Squash indoors is played with a special racquet on a special court.
We found this gem of a facility at Canyon Road in Los Alamos, New Mexico. To facilitate play, we got permission to tape a tin line at 19 inches and some 5ft service squares at this one wall court / tennis practice wall.
Squash 57 balls are considerably larger and played with a racquetball racquet, which is shorter and has larger hitting surface than a squash racquet.
Taking an indoor game outdoors requires some necessary rule modifications from the indoor rules.
First read the indoor rules, Squash 57 can be played with 2 or with 4 players. Learn to play safely with all the proper safety equipment and health precautions.
Serve has to hit front wall first above the tin. Side walls are then in play after the serve.
One chance to serve.
Upper service line means nothing.
All Lines are in or estimated as in if close.
Short line is short.