"Thank you very much for this beautiful 'Grandmaster' chess computer, which I received yesterday. Naturally, I unpacked and tested it straight away. Everything works as expected. Visually and functionally pleasing, this product truly delivers what it promises on the website. Thank you very much!“

Tobias Graf, CH (Monday, 15th of August 2016)

"I'm a collector of chess computers and I'm glad to have your current top product in my collection. The sensors of the board are working completely satisfactory – the luminosity driven cadmium yellow LED are very pleasing and support the contrast to the attractive board. The chessmen set is ok.“

Volker Lehnert, DE (Friday, 12th of August 2016)

"Your beautiful Pewatronic arrived to me safely today. What a masterpiece. Very nice wood board with beautiful weighted pieces. Very nice attention to detail. All in all this is quite an impressive machine and I hope to enjoy it for many years. Congratulations!"

Frank Tortorice, USA (Tuesday, 24th of May 2016)

 "After I have probably read all that can be read (Explorer Pro-50), I played the first games. I'm thrilled – even though I lost, but therefore my ambition has been aroused! Regarding the amount of levels there is much scope to develop my abilities. Great device!“

Heinz Hirschfeld, DE (Monday, 21th of March 2016)

"My order has arrived. A really attractive chess computer. I played the first game yesterday. Everything is super. A few functions I still have to get to grips with. Thanks for the pleasant dealings with you. Everything worked out well.“


Markus Scheibl, A (Thursday, 7th of January 2016)


"Maybe you remember me – I'm playing for a while with your computer 'Explorer Pro-50' – now on level L7 - no chance – sometimes it is pretty frustrating losing all the time. Warn your customers!

But it is still a lot of fun!!“

Ole Jensen, DE (Thursday, 31th December 2015)

"The chess board 'Explorer Pro-50' is absolutely great and beautiful. For me it emits a noble magic.

Thank you.“


Markus Rufer, CH (Monday, 21th of December 2015)


"I have tested your chess computer 'Explorer Pro-50' – I'm totally delighted."

Ole Jensen, DE (Thursday, 12th of November 2015)

"Bought the Explorer Pro 50. Very nice and beautiful chess computer! The whole process to buy it was very pleasant. My many questions were answered very fast and very detailed. I would recommend this chess computer! I love the idea that my chess board was made by this small firm in beautiful Switzerland."

Bobby, NL (Saturday, 27th of June 2015)

"Since Easter I'm the proud owner of a 'Master Chess Computers'.

The play strength is as expected and the device is just beautiful. Everyone who loves these beautiful Mephisto machines, is 100% right here. The processing is also outstanding. I definitely recommend this computer.

Andreas Pillat, DE (Tuesday, 7th of April 2015)

 "I already thought that these chess computers don't exist anymore these days. But they are still being built, even in Switzerland. And now it's here: the Explorer Pro-50! A really big, beautiful wooden chess computer. Whoever gets excited about chess computers, should definitely get such a device. Thanks to Mr. Waldburger for this great work! I'm more than satisfied.“

Stefan Dietler, CH (Tuesday, 17th of February 2015)

 "A few days ago I received the 'Master Chess Computer' and I love this attractive device. It is a real pleasure to own a chess computer that works with wooden chessmen. It is completely thought-out and masterfully hand crafted. Truly worth its money."

Olivero DiFezero (Friday, 30th of January 2015)

 "Quality and workmanship are outstanding (I've got the tournament chess computer Explorer Pro50). The battery operation works without any disturbing cables, which is very useful. I'm very satisfied.

Thank you!”

Patrik Goebel, CH (Saturday, 22th of November 2014)

"Today my Explorer Pro40 arrived. A very beautiful device. Perfectly hand crafted. Especially commendable is the competent advise before the purchase. A recommendation for all friends of beautiful chess computers. Thank you very much!“

Peter Schmidt, DE (Thursday, 9th of Oktober 2014)

"Yesterday I got my Pro 50. This chess computer is very beautiful.

I absolutely recommend its purchase. The device also works with batteries which is very convenient. Also Mr. Waldburger's advice is absolutely top. I'm really satisfied !!! Thank you very much !!!”

Wolfgang Hoppe, DE (Sunday, third of August 2014)

"I got my Explorer Pro 50. A very noble piece. It exactly corresponds with my expectation of an exclusive chess computer and it works perfect. I'm very pleased."

Pius Küng, CH (Sunday, 23th of March 2014)

 "Today my Explorer Pro 50 arrived. A very admirable chess computer. I'm really satisfied. Would buy it again.“

Achim Weiß, DE (Friday, 14th of February 2014)