Naum is a chess engine supporting both Winboard and UCI protocols.
It has been under continuous development since 2003 and at the moment is one of the top 3 chess engines in the world.

Before contacting the customer support at naum_chess@yahoo.com please refer to the following FAQ

Naum 3.1 has been released on Apr, 27th !
(If you purchased Naum 3 and didn't receive your free update please email the customer support)

If you want to purchase Naum 3.1 the prices are as follows:

• Single processor version
• Customers who purchased Naum 2.2: 22 EUR
• New customers: 30 EUR

• Multiple processor version
• Customers who purchased Naum 2.2: 45 EUR
• New customers: 60 EUR

• New customers:
  purchase Naum 3.1 MP (multiple processor version)
  or
  purchase Naum 3.1 SP (single processor version)

• Customers who purchased Naum 2.2:
  upgrade to Naum 3.1 MP (multiple processor version)
  or
  upgrade to Naum 3.1 SP (single processor version)

Get a free Palm PDA version of Naum here