Peter Gal: Pentagon to triangle puzzle Outdoors One slides them around inside

One slides them around inside the frame and rotates them to try to get them out of the frame

first principles

then continues with a few problems showing how the particular technique has been used in a professional game

you'll never forget it

which allows for the brass line checker to be used when players are in dispute about whether the coin is within the bay or not

Peter Gal: Pentagon to triangle puzzle Outdoors One slides them around insideLike the rest of the collection, the wooden pieces are kept in a wooden tray, within a booklet bound with a colourful linen finish with contrasting colour spine. Including packaging, puzzle measures 150mm x 100mm x 12mm