Author - Jakob256
Version 19:
Score against Version 18: 64% (+100 Elo)
moveordering refactored and considers "defended by a pawn" for own pieces
if depth2go>=4 and no hashmove is available, a shallow search is used to find the most promising move
beta-pruning at depth2go=1,2,3 with margins 0cp, 250cp and 500cp
4 captures extend the search by 2 ply
repetition detection: if a position occures twice in the search tree, it is evaluated as drawn
Purple Panda 18 vs other engines:
| Eveann 1.73 | 0.5/10 | -9 | 10 Games |
| Seawall 20240926 | 0/10 | -10 | 10 Games |
| Amelia 0.12 | 3.5/8 | -1 | 8 Games |
| Yakka 1.1 | 0/8 | -8 | 8 Games |
| Dirty | 0/8 | -8 | 8 Games |
| Sapling 1.1.1 | 0/8 | -8 | 8 Games |
| Neuromancer 1.5 | 3/6 | +0 | 6 Games |
| Kairuku 1.0.1 JA | 2/3 | +1 | 3 Games |
| Alpaca 0.2.6 | 1/3 | -1 | 3 Games |
| Eveann 2.1 | 0/3 | -3 | 3 Games |
| Lozza 3 Dev.874772a JA | 0/3 | -3 | 3 Games |
| Perseus 0.9-alpha | 0/3 | -3 | 3 Games |
| Amelia 0.15 | 2/2 | +2 | 2 Games |
| Brogle 0.1.0 | 2/2 | +2 | 2 Games |
| Freda 1.0 | 0.5/2 | -1 | 2 Games |
| Cwtch 1 | 0/2 | -2 | 2 Games |
| Chess4j 6.0 JA | 0/2 | -2 | 2 Games |
| Cyrano 0.6b17 JA | 0/2 | -2 | 2 Games |
| Donut dev.38ee0c6 JA | 0/2 | -2 | 2 Games |
| Tcheran 4.0 | 0/2 | -2 | 2 Games |
| Astra 3.4 | 0/2 | -2 | 2 Games |
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