Omweso

ゲーム種別: Four-row mancala (two players) without stores; continuous relay sowing around own territory; frontal column captures with reverse (clockwise) option from leftmost pits; tournament match-point scoring (bulijo, okutema, akawumbi).

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概要

Omweso (frequently rendered as Mweso or Mweisho, derived etymologically from the Swahili michezo, meaning "games") is the historic royal mancala of the Baganda and the national board game of Uganda. According to Ganda oral tradition, the game was introduced during the 16th century by the legendary Bachwezi rulers of the Bunyoro-Kitara dynasty. For centuries it formed a central component of royal ceremony: reigning Kabakas of Buganda played Omweso during the sacred okwesa investiture rites atop Budo Hill, a royal tradition stretching across six centuries. King Mutesa I (who ruled Buganda from 1856 to 1884) was celebrated as a master strategist and fervent patron of the board. Western scholarship first documented its sophisticated rules in 1934 through R. S. Shackell. Following the return of Kabaka Sir Edward Mutesa II from British exile in 1955 and bolstered by the cultural renaissance of the Bataka Movement, Omweso evolved from an aristocratic court pastime into a vibrant, competitive national sport governed by formal tournament circuits.

盤面

• 列: Four
• 1列の穴の数: 8 (32 pits total)
• 貯蔵庫: None
• Seeds: 64 undifferentiated counters called empiki (traditionally the hard, polished black seeds of the omuti gw'empiki tree). At the outset, each player receives 32 seeds; in standard play, these are arranged as 4 seeds per pit across one row, or custom-distributed across the player's 16 holes according to tactical preference (typically capped at 10 seeds in any single hole).
• Territory: Each player exclusively owns the 16 pits on their side of the board (two rows of eight holes).

遊び方

• The first player is determined by lot; each player sets up their 32 seeds within their own 16 pits, after which the first player initiates the game.
• A player selects any friendly pit holding two or more seeds and sows them one by one counter-clockwise around their own 16-hole circuit. Sowing stays entirely within the player's own half of the board.
• If the final seed drops into a previously occupied hole, all seeds in that pit (including the newly arrived counter) are lifted and distributed in a subsequent relay lap before the turn passes. Relay sowing continues until the final seed lands in an empty hole.
• Special opening sowings (okwesera, also called okukoneeza in tournament play): Prior to the first capture of the match, a player holding exactly three seeds in a pit may sow them by dropping two seeds into the immediately adjacent pit and one into the hole beyond, terminating the turn after this single lap without relay or capture.
• Modes of play:
  • Ekyokubala ("counting"): deliberate, classical play with untimed calculation.
  • Ekisibé: formal contractual play where players exchange an opening seed, signifying a binding agreement that disallows move retractions.
  • Ekyobutabal: rapid blitz play allowing only three seconds of deliberation per move, standard in competitive tournaments and urban clubs.

取り込み

• If the last seed of a lap lands in an occupied hole in the player's inner row, and both opposing pits in that column contain seeds, all counters from the adversary's inner and outer holes in that column are captured.
• Seized counters are re-sown starting from the pit where the capturing lap began.
• Opening move capture restriction: Neither player is permitted to capture seeds on their first turn of the match. An eligible landing on turn 1 continues as a normal relay without taking opposing stones.
• Reverse capturing: Instead of counter-clockwise sowing, a player may sow clockwise from any of their four leftmost pits if and only if that reverse lap results in a direct capture. In extended moves, players may combine forward relay laps and reverse capturing laps whenever the necessary conditions are met.

終了と勝利

• A match is contested over multiple games until a player reaches 12 points:
  • Okwa bulijo (1 point): the regular victory, achieved when the opponent is left without a legal move (all opponent pits contain 0 or 1 seed).
  • Okutema (2 points, "cutting off the head"): achieved by completely clearing the opponent's front row or capturing all four outer corner pits (Emitwe-Ebiri).
  • Akawumbi (12 points): a grand slam triumph achieved by stripping every single counter from the opponent's territory, concluding with a capture in an end pit, instantly winning the entire match.
• Additional tournament conditions: Akakyala (scoring two separate captures before the opponent scores their first, worth 2 points) is an optional winning condition agreed before play; Okukoneeza names the pre-capture three-seed special sowing (okwesera) described above, not a separate winning condition.
• In the rare event of an infinite, non-terminating relay cycle, tournament rules permit up to three minutes to resolve the move before the game is annulled.

メモ

• Historical lore celebrates Mukasa, the Katikkiro (prime minister) under King Mutesa I, as one of the most formidable grandmasters in 19th-century East Africa. Mutesa I's personal heirloom board was preserved at the Kasubi Royal Tombs (a UNESCO World Heritage site) until the tragic complex fire of March 2010.
• Traditional etiquette and taboos historically reserved Omweso for daytime play, strictly prohibiting nocturnal games, while royal customs initially discouraged participation by women and non-aristocrats.
• In 2001, computational mathematician Steven Mayer formulated the "Mayer Test" to analytically detect whether given board configurations can sustain endless sowing loops.
• Fast-paced tournament play (Ekyobutabal) challenges masters to commit to complex, multi-lap calculations within a strict three-second window per move.

Source: Mancala World – Omweso

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