glchess: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/glchess - from package: gnome-games-extra

You may install the required package with command yum install {package}

Error in other languages:
glchess: bevel nie gevind nie
glchess: comandă negăsită
glchess: comando não encontrado
glchess: commande introuvable
glchess: command not found
glchess: käsku ei ole
glchess: không tìm thấy lệnh
glchess: komanda nerasta
glchess: Kommando nicht gefunden.
glchess: kommandot finns inte
glchess: komut yok
glchess: nie znaleziono polecenia
glchess: níor aimsíodh an t-ordú
glchess: no se encontró la orden
glchess: no s'ha trobat l'ordre
glchess: opdracht niet gevonden
glchess: parancs nem található
glchess: perintah tidak ditemukan
glchess: príkaz nenájdený
glchess: příkaz nenalezen
glchess: команда не найдена
glchess: командата не е открита
glchess: 命令找不到
glchess: コマンドが見つかりません