funman300 8a5fa8751c feat(core,engine): Klondike solver and "Winnable deals only" toggle
Closes Quat investigation #1. Today some Klondike deals are
unwinnable from the start and the player has no signal that the
deal they were given is solvable. A new Settings → Gameplay toggle
"Winnable deals only" (default off) makes the engine retry seeds
at deal-time until the solver returns Winnable, up to a cap.

Solver

solitaire_core::solver is a hand-rolled iterative-DFS solver with
memoisation on a 64-bit canonical state hash. Move enumeration is
priority-ordered: foundation moves first (zero choice when an Ace
or rank-up exists), inter-tableau moves second, waste-to-tableau
third, stock-draw last. The draw is skipped when the cycle counter
shows we've recirculated the entire stock without progress —
Klondike's deterministic stock cycle means further draws can't
unlock anything new.

Two budget knobs (move_budget = 100k, state_budget = 200k by
default) cap pathological cases at Inconclusive; the caller treats
Inconclusive as "winnable" so the player isn't penalised for the
solver giving up. Median solve time is 2 ms; pathological
inconclusives top out near 120 ms.

Switched from recursive to iterative DFS after a real-deal solve
overflowed Rust's default 8 MB thread stack. Behaviour identical;
the change is invisible to callers.

Pure logic — solitaire_core has no Bevy or I/O. Same input always
yields the same SolverResult.

Settings

Settings.winnable_deals_only is a #[serde(default)] bool; legacy
files load to false. SOLVER_DEAL_RETRY_CAP = 50 caps the retry
loop. The Settings → Gameplay toggle reads as "Winnable deals only"
with a "(may take a moment when on)" caption.

Engine integration

handle_new_game's seed-selection path now branches on the toggle.
When on AND mode is Classic AND no specific seed was requested
(daily challenges, replays, and explicit-seed requests bypass the
solver), choose_winnable_seed walks seed N, N+1, N+2, … calling
try_solve until it finds Winnable or Inconclusive. If the cap is
hit without a verdict, the latest tried seed is used so the player
always gets a deal rather than spinning forever.

19 new tests (11 solver, 3 settings, 5 engine including the
choose_winnable_seed unit). Two ignored bench/scan helpers
(solver_bench, find_unwinnable) for ad-hoc profiling.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-05 23:02:22 +00:00
2026-04-29 21:59:38 +00:00

Solitaire Quest

A cross-platform Klondike Solitaire game written in Rust, with a card-theme system, full progression (XP / levels / achievements / daily challenges), and optional self-hosted sync so your stats follow you across machines.

Features

  • Klondike Solitaire — Draw One and Draw Three modes; foundations are unlocked (any Ace lands in any empty slot, the slot then claims that suit)
  • Card themes — bundled hayeah/playing-cards-assets default plus user-installable themes (drop a directory under the data dir or import a zip from Settings → Cosmetic)
  • Modern HUD — reserved top band keeps cards from crowding the score readout; the action bar auto-fades when the cursor leaves it so it can't compete with the play surface
  • Drag feel — every legal drop target is highlighted in green during drag; cards cast a soft drop shadow that lifts when picked up; the stock pile shows a remaining-count chip so you can see how close you are to a recycle
  • Keyboard navigation — Tab cycles focus through buttons, arrow keys move within picker rows, Enter activates; works across every modal and the HUD action bar
  • Progression — XP, levels, unlockable card backs and backgrounds
  • 19 Achievements — including secret ones
  • Daily Challenge — server-seeded so every player worldwide gets the same deal
  • Leaderboard — opt-in, powered by your own self-hosted server
  • Special Modes (unlocked at level 5): Zen, Time Attack, Challenge
  • Sync — pull/push stats across devices via a self-hosted server
  • Color-blind mode — blue tint on red-suit cards alongside the suit glyph

Building

Prerequisites

  • Rust stable toolchain (rustup install stable)
  • Linux: libasound2-dev libudev-dev libxkbcommon-dev
  • macOS: Xcode Command Line Tools
# Fast development build
cargo run -p solitaire_app --features bevy/dynamic_linking

# Release build
cargo build -p solitaire_app --release
./target/release/solitaire_app

Controls

Every action also has a visible UI button — keyboard shortcuts are optional accelerators.

Key Action
Left click / drag Move cards
Double click Auto-move card to its best legal destination
Right click Highlight legal moves for a card
Space / D Draw from stock
U Undo
H Hint (highlight a legal move)
N New game
Z Zen mode
G Forfeit (during pause)
Tab / Shift+Tab Cycle keyboard focus
Enter Activate focused button / auto-complete (when badge is lit)
Esc Pause / dismiss modal
F1 Help / controls
F11 Toggle fullscreen
S / A / P / O / L / M Stats / Achievements / Profile / Settings / Leaderboard / Menu

Card themes

The default theme ships embedded in the binary, so the game runs self-contained with no external assets. To install another theme, drop a directory containing a theme.ron manifest plus 53 SVG files (52 faces + 1 back) under the platform data dir's themes/ folder, or import a zip from Settings → Cosmetic. The picker chip lights up the moment a new theme is registered. Themes are SVG-based, so they rasterise cleanly at whatever resolution the window happens to be.

Sync Server (optional)

To sync stats across machines, run the self-hosted server. See README_SERVER.md for setup instructions.

Once the server is running, open Settings → Sync Backend, enter the server URL and your username, and register an account from within the game.

Running Tests

# All tests (982 passing as of v0.11.0)
cargo test --workspace

# Just game logic (no display required)
cargo test -p solitaire_core -p solitaire_sync -p solitaire_data -p solitaire_server

# Lint
cargo clippy --workspace --all-targets -- -D warnings

Credits

Built on Bevy and the wider Rust ecosystem (Tokio, Axum, sqlx, Serde, kira, and many more). Card faces come from hayeah/playing-cards-assets (MIT, derived from the public-domain vector-playing-cards library); the default card back is original work; the UI font is FiraMono-Medium (OFL). All audio is synthesized programmatically by this project. See CREDITS.md for the full list and license details.

Changelog

See CHANGELOG.md.

License

MIT — see LICENSE.

S
Description
A Klondike solitaire game built in Rust with Bevy, targeting Android and Linux desktop. Features classic card rendering, draw-one/draw-three modes, score tracking, undo/redo, daily challenges, and auto-complete detection.
https://klondike.aleshym.co/
Readme MIT 45 MiB
v0.39.0 Latest
2026-05-19 23:58:42 +00:00
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