TinySol (formerly MonoSol) is a free tiny Klondike Solitaire game designed for good playability on vintage computers, especially those with monochrome screens.

Download TinySol v1.3 (5/25/2026)

Download 640 winnable savegame files (5/25/2026)

Upon launch the game begins and instructions are displayed until the first input is made.

Features

Fits anywhere (only 3KB) Runs on any PC (8086 and up) Runs on any graphics (CGA, AT&T, EGA, VGA) Change video modes on the fly

Play with keyboard or mouse In-Game state Save/Restore (undo) Save/Load game to disk Auto-finish game when possible Scoring (Microsoft style, sans timer)

Compatibility

TinySol should run on most DOS computers.  It has been tested on the following.

• Real Hardware 8088, 640KB, CGA, MS-DOS 3.30 (IBM 5150)
• Real Hardware 286, 640KB, CGA/ATT, MS-DOS 3.30 (GRiDCase 1520)
• Real Hardware Pentium 233, MS-DOS 6.22, VGA
• Emulation 8086, 64KB RAM, MS-DOS 2.0, CGA
• Emulation DosBox (primary testing during development)

Supported Video Modes
Name	INT 10h mode	Resolution	Key
CGA	06h	640x200x2	F1
AT&T 6300	40h	640x400x2	F2
EGA	10h	640x350x16	F3
VGA	12h	640x480x16	F4

The video mode should be automatically detected except for 640×400 AT&T 6300 mode which will be automatically selected only for some GRiD computers. Modes can be switched on the fly using the F1-F4 keys.

NOTE: For DosBox users, DosBox doesn’t seem to support AT&T 6300 but the other modes work fine.

NOTE: CuteMouse, a popular DOS mouse driver, doesn’t seem to support the AT&T 6300 video mode.  The mouse functions but the cursor is not visible so I tested using the Microsoft Mouse driver v6.   DosBox doesn’t require a mouse driver (it’s integrated).

TinySol was written in x86 Assembly in early 2022, assembled with NASM, and was my first attempt at writing a tiny game.  The goal was a game that would look sharp in 640x400x2 mode on GRiD gas-plasma displays yet also be small enough to include in ROMs without much consequence.

NOTE: 640x400x2 mode is referenced by many different names.  AT&T 6300, Olivetti M24, Compaq Portable III, Doublescan CGA, and more.

Keyboard Controls (tinysol.com or tinysolm.com)
1-7		Tableau piles
A-D		Foundation piles
8/Space		Deck pile, deal 3 cards
9/Enter		Draw pile, select card
Tab		Auto-send selected card to a foundation pile
Up/Down		Modify card selection within a pile
+/-		Save/Restore game state
f		Auto-Finish, sends all cards home if possible
n		New game
x		Exit
s		Save current game to file named ‘save’
F1-F4		Change video mode (CGA, AT&T 6300, EGA, VGA)

Mouse Controls (tinysolm.com supports mouse)
Left Click		Select piles (source or destination)
Right Click		Auto-send selected card to a foundation pile
Click the N		New game
Click the X		Exit

Version History
v1.0	03/2022	Initial release
v1.1	11/2022	fixes, optimizations, performance, features (added ending screen)
v1.2	05/2024	fixes, optimizations, features (scoring, save to file, auto-finish)
v1.3	05/2026	fixes, optimizations, multiple builds (full, med, tiny, micro).  First distributed as hard copies at VCFSW 2026.

TinySol in the Wild

Here are some instances of TinySol out and about.

• 5/30/2026 (VCFSW) TinySol 1.3 ran wonderfully on Victoria Crenshaw’s decked out 286 running FreeDOS.  Executed from a 5.25″ 360KB floppy and with mouse support it performed great!
• 5/30/2026 (VCFSW) TinySol 1.3 ran on Jerry Parker’s beautifully restored Zenith Heath/Z-110 8088 with only 256KB of memory.  Executed from a 5.25″ 360KB floppy.
• 5/29/2026 TinySol 1.3 first premiered as hard copies at the Vintage Computer Festival Southwest 2026 in Texas before being published for download on 6/1/2026.  Sixteen copies were distributed on 360K, 1.2MB, 720K, and 1.44MB diskettes with hand drawn artwork and user’s manuals printed on vintage blue bar tractor feed paper using my dot matrix Panasonic KX-P1624 and IBM 5160.
• 2024-01-25 A user, Joseph, running version 1.1 emailed saying, “You have no idea how hard I have been looking for a DOS Klondike game that works with just the keyboard and draws 3 cards at a time.”  He said VGA mode didn’t work on his BOOK 8088 but EGA does.  For improved compatibility TinySol 1.2 switched to color EGA and VGA modes instead of pure monochrome.
• 2022-10-11 Óscar Toledo G. (nanochess.org) demo’d an early version 1.0 in a Youtube video.  Óscar also helped identify a sprite rendering issue that manifested on his VirtualBox for Mac but not VirtualBox for Win/Linux, DosBox, VMWare, Parallels, or real hardware.  It was resolved by clearing the direction flag before calling Int 10h.