Chiron 4 released

Chiron 4 is about 70 points stronger than Chiron 3.

Here’s a list of the main changes:
– improved automatic tuning of the evaluation
– improved evaluation of passed pawns, mobility, opposite bishops endings
– improved forward pruning in the search
– improved LazySMP for parallel search
– support for Windows Processor Groups (more than 64 threads can now be used)
– NUMA optimization (new UCI and Winboard options “NUMA”)
– minor speed optimizations
– fixed a pondering bug
– fixed two time management bugs under the Winboard protocol

Chiron 4 is available for Windows and Android.
Buyers of the Windows version will also receive a code to get the Android one for free.

Chiron 2/3 Customers can buy Chiron 4 with a discount through the link they have reiceved. Whoever has bought Chiron 3 in the last month will receive Chiron 4 for free.