System for assessing life and death in games of go

Abstract

A system is for assessing life and death in go games played on a computer. and includes an input-receiving unit for receiving input from a player, an assessment unit that assesses the life and death of target stones, and an output unit for outputting the results of the assessment in the assessment unit. The assessment unit receives input specifying one or more target stones, specifies the points on the board where a boundary and a board edge are within a prescribed distance from each other, revises the assessment area by expanding the assessment area, assesses an optional stone in the post-revision assessment area to be alive if said stone escapes and was a target stone, and if said stone was not a target stone, performs a life and death assessment after adding the condition that said stone is not captured and a target stone connected to said stone is alive.

1 . A system for assessing life and death in a game of Go, the system for assessing life and death characterized in being provided with:
 an input-receiving unit for receiving input from a player;   an assessment unit for assessing whether a target stone is alive or dead; and   an output unit for outputting a result of a life and death assessment in the assessment unit,   the assessment unit   receiving input designating at least one of the target stones;   specifying points on a board where an outside perimeter and a board edge are separated by no more than a predetermined distance, and expanding an assessment area in a direction of an outside perimeter area according to the distance of separation, thereby revising the assessment area; and   performing, when any stone in the revised assessment area has escaped, an assessment of the stone as being alive in cases where the stone is a target stone, or, in cases where the stone is not a target stone, executing a process for assessing life and death in which a condition is added that the target stone linked to the stone is alive, where the stone is considered to be uncapturable.   
     
     
         2 . The system for assessing life and death in a game of Go according to  claim 1 , characterized in that the assessment unit
 specifies the points on the board where the outside perimeter and the board edge are separated by no more than the predetermined distance, expands the assessment area in the direction of the outside perimeter area according to the distance of separation, and, in the case in which the expanded points were already included in the assessment area, designates the outer perimeter thereby enclosed in the assessment area as being in the assessment area, whereby the assessment area is revised; and   performs, when any stone in the revised assessment area has escaped, an assessment of the stone as being alive in cases where the stone is a target stone or, in cases where the stone is not a target stone, executes a process for assessing life and death in which a condition is added that the target stone linked to the stone is alive, where the stone is considered to be uncapturable.   
     
     
         3 . A program for assessing life and death in a game of Go, the program causing a computer to act as:
 an input-receiving unit for receiving input from a player;   an assessment unit for assessing whether a target stone is alive or dead; and   an output unit for outputting a result of a life and death assessment in the assessment unit,   the program for assessing life and death characterized in that   the assessment unit   receives input designating at least one of the target stones;   specifies points on a board where an outside perimeter and a board edge are separated by no more than a predetermined distance, and expands an assessment area in a direction of an outside perimeter area according to the distance of separation, thereby revising the assessment area; and   performs, when any stone in the revised assessment area has escaped, an assessment of the stone as being alive in cases where the stone is a target stone, or, in cases where the stone is not a target stone, executes a process for assessing life and death in which a condition is added that the target stone linked to the stone is alive, where the stone is considered to be uncapturable.