combined level = sum; city limit = combined levelL2

Subsequent OE runs: no bonus, no extra stock movementL2

Mandatory OE: if OE route is best possible, president must run itL2

OE blocked for nationalsL2

D-train bonus does NOT apply to OE first-time bonusL2

OR Steps (Major)

Major purchases one abandoned minor from Open Market for £60 (to bank); minor's charter + assets added as if merged but no share of major stock issued to former ownerL2

Remove Engine::Step::Bankrupt from OR step list — base bankruptcy fires game-end immediately; 18OE force-buy should route to national conversion (BUG-019); replace with a custom no-op or overrideL2

Minor Abilities

7.9 Minor H (Great Western Steamship) — reduces sea zones by 1 (Ph1–6) or 2 (Ph7–8)L2

D (Green Junction) — sea/ferry variant: unreachable-city placement step where target city is accessible only via sea or ferryL3

Railroad Formation

Forming a national (trigger): phase 4/6/8 purchase → trigger_nationals_formation! → ordered queueL2

Forming a national (steps): Step::ConvertToNational — cash→bank, treasury certs→OM, tokens removed, national placed, trains inheritedL2/L3

Abandoning a minor (§9.5): triggered by national formation or consolidation failure — abandon_minor!: charter→Open Market; trains→Open Market; tokens removed; cash→bank; track rights chit staysL2

D minor token and L minor marker stay with their charters on abandonmentL2

M minor Pullman stays with charter on abandonmentL2

Nationals

national_revenue: linked/unlinked split, best-first, D-train double, flat-rate fill; [:payout] onlyL2

Inherent Pullman: +£10 × highest non-rusted train levelL2

No tokens / no terrain costs — return 0 if entity.type == :national in upgrade_cost (BUG-011); skip token step already doneL2

Train limit discard via depot.reclaim_trainL2

Merged minors abandoned at national formation (depends on @minor_track_rights)L3

Track rights / OE markers / private markers removed at formationL3

Exchange owned rusted train for higher-level unclaimed rusted trainL2/L3

Flip owned rusted train from express to local sideL2/L3

Upgrade rusted → non-rusted by purchasing from same-owner majorL2/L3

Minor Mergers

7.1 Ability transfer — minor merges into regional/major; ability inherited; nationals cannot inheritL3

7.2 Minor A (Silver Banner) — bank pays major current share price at moment of mergerL3

No-stock connection check: merge only if unlimited-city train can reach minor's token to major's networkL3

Player choice on token conflict and train declineL3

Cross-player personal cash side payment UIL3

Solicit-offers rule for unmergeable minorsL3

Cannot pass in Consolidation Phase if owns unfloated minors/regionals not yet mergedL2

Minor Mergers

Consolidation Round forced mergers (§10.6) — hook into Step::ConsolidateL3

Consolidation Phase

Conditional merger: major/national may offer; if no offer, company is abandonedL3

End Game

Second final OR: each company pays same revenue as first final OR; no track/token/train actions (BUG-026)L3

Tests

National revenue calculation

Orient Express bonus (first run, subsequent runs)

Concession Phase

Define Concession round with ordered float actions (CON1–CON10)L3

Wire concession cards to specific regional/major home tokens and par valuesL1

Float obligation: holder pays 2× par; obligation transfers if holder cannot payL3

Round sequencing: Auction → Concession → Regional/Minor PhaseL2

2-player without-concessions variant: skip Concession Phase (starting cash already correct)L2

Variants & Scenarios

UK-FR variant entities (4 minors: C/H/K/M; 7 regionals: BEL/GSWR/GWR/LNWR/MIDI/OU/PLM)L1

UK-FR train rusting rulesL1

UK-FR map hex definitionsL1

Medium / short scenarios — reduced RR counts, modified OE destinationsL2

Verify M28 London / AA82 Constantinople / I20 Dublin / O28 Le Havre / X33 Marseille are in yellow: section in map.rb (edges added in 18oe_testing; section move not yet confirmed)

N31 Lille second token slot for White Cliffs Ferry — pre-printed Lille tile needs a secondary station slot; confirm against physical map

OE9–OE11 — green double-town path edge orientations needed

OE20–OE22 — brown double-town path edge orientations needed

OE19 — tile type unknown; must be identified and defined

Verify standard tile quantities against physical tile manifest

Audit OE-specific tile upgrade paths against physical manifest

Ferry distance numbers — per-zone crossing distances needed for cross-water cost calculations (§8d); sea zone borders themselves are complete

Ferry sea hexes — partial work exists; still needed: N29/G22/N25/I22/I24/AE12/AF13/AB21/AB23/AB25

Setup: randomise and place patronage tiles on map cities at game start (3 pink, 3 yellow, 3 white, 8 green drawn per group, rest discarded)

Wire concession cards to specific regional/major home tokens and par values

UK-FR variant entities (4 minors: C/H/K/M; 7 regionals: BEL/GSWR/GWR/LNWR/MIDI/OU/PLM)

UK-FR train rusting rules

UK-FR map hex definitions

L1/L2

Trade with another player — during own SR turn, controlling player may offer personal share trade to any other player; recipient not obligated to accept

Train type lock for inter-company purchases — minors may only sell to minors, regionals to regionals, majors to majors (§11.3)

Investigate Engine::Step::Exchange in OR step list — minor exchange abilities fire in SR only; confirm Exchange never triggers during OR and remove if vestigial

During major's OR Transfer Tokens step: controlling player transfers one token between two majors

Cost: token value (paying major) + token value (receiving major, same zone) + transfer fee (Normal £20 / Grand £40 / Metropolis £60)

Selling a token: returns to charter at highest-cost open position

Ferry route engine override — game.rb override to whitelist exits toward blue hexes that carry a matching pre-printed path

Lille↔London ferry — tiles connect correctly; all other ferry routes blocked pending L2 engine override

Float edge case: minor that places its home token on a patronage hex fulfils it immediately and receives the lowest payout shown on the tile

+3 RIGHT — on the first Orient Express run, share price moves 3 steps right (depends on §8e)

Local train town counting: towns beyond city limit fill to train level; express trains skip towns

Combined train runs: Level ≤4 trains combine (sum); Level 5+, 4D, 5D cannot combine

Cross-water costs: Ferry = +£5 track / +£20 token × distance; Sea = +£10 track / +£40 token × zones

Ferry mechanics: distance counts against city limit; public ferry usable by any RR; enemy tokens block

Port authority transfer — major may buy a PA marker from another major during its Transfer Tokens OR step; price exactly £125 to selling major's treasury

Port types: public (any RR) vs private (owning RR only)

Offshore port mechanics: train connects regardless of intervening hexes

Channel passages at Copenhagen and Constantinople

Detect valid OE route: Constantinople (AA82) + one of Paris/London/Berlin/Madrid/Sankt-Peterburg + land track

First-time bonus: £30 (Ph2–4), £60 (Ph5–6), £100 (Ph7–8); OE marker placed on major

+3 RIGHT on first OE run (also §6b)

Train combining: Level ≤4 combine; combined level = sum; city limit = combined level

Subsequent OE runs: no bonus, no extra stock movement

Mandatory OE: if OE route is best possible, president must run it

OE blocked for nationals

D-train bonus does NOT apply to OE first-time bonus

Major purchases one abandoned minor from Open Market for £60 (to bank); minor's charter + assets added as if merged but no share of major stock issued to former owner

Remove Engine::Step::Bankrupt from OR step list — base bankruptcy fires game-end immediately; 18OE force-buy should route to national conversion (BUG-019); replace with a custom no-op or override

7.9 Minor H (Great Western Steamship) — reduces sea zones by 1 (Ph1–6) or 2 (Ph7–8)

Forming a national (trigger): phase 4/6/8 purchase → trigger_nationals_formation! → ordered queue

D minor token and L minor marker stay with their charters on abandonment

M minor Pullman stays with charter on abandonment

national_revenue: linked/unlinked split, best-first, D-train double, flat-rate fill; [:payout] only

Inherent Pullman: +£10 × highest non-rusted train level

No tokens / no terrain costs — return 0 if entity.type == :national in upgrade_cost (BUG-011); skip token step already done

Train limit discard via depot.reclaim_train

Cannot pass in Consolidation Phase if owns unfloated minors/regionals not yet merged

Round sequencing: Auction → Concession → Regional/Minor Phase

2-player without-concessions variant: skip Concession Phase (starting cash already correct)

Medium / short scenarios — reduced RR counts, modified OE destinations

L2/L3

Voluntary regional removal — player may remove one unfloated regional during Regional/Minor Phase; max 6 total

Revenue bonus: +£10 × assigned train level, once per OR

Minor M free Pullman: if Minor M not closed at Phase 4 start, places free Pullman

Port authority markers: each reduces sea zone count + ferry distance by 2; 16 total (8 North Sea, 8 Med)

Forming a national (steps): Step::ConvertToNational — cash→bank, treasury certs→OM, tokens removed, national placed, trains inherited

Exchange owned rusted train for higher-level unclaimed rusted train

Flip owned rusted train from express to local side

Upgrade rusted → non-rusted by purchasing from same-owner major

Pullman asset type — does not count against train limit; max 1 per non-national company

Purchase from Minor M: £150 + £15 royalty; J-minor discount on price only

Purchase from Open Market: £150, no royalty; available Phase 4+

Purchase from another RR: negotiated price

Discard order: rusted trains first; Pullman voluntarily returnable to Open Market

Company with zero trains but holds Pullman: retain until next train acquired

Forced purchase — president covers shortfall; else national conversion (majors) or insolvency (minors/regionals)

First-round insolvency: president cash → treasury; company receives reserved 2+2; presidential cert → Open Market; president paid face value

7.13 Minor M (CIWL) — holds 10 Pullman cars (see §11.6.2)

8.2 Barclay, Bevan, Barclay & Tritton — owner selects one of three abilities at time of use

8.8 Swift Metropolitan Line — from Phase 4, one controlled RR may keep one 2+2 outside train limit

D (Green Junction) — sea/ferry variant: unreachable-city placement step where target city is accessible only via sea or ferry

Merged minors abandoned at national formation (depends on @minor_track_rights)

Track rights / OE markers / private markers removed at formation

7.1 Ability transfer — minor merges into regional/major; ability inherited; nationals cannot inherit

7.2 Minor A (Silver Banner) — bank pays major current share price at moment of merger

No-stock connection check: merge only if unlimited-city train can reach minor's token to major's network

Player choice on token conflict and train decline

Cross-player personal cash side payment UI

Solicit-offers rule for unmergeable minors

Consolidation Round forced mergers (§10.6) — hook into Step::Consolidate

Conditional merger: major/national may offer; if no offer, company is abandoned

Second final OR: each company pays same revenue as first final OR; no track/token/train actions (BUG-026)

Define Concession round with ordered float actions (CON1–CON10)

Float obligation: holder pays 2× par; obligation transfers if holder cannot pay

untagged

Smoke spec — Engine::Game::G18OE.new(%w[A B C D]) does not raise

Basic game flow (auction → regional/minor → major phase)

Train phase transitions (rusting, limits)

Stock market movement (right/left/up/down, edge cases)

Minor ability transfer

Pullman car revenue

National revenue calculation

Orient Express bonus (first run, subsequent runs)