Wharfon Locke the sea-lion harbourmaster and Riddla Quayle the clockwork kingfisher inspecting a glowing brass-and-ceramic puzzle table on the sunlit granite quay of RiddleWharf.

RiddleWharf

Chart the clues, prove the logic and unlock the tidal gates.

THE HARBOURMASTER'S MANIFEST OF BROWSER LOGIC & PUZZLES

Where white chalk cliffs meet the cobalt swell, the great sluice-gates of RiddleWharf turn only on proven deduction, geometric reckoning and mechanical craft. Harbourmaster Wharfon Locke and Chief Navigator Riddla Quayle have logged nine free-to-play browser puzzles across three working berths, each verified against its publisher's official information with full details on in-game purchases, advertising, accounts and chat.

BERTH I — THE DEDUCTION & CIPHER QUAY Suspect Manifests, Cryptic Grids and Hidden Equations

Beside the brass manifest ledger on the lower granite quay, Wharfon Locke refuses to turn his harbour-key until every statement is cross-examined without guesswork. These three vessels trade in daily elimination, sharp wordplay and six-try arithmetic deduction.

Wharfon Locke, the Steller sea-lion harbourmaster in a vermilion coat with brass astrolabe rings and a glowing amber lantern-staff.

A mahogany and brass harbour deduction grid of carved suspect busts linked by copper clue wires and glowing green and crimson verdict tokens.

Clues by Sam

Ad Artis Oy · Daily Logic & Suspect Deduction

Inspect a grid of suspects and determine, one by one, who is innocent and who is a criminal. Every uncovered face yields fresh testimony, guessing is strictly forbidden, and each decision must follow logically as the daily puzzles grow harder across the week.

Free to play · Optional subscription · Includes in-game purchases

Ads in game: No
Account needed: Optional
Chat with other players: No
Facts checked: 26 October 2026

Source & rating

No PEGI rating published for the browser version · Based on Ad Artis Oy's official information, checked 26 October 2026.

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A mechanical walnut and brass crossword grid of ivory and black ceramic squares beside a fountain pen and teacup in a sunlit harbour bay window.

The Guardian Crosswords

Guardian News & Media · Cryptic, Quick & Archive Crosswords

Tackle daily British crosswords straight from your browser across quick, mini, quiptic, quick cryptic, cryptic, prize, genius and weekend formats. Search the dated archive at your leisure, test your vocabulary against classic setters, or step across to the sudoku tables.

Free to play · Optional subscription · No in-game purchases

Ads in game: Yes
Account needed: Not stated by the publisher
Chat with other players: Yes
Facts checked: 26 October 2026

Source & rating

No PEGI rating published for the browser version · Based on Guardian News & Media's official information, checked 26 October 2026.

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A brass harbour calculator machine showing six rows of glazed ceramic tiles glowing in sea-green, amber and slate-blue beside a sunlit sluice gate.

Nerdle

Richard Mann · Six-Try Equation Deduction

Uncover a hidden mathematical equation in six tries using colour-coded tile feedback that confirms which digits and operators belong in the solution. Every guess must calculate properly, and the site hosts more than twenty additional number and arithmetic variants.

Free to play · No in-game purchases

Ads in game: Yes
Account needed: Optional
Chat with other players: Not stated by the publisher
Facts checked: 26 October 2026

Source & rating

No PEGI rating published for the browser version · Based on Richard Mann's official information, checked 26 October 2026.

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BERTH II — THE SEXTANT & RELAY LOFT Number Counterweights, Compass Arcs and Logic Gates

High among the vermilion gantry cranes, Riddla Quayle sights along her golden compass-calipers to test the structural machinery of the port. Step into the chart-loft for nine-by-nine number grids, classical straightedge-and-compass geometry and foundational computer engineering built from raw logic gates.

Riddla Quayle, the clockwork kingfisher surveyor with cobalt plumage, brass sextant-wings and golden compass-calipers.

A nine-by-nine stone and verdigris-bronze harbour lock grid divided into nine three-by-three basins filled with glowing sea-glass and brass blocks.

Sudoku.com

Easybrain · Classic & Killer Number Grids

Complete the nine-by-nine grid so that every row, column and three-by-three box holds the digits one to nine without repetition. Switch between Classic grids and cage-sum Killer modes across multiple difficulty tiers, accompanied by daily challenges and regular tournaments.

Free to play · No in-game purchases

Ads in game: Yes
Account needed: Not stated by the publisher
Chat with other players: Not stated by the publisher
Facts checked: 26 October 2026

Source & rating

No PEGI rating published for the browser version · Based on Easybrain's official information, checked 26 October 2026.

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Brass compass-dividers and a steel straightedge inscribing luminous cyan and gold geometric circles and triangles onto a coastal slate drafting table.

Euclidea

HORIS International Limited · Straightedge & Compass Geometry

Construct precise geometric figures using only an idealised straightedge and compass. Every bisector, tangent and inscribed polygon is scored in lines and elementary moves, rewarding the most economical proof while turning your mastered constructions into shortcut tools for deeper theorems.

Free to play · No in-game purchases

Ads in game: No
Account needed: Optional
Chat with other players: No
Facts checked: 26 October 2026

Source & rating

No PEGI rating published for the browser version · Based on HORIS International Limited's official information, checked 26 October 2026.

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An intricate wall of brass logic gates, copper relays and glowing turquoise and amber vacuum-bulbs inside a sunlit coastal lighthouse tower.

NandGame

Olav Junker Kjær · Boolean Logic & Computer Architecture

Start with a single primitive NAND relay and wire together increasingly capable components through a sequence of engineering tasks. Step by step, you assemble logic gates, arithmetic units, memory registers and control circuits until you have built a working programmable computer.

Free to play · No in-game purchases

Ads in game: No
Account needed: No
Chat with other players: No
Facts checked: 26 October 2026

Source & rating

No PEGI rating published for the browser version · Based on Olav Junker Kjær's official information, checked 26 October 2026.

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BERTH III — THE SLIPWAY & CHART-TABLE PIER Sliding Tallies, Shared Jigsaws and High-Speed Stacks

Down on the seaward slipway, glazed ceramic number-slabs and interlocking timber crates move with the rhythm of the tide. Choose between a solitary four-by-four tally, a calm daily jigsaw table you can share with other players, or rapid falling-block matches against opponents worldwide — then climb to the Watchtower Ledger to compare all nine puzzles by session pace and discipline.

A four-by-four harbour rail grid where sliding timber, copper and gilded brass cargo cubes collide and merge into a glowing golden master cube.

2048

Gabriele Cirulli (site operated by 2048 USA B.V.) · Sliding Number-Tile Puzzle

Slide numbered tiles across a four-by-four grid so matching pairs fuse into double their value, planning each directional shift to keep the board clear until you forge the 2048 tile in Gabriele Cirulli's original web version.

Free to play · No in-game purchases

Ads in game: Yes
Account needed: No
Chat with other players: Not stated by the publisher
Facts checked: 26 October 2026

Source & rating

No PEGI rating published for the browser version · Based on Gabriele Cirulli (site operated by 2048 USA B.V.)'s official information, checked 26 October 2026.

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Interlocking painted porcelain and brass jigsaw pieces coming together on a circular oak chart-table to form a coastal lighthouse relief map.

Jigsaw Explorer

Carolina Road Media, LLC · Solo & Multiplayer Jigsaw Tables

Spread hundreds of interlocking pieces across a clean virtual felt table with curated daily photographs and a Friday mystery puzzle whose picture stays hidden until completion. Assemble puzzles solo, invite other players into a shared multiplayer link, or cut custom jigsaws from your own photos.

Free to play · No in-game purchases

Ads in game: Yes
Account needed: No
Chat with other players: No
Facts checked: 26 October 2026

Source & rating

No PEGI rating published for the browser version · Based on Carolina Road Media, LLC's official information, checked 26 October 2026.

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A vertical iron-and-brass harbour tower where glowing colourful four-block sea-glass shapes drop along rails and clear in a flash of golden light.

TETR.IO

osk · Solo & Real-Time Multiplayer Block Stacker

Rotate and drop falling geometric pieces at high speed to clear lines in solo score-attack trials or real-time online matches against other players worldwide. Climb the competitive ranked ladders, track global leaderboards and join recurring seasonal events straight from your browser.

Free to play · Includes in-game purchases

Ads in game: Yes
Account needed: Optional
Chat with other players: Yes
Facts checked: 26 October 2026

Source & rating

No PEGI rating published for the browser version · Based on osk's official information, checked 26 October 2026.

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