Guru Logic is a 2003 puzzle game for the MSX from the group Karoshi Corporation. The date deserves emphasis: the MSX had ended its commercial life back in the late eighties, so a 2003 title is not a period release but a new game written for old hardware.

That is a long tradition in the Spanish-speaking MSX community. Groups of enthusiasts publish new games on tape and cartridge, compete in coding showcases and push the machine further than its original developers ever did. Karoshi Corporation is one of the names that recurs in that scene.

The design itself uses a top-down view and the arranging of objects within a bounded field. Puzzle games are ideal for limited hardware, because they need neither many moving objects nor fast redraw; the whole difficulty can be built from the placement of elements and from the rules governing how they behave once moved.

For a retro catalogue these modern titles carry particular value. They show what a platform looks like when programmers know it in detail and are not hurried by a publisher's deadline. The year 2003 is therefore not a data error but a meaningful fact: it says the game was made by choice rather than by market necessity, and that its authors could take as long as they needed. The result often feels technically more advanced than games from the years the machine was actually on sale.

For this entry OldGame.cz gives the year it was made, the name of the group behind it and images; direct browser play is not part of it so far.