Alea evangelii

Lore & Background

The manuscript CCC MS 122 is composed of 117 folios, including the Eusebian Canons, the Alea Evangelii diagram with two pages of Latin explanation, and the Vulgate Gospels with St. Jerome's prologue. Written in an Irish hand and dated to the eleventh century, the description states the game was invented at the court of King Æthelstan of England by an anonymous Frank and Israel the Grammarian. The diagram and explanation were brought to Ireland by Dub Innse, bishop of Bangor (d. 953). A photograph of the game is the frontispiece of The Times of St Dunstan by J. Armitage Robinson, who reproduced and discussed the text. Robinson copied an error by the eleventh-century scribe, who misidentified one inventor as a Jewish scholar—a mistake later repeated by modern scholars. In fact, the scribe did not describe any inventor as a Jewish scholar; the error arose from misinterpreting 'Israel' as a Jewish scholar, which is factually inaccurate.

Reader's Guide

The Alea evangelii is significant as a rare documented example of a tafl game with a detailed Christian allegory superimposed on a pre-existing secular game. The manuscript's diagram assigns each corner and border to one of the four Evangelists, with 67 pieces derived from the Eusebian Canons. Four red pieces are labeled as 'different men' related to the passion of Christ, and one black piece (E13) represents 'the Unity of the Trinity'. The game's original secular nature is indicated by a passage mentioning 'dukes and counts, defenders and attackers, city and citadel, and nine steps twice over.' Scholars agree the Christian meaning is a moralization of a siege game. The number of pieces (excluding the central king) is a multiple of twelve, consistent with other tafl games like tawlbwrdd (36 pieces) and tablut (24 pieces), leading to the assumption of 48 attackers and 24 defenders. However, the manuscript does not differentiate sides on the diagram. The mention of 'dukes and count' is puzzling, as tafl games typically have only a king and ordinary pieces; Bayless suggests Israel may have borrowed the idea of different ranks from chess. While most scholars assume a 19×19 board, Barbet-Massin argues the actual playing area is 17×17.

Did You Know?

• The game board is identical to a standard 19×19 Go board.
• The manuscript was written in an Irish hand and is commonly dated to the eleventh century.
• The game was allegedly invented at the court of King Æthelstan of England by an anonymous Frank and Israel the Grammarian.
• The diagram and explanation were brought to Ireland by Dub Innse, bishop of Bangor (d. 953).

The Manuscript and Its Journey

The primary source for Alea evangelii is Corpus Christi College manuscript 122, an 117-page volume written in an Irish hand and generally dated to the eleventh century. The codex is organized into three major components: the ten Eusebian Canons that map agreements and divergences among the four Gospels, a diagram of the game accompanied by two pages of explanatory Latin, and the full Vulgate text of the Gospels introduced by Jerome's prologue. According to the manuscript's own narrative, the game was devised at the court of King Æthelstan of England (r. 924–939) by two learned figures, an unnamed Frank and Israel the Grammarian, one of the era's foremost European intellectuals. The diagram and its accompanying text were carried to Ireland by Dub Innse, bishop of Bangor, who died in 953. J. Armitage Robinson later featured a photograph of the board as the frontispiece of his book The Times of St Dunstan and reproduced the Latin text. In doing so, however, he inadvertently repeated a scribe's mistake that mislabeled one of the two inventors as a Jewish scholar. The medieval Latinist Michael Lapidge later clarified that the name in question is simply Israel the Grammarian, the historical figure.

The Christian Allegory Layered on the Board

The board's sixty-seven pieces are not arranged arbitrarily but are tied directly to the Eusebian Canons: each canon contributes a number of pieces equal to the square of its column count, and those pieces are clustered together on the board, identified by a cross and the canon's number. Every corner and border of the diagram is assigned to one of the four Evangelists. Four pieces are painted red while all others remain black; the manuscript calls them 'different men,' with two linked to John and one to Mark, and they are additionally labeled as connected to the passion of Christ. A single black piece, designated 'the primary man,' belongs to no evangelist and symbolizes the Unity of the Trinity. The central '1' is said to represent the indivisible substance of the Trinity or the supremacy of the first canon. Structurally, Canon I's sixteen pieces form a diamond at the board's heart; Canons II through IV, together with the special pieces, encircle that diamond; Canons V through IX run along horizontal lines; and Canon X's four pieces occupy the four quadrants.

The Tafl Game Beneath the Allegory

Scholars concur that the Christian symbolism in the manuscript is a later moralization grafted onto a game that originally carried no religious meaning. A brief passage near the beginning of the text hints that the underlying game depicted a siege, invoking dukes, counts, defenders, attackers, a city, a citadel, and 'nine steps twice over.' Murray recognized the diagram as a tafl board and adjusted it to restore radial symmetry. The total piece count, excluding the central king, is a multiple of twelve, matching other documented tafl games such as tawlbwrdd with thirty-six pieces and tablut with twenty-four. Following the standard two-to-one attacker-to-defender ratio seen in those games, it is commonly assumed that Alea evangelii involves forty-eight attackers against twenty-four defenders, though the manuscript itself never differentiates the two sides on the diagram. The mention of dukes and counts remains puzzling, since tafl games typically feature only a king and undifferentiated ordinary pieces. Bayless has suggested that Israel the Grammarian, perhaps during a sojourn in Rome, may have encountered the early form of chess with its comites and milites, inspiring the more elaborate piece distinctions found here.

Broader Context and Parallels in Medieval Gaming

Alea evangelii is played on the intersections of an eighteen-by-eighteen square grid, a layout identical to the standard nineteen-by-nineteen board used for Go, and notably larger than the boards of most other tafl games. The proportions of this board are not unique to the manuscript: a physical game-board fragment excavated at Wimoze on the Danish island of Funen displays the same dimensions, providing archaeological corroboration for the textual description. The association of a tafl-type game with Gospel imagery also has precedent. Cormac's Glossary, compiled around 900 CE, describes Fidchell as a 'likeness of a church,' arguing that its four corners, right-angled squares, and black-and-white pieces mirror the four Gospels distributed across the earth, the orderly rows of scripture, and the coexistence of good and evil within the Christian community. Together, these parallels suggest a broader medieval tradition of reading sacred significance into board games, making Alea evangelii a striking point where gaming, theology, and manuscript culture converge in the early Irish and Anglo-Saxon world.