Handshake Island

Seed 1 · binding-silent · Claude Haiku 5.5

On a small island, 6 residents barter wood, rope, nails, cloth and fish for 8 rounds. Each secretly owns one building project, and the island holds too little rope for every project to be built. Accepted deals are carried out at once, and residents trade in silence.

Cast
Claude Haiku 5.5 in every seat
Result
Mara scored most (39). Efficiency 0.94: 94 of an optimum of 100

Scoreboard

The optimum builds Mara’s smokehouse, Rowan’s tent, Marcus’s boat and Theo’s cabin.

ResidentProjectValueFishScore
Marasmokehousebuilt241539
Rowantentbuilt241135
Marcusboatbuilt30232
Theocabinnot built221010
Niasledgebuilt16723
Felixnetnot built122727

Round 1

Mara

  • Offers Rowan cloth 2 for wood 3. O1
  • Offers Nia cloth 1 for wood 1. O2
Behind this turn

I need 4 wood for my smokehouse and already have the rope and nails covered. Checking who has wood to trade: Rowan and Nia each have 5, Theo has 3, Felix 2, Marcus 1. I'm considering offering Rowan cloth in exchange for wood, since Rowan already has cloth but lacks rope and nails, so I'm weighing what might actually appeal to them.

Rowan

  • Accepts Mara’s offer: gives wood 3 for cloth 2. O1
  • Offers Marcus fish 3 for rope 2. O3
Behind this turn

My tent needs cloth 4, rope 2, wood 1; I have cloth 2, wood 5, rope 0, so I still need cloth 2 and rope 2. Mara's offer of trading wood 3 for cloth 2 works well—I'd end up with cloth 4 and wood 2, leaving enough wood to cover the rope trade I still need. That seems like a good deal to accept. Since rope is scarce and Marcus has 4, I'll offer him fish 3 for rope 2—fish is cheap for me since I have 12 and it's only worth 1 point each, so this keeps my wood intact for the tent requirement.

Marcus

  • Accepts Rowan’s offer: gives rope 2 for fish 3. O3
  • Offers Nia nails 2 for wood 3. O4
  • Offers Rowan fish 4 for cloth 2. O5
Behind this turn

Checking my inventory against the boat requirements, I'm short on wood and cloth but have surplus rope. Rowan's offer of fish for rope looks appealing since I'd still have exactly enough rope left for the boat, and fish are worth points too. For my own offers, I'll target Nia for wood (trading spare nails) and Rowan for cloth (trading surplus fish), since I don't need nails for anything myself. I'll accept the current offer and prepare those two proposals.

Theo

  • Offers Marcus fish 4 for rope 2. O6
  • Offers Felix cloth 1, fish 2 for nails 1. O7
Behind this turn

I still need 1 more nail and 2 rope for the cabin, and I have none of either, while rope is especially scarce overall with only a few units spread among the others. I'll try offering some of my plentiful fish in exchange for rope and nails.

Nia

  • Declines Mara’s offer. O2
  • Accepts Marcus’s offer: gives wood 3 for nails 2. O4
  • Offers Mara cloth 1, fish 3 for rope 1. O8
  • Offers Rowan fish 2 for wood 1. O9
Behind this turn

My sledge still needs 2 more nails and 1 more rope. Checking the trade from mara: giving wood 1 for cloth 1 still leaves me with plenty of wood for the sledge, but cloth isn't something the sledge requires, so that trade alone doesn't solve my shortage. Marcus's offer of nails 2 for wood 3 is more valuable since nails are critical — accepting it pushes my wood down close to what the sledge needs, so I should decline Mara's cloth trade to conserve wood. That still leaves me short 1 rope, so I'm scanning who has rope to spare — mara, rowan, marcus, and felix all hold some. I'll craft offers using my spare fish and cloth: propose to mara trading fish and cloth for a rope, and to rowan trading fish for a wood, which should round out my wood and rope needs after accepting Marcus's deal.

Felix

  • Accepts Theo’s offer: gives nails 1 for cloth 1, fish 2. O7
  • Offers Marcus fish 3 for rope 1. O10
  • Offers Rowan fish 3 for rope 1. O11
Behind this turn

My net still needs rope 1 and cloth 1 more beyond what I hold. Theo's offer of nails for cloth and fish covers the cloth gap and adds score, even though I still need rope elsewhere, so it's worth accepting. For rope, I'm scanning who holds extra: Mara, Rowan, Marcus each have 2, Nia has 1. I'm leaning toward offering Rowan a mix of nails and fish for rope, and also testing Marcus with fish for rope, since both might take surplus fish or nails off my hands cheaply — though I need to track that my nails drop to 1 after the Theo trade, which affects what I can actually offer afterward. Simplifying, I'll just offer fish for rope to both Rowan and Marcus since fish is abundant and low-value to me anyway.

Round 2

Rowan

  • Declines Marcus’s offer. O5
  • Accepts Nia’s offer: gives wood 1 for fish 2. O9
  • Declines Felix’s offer. O11
Behind this turn

My tent is finished with a score of 33, so now I need to safeguard my remaining goods: cloth 4, rope 2, and wood 1, plus spare wood 1 and fish 9. I should decline most offers but could consider nia's trade of 1 wood for 2 fish, since that still leaves me enough wood.

Marcus

  • Declines Theo’s offer. O6
  • Declines Felix’s offer. O10
  • Offers Felix fish 5 for cloth 2. O12
  • Offers Rowan fish 5 for cloth 2. O13
Behind this turn

I should decline both O6 and O10 since rope is too precious to spend right now, keeping my boat intact. For the cloth I need, I should target Felix who has 3 cloth, since Rowan already declined my fish offer.

Theo

  • Offers Marcus fish 5 for rope 2. O14
  • Offers Mara fish 5 for rope 2. O15
Behind this turn

I still need another rope, and Marcus kept his rope after declining the nails trade. I'm considering offering fish for rope to both Marcus and Mara, though if both accept I'd end up with more rope than I actually need. I'll just send both offers—5 fish for 2 rope to Marcus, and the same to Mara—since whichever accepts first is fine, and with 10 fish I have plenty to spare.

Nia

  • Offers Rowan fish 3 for rope 1. O16
Behind this turn

Still need rope. Mara's O8 to me is still pending her response, and Felix likely needs his rope too, so I should try offering Rowan fish 2 in exchange for rope while waiting on Mara.

Felix

  • Declines Marcus’s offer. O12
  • Offers Mara fish 5 for rope 1. O17
  • Offers Rowan fish 5 for rope 1. O18
Behind this turn

I should decline Marcus's fish-for-cloth trade since giving up 2 cloth would leave me short for the net. Instead I need rope, so I'm considering offering Mara fish in exchange for rope since she has some to spare.

Mara

  • Declines Nia’s offer. O8
  • Declines Theo’s offer. O15
  • Declines Felix’s offer. O17
  • Offers Theo cloth 1 for wood 1. O19
  • Offers Marcus fish 2 for wood 1. O20
Behind this turn

I need to keep my rope at 2 and decline anything asking me to give rope away, so I'm rejecting those offers. I still need one more wood, so I'm considering trading cloth with Theo since he has wood to spare.

Round 3

Marcus

  • Declines Theo’s offer. O14
  • Declines Mara’s offer. O20
  • Offers Felix fish 7 for cloth 2. O21
Behind this turn

I still need cloth, so I'm declining the rope and wood offers since they don't help. Checking who has cloth to trade: rowan holds 4, felix 3, mara, theo, and nia each have 1, and I need to figure out who's still willing to deal. Since rowan's offer is already pending, I won't duplicate it to avoid overpaying by getting too much cloth. Instead, I'll make one new offer to felix, proposing fish 7 for cloth 2, and leave it at that single offer.

Theo

  • Declines Mara’s offer. O19
  • Offers Rowan fish 6 for rope 2. O22
  • Offers Marcus fish 6 for rope 2. O23
Behind this turn

I should decline Mara's cloth-for-wood offer since I need all 3 wood for the cabin, and I still need 2 rope. Rowan, Marcus, and Mara each hold 2 rope, so I'm thinking about what to trade Rowan since he has cloth and wood, and considering what Nia might want in exchange for her rope. Actually, I'll decline O19 and instead offer rowan and marcus each 6 fish for 2 rope.

Nia

  • Offers Marcus fish 4 for rope 1. O24
Behind this turn

Rowan's offer on O16 is still open since his round-2 turn already passed without a response, so it'll likely come up again in round 3. Mara declined, so I still need rope 1 — Felix has rope 1 but may need rope 2 as well, while Marcus holds rope 2 and wood 4.

Felix

  • Declines Marcus’s offer. O21
  • Offers Rowan nails 1, fish 4 for rope 1. O25
  • Offers Marcus nails 1, fish 4 for rope 1. O26
Behind this turn

I'm declining Marcus's cloth-for-fish trades and rethinking rope offers—maybe pairing nails with fish could tempt Rowan, who has no nails but holds rope and cloth for their project.

Mara

  • Offers Felix fish 3 for wood 1. O27
  • Offers Nia fish 3 for wood 1. O28
Behind this turn

Since I still need one wood, I could try offering fish instead—both Felix and Nia might take 3 fish in exchange for a wood, since fish is worth a point each and I have plenty to spare.

Rowan

  • Declines Marcus’s offer. O13
  • Declines Nia’s offer. O16
  • Declines Felix’s offer. O18
  • Declines Theo’s offer. O22
  • Declines Felix’s offer. O25
Behind this turn

All the offers want cloth or rope, which I don't want to give up, so I'll decline them all — I don't really need anything they're offering, though I could trade fish if it ever came up.

Round 4

Theo

  • Offers Mara fish 7 for rope 2. O29
  • Offers Rowan fish 7 for rope 2. O30
Behind this turn

Rope seems scarce since everyone likely needs it, so I should consider sweetening my offers—maybe proposing 7-8 fish for just 2 rope to whoever has spare, like Mara or Rowan, since Nia and Felix's situations are less clear.

Nia

  • Declines Mara’s offer. O28
  • Offers Mara fish 5 for rope 1. O31
Behind this turn

That offer of fish for wood isn't worth breaking my sledge plans over, so I'll decline. I still need rope, and checking who holds it: Mara and Rowan have 2 each, Marcus has 2, Felix only 1, Theo none — Felix might not even have rope to spare for a trade. Maybe I should try sweetening my offer to Mara, since she declined fish 3 plus cloth before; bumping it up to fish 5 for her rope might work better.

Felix

  • Accepts Mara’s offer: gives wood 1 for fish 3. O27
  • Offers Mara nails 1, fish 4 for rope 1. O32
Behind this turn

Trading 1 wood for Mara's fish deal still leaves me enough wood for the net, so I'll accept that. Now I still need rope, and since Mara already declined my fish-for-rope offer, I'm trying to think of something else I could offer her, maybe wood, though that would leave me short.

Mara

  • Declines Theo’s offer. O29
  • Declines Nia’s offer. O31
  • Declines Felix’s offer. O32
  • Offers Theo cloth 1 for fish 2. O33
Behind this turn

My project is finished now, so I should hold onto my remaining rope, nails, and wood and decline any offers that would cost me those resources. I might consider trading my extra cloth for fish instead, maybe proposing an exchange with Felix.

Rowan

  • Declines Theo’s offer. O30

Marcus

  • Declines Theo’s offer. O23
  • Declines Nia’s offer. O24
  • Declines Felix’s offer. O26
  • Offers Theo fish 7 for cloth 1. O34
  • Offers Nia fish 7 for cloth 1. O35
Behind this turn

Since Rowan and Felix are refusing fish, they probably need rope or wood instead. Checking Rowan's inventory against possible projects, it looks like Rowan already has enough cloth, rope, and wood to complete a tent — meaning cloth likely isn't what Rowan needs. Felix seems to need rope for a net project, which explains why Felix keeps offering rope-for-fish trades — Felix actually wants rope, and I need the rope I have. Since fish seems worthless to everyone relative to their goals, I'm thinking about trading cloth instead — Mara, Theo, and Nia each have exactly 1 cloth, so I could try offering fish for cloth with Theo and Nia separately, declining Theo's rope request in the process.

Round 5

Nia

  • Accepts Marcus’s offer: gives cloth 1 for fish 7. O35
  • Offers Rowan fish 6 for rope 1. O36
Behind this turn

Accepting the fish-for-cloth trade gains me 7 fish for a spare cloth, which seems worthwhile even though cloth isn't needed for the sledge. I still need rope though — since Rowan rejected fish 3 before, I'll try offering a higher amount, maybe fish 6, to see if that secures the rope I need.

Felix

  • Offers Rowan fish 6 for rope 1. O37
  • Offers Marcus fish 6 for rope 1. O38
Behind this turn

Since rope holders will be reluctant, I'm thinking of sweetening offers with fish, which I have 17 of. I could try offering rowan 8 fish for 1 rope, and the same to marcus, even though each fish is worth a point to me, since gaining rope might be worth the trade-off.

Mara

  • Passes.
Behind this turn

I think I'll just hold my current position and pass without making any offers, avoiding unnecessary risk.

Rowan

  • Declines Nia’s offer. O36
  • Declines Felix’s offer. O37

Marcus

  • Declines Felix’s offer. O38
  • Offers Mara fish 6 for cloth 1. O39
Behind this turn

My score dropped to 8 since the boat isn't complete yet, so only fish counts. I still need one more cloth — Theo has one, and my pending trade offer to them is still open since Theo goes last in the turn order this round, so they haven't had a chance to respond yet. I'll decline O38, and as a backup, offer Mara fish 6 for her cloth too. If both Theo and Mara accept, I'd end up with excess cloth, but that's an acceptable risk since I could trade the surplus later.

Theo

  • Declines Mara’s offer. O33
  • Declines Marcus’s offer. O34
  • Offers Rowan fish 9 for rope 2. O40
  • Offers Mara fish 9 for rope 2. O41
Behind this turn

Trading cloth for 2 fish isn't worth it since I already have enough cloth for the cabin and fish count directly for points—declining seems better than accepting Mara's offer. Rope is the real bottleneck though. With only 8 rope total and four projects needing it, the current rope holders (Mara, Rowan, Marcus) will likely keep theirs for their own projects. Since I have spare fish and exact amounts of everything else, I should try offering a generous 9 fish to Rowan and Mara each for 2 rope, since Marcus already turned me down.

Round 6

Felix

  • Offers Mara nails 1, fish 8 for rope 1. O42
  • Offers Nia fish 9 for rope 1. O43
Behind this turn

If rope holders refuse, I should consider sweetening the deal for mara with nails plus extra fish, or try nia instead since she also has rope to trade.

Mara

  • Accepts Marcus’s offer: gives cloth 1 for fish 6. O39
  • Declines Theo’s offer. O41
  • Declines Felix’s offer. O42
Behind this turn

I'll accept O39, trading 1 cloth for 6 fish since cloth isn't needed elsewhere, but decline O41 and O42 since they require rope I don't have.

Rowan

  • Declines Theo’s offer. O40

Marcus

  • Passes.
Behind this turn

With the boat done at score 32, I want to hold onto my wood, rope, and cloth rather than trade them away. Fish is a bit low but manageable, and since I have no spare goods to offer, I'll just pass this round without making or accepting any trades.

Theo

  • Offers Felix fish 5 for rope 1. O44
  • Offers Nia fish 5 for rope 1. O45
Behind this turn

Marcus's fish dropped to 2, suggesting he traded it away, and now with wood 4, rope 2, cloth 2 he has exactly the materials for a boat — so his project is likely a boat, meaning he probably won't part with rope. I'm now checking Mara's wood and rope totals to see what she might be building. Mara looks set up for a smokehouse, Rowan for a net, and Felix for either a sledge or tent — all needing rope, so none of them seem likely to give it up. Nia has only 1 rope but needs 2 for her sledge, which means with 3 rope-dependent projects locking up 6 rope, only 2 remain floating between Nia and Felix — exactly what my cabin needs, so my best play is probably offering fish (which both of them have plenty of) in exchange for their spare rope.

Nia

  • Declines Felix’s offer. O43
  • Declines Theo’s offer. O45
  • Offers Felix fish 6 for rope 1. O46
Behind this turn

I should decline offers asking for my rope since I need it for the sledge, which requires more rope than I currently have—rope is scarce overall. With only a couple rounds left, I'm weighing whether the sledge goal is still realistic, and noting that Felix offering his rope for fish suggests he might be abandoning his own project. Looking at the pattern, both Felix and Theo are trying to buy rope with fish, not sell it, which confirms rope is valuable and I shouldn't give mine up. Instead I'll flip the dynamic and propose to Felix that I give him fish in exchange for his rope, since he seems to value fish more highly right now—I'll go with offering fish 6 for his rope 1, leaving Theo out since he has no rope to trade.

Round 7

Mara

  • Passes.

Rowan

  • Passes.

Marcus

  • Passes.

Theo

  • Offers Nia fish 4 for rope 1. O47
Behind this turn

Felix hasn't answered yet since he goes last this round, so O44 stays open for him. With only two rounds left and rope deals unlikely, I should sweeten the offer to Nia—try 8 fish for 1 rope—while keeping O44 available for Felix. But if Felix takes O44 (5 fish) and Nia accepts 8, that's 13 fish total, more than my 10. I need to scale back Nia's offer to something like 4 fish for 1 rope so the combined cost stays within budget if both accept.

Nia

  • Declines Theo’s offer. O47
  • Offers Marcus fish 8 for rope 1. O48
  • Offers Mara fish 8 for rope 1. O49
Behind this turn

With two rounds left, I should decline Theo since rope seems unlikely now that Felix didn't accept. I still have 17 fish banked and the project's worth 16 more if I complete it with rope, so I could afford to offer several fish to Rowan or Marcus as a sweetener—maybe offering Rowan 8 fish for the rope.

Felix

  • Declines Theo’s offer. O44
  • Declines Nia’s offer. O46
  • Offers Rowan nails 1, fish 10 for rope 1. O50
  • Offers Marcus nails 1, fish 10 for rope 1. O51
Behind this turn

I'll decline those offers since they're after my rope. Tallying the island's rope supply, I count 8 total across everyone, and since I only hold 1 while needing 2, I'd have to get someone to part with theirs — interesting that Theo and Nia, who have none or little, are the ones offering fish for my rope, which signals they see it as valuable. With only a couple rounds left, I doubt I can fully close the gap, but I'll try one more push: offering a big batch of fish to Rowan and Marcus in exchange for rope, since both are sitting on cloth and rope surplus and might bite for extra fish.

Round 8

Rowan

  • Declines Felix’s offer. O50
Behind this turn

I should decline since rope is actually needed here — this is the final turn, nothing more to add.

Marcus

  • Declines Nia’s offer. O48
  • Declines Felix’s offer. O51
Behind this turn

Both options cost rope and would break the boat, so I'll decline both since this is the last round with no further offers coming.

Theo

  • Offers Nia fish 5 for rope 1. O52
  • Offers Felix fish 5 for rope 1. O53
Behind this turn

This is the last round, so I should try a final offer to Nia and Felix—5 fish each for 1 rope apiece, which covers the 10 fish I need, since getting the rope would secure the 22-point cabin.

Nia

  • Declines Theo’s offer. O52
  • Offers Felix fish 10 for rope 1. O54
  • Offers Mara fish 10 for rope 1. O55
Behind this turn

This being the last round, I need to think about turn order — after me come felix and mara, so any offers I make now could still be accepted by them before the game ends, but there's no further round after this for me to benefit from reciprocal offers myself. I'll decline O52 since I need the rope, and offer both felix and mara 10 fish each for rope 1 — felix already turned down 6, so a higher offer might land, and since mara acts last, I only need one of them to accept.

Felix

  • Accepts Nia’s offer: gives rope 1 for fish 10. O54
  • Declines Theo’s offer. O53
Behind this turn

Since it's the last round and my rope has no further use, completing a net is unrealistic now. Accepting Nia's offer of 10 fish for my 1 rope is pure gain with no downside, so I'll take that deal.

Mara

  • Declines Nia’s offer. O49
  • Declines Nia’s offer. O55
Behind this turn

Giving up rope 1 would cost me the rope I need for the smokehouse, so I should decline both offers. Since it's the last round, there's nothing else worth accepting.