---

Copyright ©

Zeus 1.25
- old pawn endings evaluation bug fixed
- greatly increased unstoppable pawns value
- king safety evaluation changed

Zeus 1.24
- see routines rewrited
- add bad pieces evaluation
- small evaluation changes

Zeus 1.23
- add more evaluation knowledge
- big changes in evaluation function

Zeus 1.22
- killer heuristic old bug fixed
- pawn endgame extension bug fixed
- best move storing logic changed

Zeus 1.21
- again passed pawn evualation changes
- check extension tuning
- singular extension bug fixed
- aspiration window bug fixed
- killer heurstic bug fixed
- add some extensions

Zeus 1.20
- passed pawn evualation changes
- passed pawn evaluation some bugs fixed

Zeus 1.19
- fixed bug(appeared in 1.18 version), when engine didn't move if position has checkmate in one
- add check extension
- forbbiden quite check generation at big depth in quies 

Zeus 1.18
- some hash tuning
- some null move tuning

Zeus 1.17
- fixed wrong depth stored hash bug
- fixed many asymetric evaluation bugs

Zeus 1.16
- add aspiration windows, futility pruning, extended futility pruning
- fixed bug, which can cause engine make not best move
- minor evaluation changes

Zeus 1.15
- minor chnges in history euristic
- add some endgame knowledge
- passed pawn evaluation some bugs fixed
- possible hang bug fixed, in positions where more then three rooks or three queens attack enemy piece

Zeus 1.14
- more smooth game phase evaluation
- time problem fixed with tournament time control and Nunn positions 
- some see changes

Zeus 1.13
- passed pawns evaluation changes
- more efficiency singular extension using 
- more efficiency hash using
- some bad trade evaluation changes

Zeus 1.12
- three move repetition don't checking bug(appeared in 1.11 version) fixed
- minor bad trade evaluation changes
- wrong pined piece definition bug fixed

Zeus 1.11
- few more bugs with writing array out of bounds fixed
- very rare bug when in some situations don't allowed checks in quiesce fixed
- illegal e.p move bug fixed
- add pined pieces evaluation

 Zeus 1.10
- new opening book
- support Winboard bk command
- add Book and MinOpenProc parameters to .ini
- possible crash fixed, when promotion becomes a killer
- add bad trade evaluation
- null heuristik changes
- better perpetual check discovering