Mayhem 8.4

• Some fixes
• Some speedups
• +3 Elo

Install: make all strip install clean

Bench: 247216819

Tests

Finished game 2234 (Mayhem 8.3 vs Mayhem 8.4): * {No result}
Score of Mayhem 8.4 vs Mayhem 8.3: 737 - 712 - 784  [0.506] 2233
...      Mayhem 8.4 playing White: 360 - 368 - 389  [0.496] 1117
...      Mayhem 8.4 playing Black: 377 - 344 - 395  [0.515] 1116
...      White vs Black: 704 - 745 - 784  [0.491] 2233
Elo difference: 3.9 +/- 11.6, LOS: 74.4 %, DrawRatio: 35.1 %
SPRT: llr 0 (0.0%), lbound -inf, ubound inf

Player: Mayhem 8.4
   "Draw by 3-fold repetition": 491
   "Draw by insufficient mating material": 270
   "Draw by stalemate": 23
   "Loss: Black mates": 368
   "Loss: White mates": 344
   "No result": 1
   "Win: Black mates": 377
   "Win: White mates": 360
Player: Mayhem 8.3
   "Draw by 3-fold repetition": 491
   "Draw by insufficient mating material": 270
   "Draw by stalemate": 23
   "Loss: Black mates": 377
   "Loss: White mates": 360
   "No result": 1
   "Win: Black mates": 368
   "Win: White mates": 344
Finished match

Mayhem 8.3

• An Array out of bound bug fixed
• Plus some cleanups. Macros eliminated
• No functional changes

Install: make all strip install clean

Bench: 241185678

Mayhem 8.2

Slightly improved Mayhem.
Install Mayhem: make all strip install clean
Bench: 241185678

Score of Mayhem 8.2 vs Mayhem 8.1: 2065 - 1992 - 943  [0.507] 5000
...      Mayhem 8.2 playing White: 1066 - 986 - 448  [0.516] 2500
...      Mayhem 8.2 playing Black: 999 - 1006 - 495  [0.499] 2500
...      White vs Black: 2072 - 1985 - 943  [0.509] 5000
Elo difference: 5.1 +/- 8.7, LOS: 87.4 %, DrawRatio: 18.9 %
SPRT: llr 0 (0.0%), lbound -inf, ubound inf

Player: Mayhem 8.2
   "Draw by 3-fold repetition": 640
   "Draw by adjudication": 9
   "Draw by fifty moves rule": 11
   "Draw by insufficient mating material": 275
   "Draw by stalemate": 8
   "Loss: Black mates": 98
   "Loss: Black wins by adjudication": 888
   "Loss: White mates": 120
   "Loss: White wins by adjudication": 886
   "Win: Black mates": 102
   "Win: Black wins by adjudication": 897
   "Win: White mates": 119
   "Win: White wins by adjudication": 947
Player: Mayhem 8.1
   "Draw by 3-fold repetition": 640
   "Draw by adjudication": 9
   "Draw by fifty moves rule": 11
   "Draw by insufficient mating material": 275
   "Draw by stalemate": 8
   "Loss: Black mates": 102
   "Loss: Black wins by adjudication": 897
   "Loss: White mates": 119
   "Loss: White wins by adjudication": 947
   "Win: Black mates": 98
   "Win: Black wins by adjudication": 888
   "Win: White mates": 120
   "Win: White wins by adjudication": 886
Finished match

Mayhem 8.1

• Some fixes + simplifications + ( MayhemDuck 2.3 + 2.4 )
  Bench: 30730723

Score of Mayhem 8.1 vs Mayhem 8.0: 690 - 687 - 479  [0.501] 1856
Started game 1857 of 1000000 (Mayhem 8.1 vs Mayhem 8.0)
Terminating process of engine Mayhem 8.0(1)
Terminating process of engine Mayhem 8.1(0)

Finished game 1857 (Mayhem 8.1 vs Mayhem 8.0): * {No result}
Score of Mayhem 8.1 vs Mayhem 8.0: 690 - 687 - 479  [0.501] 1856
...      Mayhem 8.1 playing White: 331 - 353 - 244  [0.488] 928
...      Mayhem 8.1 playing Black: 359 - 334 - 235  [0.513] 928
...      White vs Black: 665 - 712 - 479  [0.487] 1856
Elo difference: 0.6 +/- 13.6, LOS: 53.2 %, DrawRatio: 25.8 %
Finished match

Mayhem 8.0

Just a little fix. No improvements over v7.9
bench: 30730735

MayhemDuck-2.2 is Mayhem for duck chess variant.

Mayhem 7.9

• A few fixes for variants ( pawns on 1 / 8 ranks )
• cast clutter cleaned out
• Fixed MayhemDuck 1.8. Now it works properly

bench: 30730735

Mayhem 7.8

• Some cleanups
• Support for theban + other variants
• Modest Elo gain +5 Elo
• Classic version can now be compiled w/ -DCLASSIC
• MayhemDuck 1.6. Some fixes for buggy GUIs

bench: 30730735

Mayhem 7.7

• Strongest Mayhem yet
• Bug fixes. 1 critical bug fixed !
• Various speedups / simplifications
• +10 Elo vs v7.6

Signatures

• perft: 119060324
• bench: 16021954

MayhemDuck 1.5

MayhemDuck 1.5 also released.
The strongest Linux DuckChess engine atm.
MayhemDuck is a Mayhem clone which play only DuckChess variant.

Test: 1s FRC

Score of Mayhem 7.7 vs Mayhem 7.6: 618 - 577 - 334  [0.513] 1529
...      Mayhem 7.7 playing White: 305 - 282 - 178  [0.515] 765
...      Mayhem 7.7 playing Black: 313 - 295 - 156  [0.512] 764
...      White vs Black: 600 - 595 - 334  [0.502] 1529
Elo difference: 9.3 +/- 15.4, LOS: 88.2 %, DrawRatio: 21.8 %
Finished match

Test: 1s STD

Score of Mayhem 7.7 vs Fruit 2.1: 1175 - 10 - 14  [0.986] 1199
...      Mayhem 7.7 playing White: 586 - 5 - 9  [0.984] 600
...      Mayhem 7.7 playing Black: 589 - 5 - 5  [0.987] 599
...      White vs Black: 591 - 594 - 14  [0.499] 1199
Elo difference: 736.9 +/- 78.7, LOS: 100.0 %, DrawRatio: 1.2 %
Finished match

Mayhem 7.6

• C++20 support
• Cleanups / speedups

Signatures

bench: 16032936
perft: 119060324

Tests

7.5:
Nodes:    573255725
Time(ms): 150009
NPS:      3821475
Mode:     NNUE

7.6:
Nodes:    573539190
Time(ms): 150007
NPS:      3823416
Mode:     NNUE

FRC tests

Score of Mayhem 7.6 vs Mayhem 7.5: 2089 - 2064 - 1272  [0.502] 5425
...      Mayhem 7.6 playing White: 1065 - 1012 - 636  [0.510] 2713
...      Mayhem 7.6 playing Black: 1024 - 1052 - 636  [0.495] 2712
...      White vs Black: 2117 - 2036 - 1272  [0.507] 5425
Elo difference: 1.6 +/- 8.1, LOS: 65.1 %, DrawRatio: 23.4 %
Finished match

Mayhem 7.5

• Improved HCE
• Bug fixes
• +15 Elo

Signatures

bench: 16032936
perft: 119060324

FRC tests

// HCE

Score of Mayhem 7.5 vs Mayhem 7.4: 397 - 342 - 261  [0.527] 1000
...      Mayhem 7.5 playing White: 201 - 171 - 128  [0.530] 500
...      Mayhem 7.5 playing Black: 196 - 171 - 133  [0.525] 500
...      White vs Black: 372 - 367 - 261  [0.502] 1000
Elo difference: 19.1 +/- 18.5, LOS: 97.8 %, DrawRatio: 26.1 %
Finished match

Score of Mayhem 7.5 vs Mayhem 7.4: 410 - 382 - 208  [0.514] 1000
...      Mayhem 7.5 playing White: 212 - 192 - 96  [0.520] 500
...      Mayhem 7.5 playing Black: 198 - 190 - 112  [0.508] 500
...      White vs Black: 402 - 390 - 208  [0.506] 1000
Elo difference: 9.7 +/- 19.2, LOS: 84.0 %, DrawRatio: 20.8 %
Finished match

// NNUE

Score of Mayhem 7.5 vs Mayhem 7.4: 414 - 335 - 251  [0.539] 1000
...      Mayhem 7.5 playing White: 198 - 179 - 123  [0.519] 500
...      Mayhem 7.5 playing Black: 216 - 156 - 128  [0.560] 500
...      White vs Black: 354 - 395 - 251  [0.479] 1000
Elo difference: 27.5 +/- 18.7, LOS: 99.8 %, DrawRatio: 25.1 %
Finished match

Score of Mayhem 7.5 vs Mayhem 7.4: 390 - 302 - 308  [0.544] 1000
...      Mayhem 7.5 playing White: 182 - 192 - 126  [0.490] 500
...      Mayhem 7.5 playing Black: 208 - 110 - 182  [0.598] 500
...      White vs Black: 292 - 400 - 308  [0.446] 1000
Elo difference: 30.7 +/- 17.9, LOS: 100.0 %, DrawRatio: 30.8 %
Finished match