Basho Bash Sumo Wrestling

Basho Bash is "A fast paced Sumo simulation that provides all the thrills and spills of the real thing."  It is a free download created by Joe Bryan, aka statfreak, and is available here: Basho Bash PDF

Before getting into the nuts and bolts, I thought a brief summary of the terms you'll most likely see would be useful.

Basho: A tournament held six times a year in various cities in Japan. For this replay, I will be using the provided Kyushu Basho from November 2008.
Tachiai: This is the opening of a match, where both rikishis move towards each other and engage.
Mawashi: The coloured belt worn by competitors.

Yorikiri: A strength-based attack that has both men locked with one pushing his opponent straight out of the ring while keeping a firm grip on the mawashi. A common way to win.
Oshidashi: Like the yorikiri, but without hanging on to the mawashi.
Okuridashi: A push-out from the rear.
Tsukidashi: A rhythmic pushing motion is used from the front to eject the opponent from the ring.

Uwatenage: The first of many technical maneuvers, the uwatenage is an overarm throw.
Hatakikomi: A simple more that takes advantage of those who charge forward too low, as the winner slaps his opponent, adding to his momentum.
Hikiotoshi: The winner pulls down his opponent while backing away.
Tsukiotoshi: A hand is placed on the upper body and used to thrust the loser down to the clay.
Yoritaoshi: A more technical version of the yorikiri, so grip is maintained on the mawashi
Oshitaoshi: Almost a tsukiotoshi in that the force comes from the front to take the loser down.
Sukuinage: Another throwing technique that does not need the use of a mawashi hold.
Shitatenage: An underarm throw whereby the attacker pulls straight down while turning away.
Uwatedashinage: The difference between this and the more common uwatenage is a forward pull.
Kotenage: A risky move that can lead to elbow and shoulder injuries, this armlock throw is often used in more desperate situations.
Katasukashi: Placing one hand inside and outside the shoulder blade, the loser can then be pulled down and forward.
Okuritaoshi: A push down coming from behind.

A lot more information can be found at the excellent Sumo Forum

The game is a simple one. Take one pack of cards, remove the jokers, and separate them into two piles: one for face cards, one for the rest, and then you're good to go. Turning over one face card and one non-face, then comparing them with the charts, gives you a result in the Tachiai. If both men remain in the ring, then play continues with turns of the non-face cards, referencing the few charts until a winner is found. A winning technique is then determined with a final card.

The board is of course circular, filled with hexes, and a hex-counter is used to represent the combatants; one red and one black. The black rikishi is kind of a favourite for that match.

It is a very quick replay game, which includes rules for making your own Basho's to replay real events.