Solitaire

Klondike
The classic. Seven tableau piles, four suits to build from Ace to King.
FreeCell
All cards in view from the start. Four free cells to maneuver. Almost always winnable.
Spider
Two decks, ten columns, four suits. Build eight complete sequences to win.
Statistics
Klondike 00:00 Undo: 3
Card artwork: Noto Sans Symbols2 via Wikimedia Commons (OFL)