Bullet 120+2 (Original UCI)

IJCCRL • Bullet 60s+2s • 2026

II SE BULLET IJCCRL CUP 240326 — Regular Phase

Audited 10-engine fixed mirrored opening round robin regular phase. The event passed audit under IJCCRL material criteria: complete published results, deterministic pairing integrity verified under the mirrored round-robin format actually used, no duplicate games detected, exact colour balance for every engine, and termination plus tablebase evidence recorded in the published event material.

AUDIT PASS Time control: 60s + 2s 360 games 10 engines 72 games per engine

Audit summary

Format10-engine RR
Pair structure8 games per pair
Colour balance36W / 36B each
Publication packPGN + results + scheduler

Verified controls

  • PASSComplete published event pack with final results for the full 360-game regular phase.
  • PASSDeterministic pairing integrity verified under the fixed mirrored opening round-robin format actually used.
  • PASSNo duplicate games detected under D1/D2 fingerprint control.
  • PASSExact round-robin colour balance verified for every engine: 36 White and 36 Black games each.
  • PASSTermination and tablebase evidence recorded in the published event material.
Rank Engine Score Games W-D-L Last 10 Notes
1 Obsidian dev-16.15 45.5/72 72 31-29-12 LWDWWDDLWD Regular-phase leader by half a point.
2 Stockfish 18 45.0/72 72 33-24-15 WDWLDWDWDW Second place, half a point behind the leader.
3 Stormphrax 7.0.0 sse41popcnt 42.5/72 72 23-39-10 WLLWDWDWLD Highest draw volume among the top three.
4 Caissa 1.24 POPCNT 38.0/72 72 23-30-19 LWDWDDDWLD Tied on points for fourth place.
5 Clover 9.1 38.0/72 72 25-26-21 LDLWLDLWWD Level on points with Caissa.
6 Reckless 0.9.0 36.0/72 72 23-26-23 WLWLDLWLDW Even win/loss balance around the middle of the table.
7 Berserk 13 34.5/72 72 19-31-22 WDDLWLWLWD Solid draw count across the audited field.
8 PlentyChess 7.0.1 33.0/72 72 16-34-22 LDWDDDDLDL High-draw profile in the full mirrored schedule.
9 RubiChess 20240817 (popcnt) 24.0/72 72 11-26-35 WLDLDLLWLD Complete audited sample with exact colour balance.
10 Integral v7.0.0 23.5/72 72 9-29-34 LWLDLWDLDL Regular phase completed under the same mirrored RR conditions.
Download the published event pack and games from the official IJCCRL downloads section: jccrl.eu/downloads/.

This block is ready to publish as the regular-phase audit summary + final standings for II SE BULLET IJCCRL CUP 240326. The audited round robin closed at 360/360 games, with 36 White and 36 Black games per engine and the final table led by Obsidian dev-16.15 on 45.5/72.
IJCCRL • II SE Bullet • 60s+2s • 2026

II SE Bullet IJCCRL Cup 240326 — Top 8 Qualified Engines

The first eight engines from the audited regular phase advance to the knockout stage. Pairings are seeded in standard order: #1 vs #8, #2 vs #7, #3 vs #6 and #4 vs #5. For clarity and consistency, these matches will be executed in AVX2.

Top 8 Qualified Regular phase audited 72 games per engine Bullet 60s + 2s Knockout: AVX2 Match 1 completed
Audit PASS Round of 16 — Match 1
PlentyChess 7.0.55 defeats Obsidian 16.0 by 22.5–17.5
The first knockout match has been completed and audited successfully under the fixed mirrored opening duel criterion. The published PGN is complete, no unfinished games were detected, side balance is exact at 20 White / 20 Black for each engine, and the mirrored opening-set integrity was verified throughout the match.

Pairing 1

Completed • Audited PASS
#1
Obsidian dev-16.15
45.5 / 72 points
31-29-12
Knockout result: 17.5 / 40
vs
#8
PlentyChess 7.0.1
33.0 / 72 points
16-34-22
Knockout result: 22.5 / 40
Qualified to quarterfinal continuation

Pairing 2

#2
Stockfish 18
45.0 / 72 points
33-24-15
vs
#7
Berserk 13
34.5 / 72 points
19-31-22

Pairing 3

#3
Stormphrax 7.0.0 sse41popcnt
42.5 / 72 points
23-39-10
vs
#6
Reckless 0.9.0
36.0 / 72 points
23-26-23

Pairing 4

#4
Caissa 1.24 POPCNT
38.0 / 72 points
23-30-19
vs
#5
Clover 9.1
38.0 / 72 points
25-26-21
#1 Qualified

Obsidian dev-16.15

45.5 / 72 points in the regular phase

Record31-29-12
Games72
Seed1
#2 Qualified

Stockfish 18

45.0 / 72 points in the regular phase

Record33-24-15
Games72
Seed2
#3 Qualified

Stormphrax 7.0.0 sse41popcnt

42.5 / 72 points in the regular phase

Record23-39-10
Games72
Seed3
#4 Qualified

Caissa 1.24 POPCNT

38.0 / 72 points in the regular phase

Record23-30-19
Games72
Seed4
#5 Qualified

Clover 9.1

38.0 / 72 points in the regular phase

Record25-26-21
Games72
Seed5
#6 Qualified

Reckless 0.9.0

36.0 / 72 points in the regular phase

Record23-26-23
Games72
Seed6
#7 Qualified

Berserk 13

34.5 / 72 points in the regular phase

Record19-31-22
Games72
Seed7
#8 Qualified

PlentyChess 7.0.1

33.0 / 72 points in the regular phase

Record16-34-22
Games72
Seed8
Qualified from the final audited regular-phase standings of II SE Bullet IJCCRL Cup 240326. The Top 8 order is: Obsidian dev-16.15, Stockfish 18, Stormphrax 7.0.0 sse41popcnt, Caissa 1.24 POPCNT, Clover 9.1, Reckless 0.9.0, Berserk 13 and PlentyChess 7.0.1.

The first knockout pairing has now been completed and audited: PlentyChess defeated Obsidian by 22.5–17.5. The match passed the forensic audit under the fixed mirrored opening criterion, including complete PGN publication, exact side balance, duplicate-game control and recorded termination / TB evidence.

The remaining knockout pairings stay fixed as #2 vs #7, #3 vs #6 and #4 vs #5. The elimination stage continues in AVX2 configuration.