Commit b5cde5cd authored by Oleg Smirnov's avatar Oleg Smirnov

v2.1 release

parent 1955b895
......@@ -7,10 +7,14 @@ Zevra 2 is free and open-source UCI chess engine.
+ `make all` - creating a version optimized for your CPU (will not work on other PCs)
+ `make popcnt` - creating a universal assembly with support for POPCNT instructions
+ `make nonpopcnt` - creating a universal assembly without the support of the POPCNT instruction
+ `make release` - creatinga universal assembly with POPCNT and without POPCNT instruction
+ `make release` - creating a universal assembly with POPCNT and without POPCNT instruction
## Strength of the game
### Zevra v2.1 r210
Last version of Zevra v2.1 r210 about 50 Elo stronger than Zevra v2.0 r172
### Zevra v2.0 r172
[CCRL 40/4](http://www.computerchess.org.uk/ccrl/404/cgi/engine_details.cgi?print=Details&each_game=1&eng=Zevra%202.0%20r172%2064-bit#Zevra_2_0_r172_64-bit): 2408 elo points
......@@ -25,6 +29,11 @@ tc: 10s+0.1s
Hash: 16mb
```
#### 14.11.2018
```
Score of Zevra v2.1 r210 vs Zevra v2.0 r172: 749 - 466 - 785 [0.571] 2000
Elo difference: 49.49 +/- 11.90
```
#### 12.11.2018
```
Score of Zevra v2.1 r193 dev vs Zevra v2.0 r172: 767 - 491 - 742 [0.569] 2000
......@@ -36,7 +45,7 @@ Score of Zevra v2.1 r183 dev vs Zevra v2.0 r172: 355 - 254 - 391 [0.550] 1000
Elo difference: 35.21 +/- 16.82
```
![Regression graph](https://s8.hostingkartinok.com/uploads/images/2018/11/137707b2216cb5e8758dabbfdce20b69.png)
![Regression graph](https://s8.hostingkartinok.com/uploads/images/2018/11/709815ef6225479350f327ce75817c05.png)
## Project inspired
+ Chess programming wiki: https://www.chessprogramming.org/Main_Page
......
No preview for this file type
Changes:
+ Do not make reverse futility pruning and razoring if we have pawn on 7th rank
Test results:
Regression test:
--------------------------------------------------------------
tc: 3s+0.02s
tc: 10s+0.1s
Hash: 16mb
Score: 709 - 594 - 667 [0.529] 1970
Elo difference: 20.30 +/- 12.48
SPRT[0, 5]: llr 2.2, lbound -2.2, ubound 2.2 - H1 was accepted
Score of Zevra v2.1 r210 vs Zevra v2.0 r172: 749 - 466 - 785 [0.571] 2000
Elo difference: 49.49 +/- 11.90
--------------------------------------------------------------
\ No newline at end of file
......@@ -156,7 +156,7 @@ int main() {
}
void printEngineInfo() {
printf("id name Zevra v2.1 r210 dev\nid author Oleg Smirnov\n");
printf("id name Zevra v2.1 r210\nid author Oleg Smirnov\n");
}
void readyok() {
......
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