In a IPP special of his newsletter "PUZZLETOPIA" Nob published this L Puzzle12 pieces.This puzzle is a copy produduced by puzzle design Ton Delsing Front black. Back white. Put 12 pieces into  a 7x7 square. Black side up.Rotation are permitted, turnover is forbidden.Inlaid letters. Material Acrylic.

A puzzle from 1898.  Copy of "Le Fermier Avisé" from "The book of ingenious & diabolical puzzles", Jerry Slocum and Jack Botermans Place the 9 cardboard pieces in a square of 3 x 3 pieces. Where 2 numbers lie against each other, the sum must always be the same. So: In each square cage the same number of chicks. To make the puzzle more beautiful I made adjustments,

Copy produced by puzzle design Ton Delsing.8 pieces. Material acrylic. Match the colours in a 4x4 square.