50 fresh seeds (disjoint from every earlier batch), same goal, 200 steps. Each engine runs the brain it defaults to, so this compares engine+brain pairs, not friction alone; the friction-only comparison (same brain both sides) is the 25-seed contact study.
| metric | REF | WALL |
|---|---|---|
| solved | 5 | 6 |
| cov_ge_95 | 5 | 6 |
| cov_mean | 0.591 | 0.584 |
| cov_median | 0.719 | 0.623 |
| cov_q25 | 0.351 | 0.356 |
| cov_q75 | 0.895 | 0.837 |
| angle_final_mean | 19.7 | 18.8 |
| pos_final_mean | 24.6 | 20.9 |
| bouts_mean | 3.6 | 3.7 |
| plans_mean | 4.3 | 4.3 |
| peak_speed_mean | 114 | 114 |




| seed | REF · pymunk-reference, rule brainpublished frictionless env, its default brain | WALL · pymunk-wall μ=0.5, Brain-contact2contact_friction 0.5, its default brain |
|---|---|---|
| 2772mixed, moderate | not solved · cov 0.917 · 1° / 4 px · 5 bouts | not solved · cov 0.594 · 6° / 18 px · 4 bouts |
| 3075mixed, moderate | not solved · cov 0.914 · 4° / 0 px · 6 bouts | SOLVED @191 · cov 0.963 · 1° / 2 px · 5 bouts |
| 4183flipped, far, near a wall | not solved · cov 0.556 · 0° / 20 px · 3 bouts | not solved · cov 0.360 · 0° / 38 px · 3 bouts |
| 5739flipped, far, near a wall | not solved · cov 0.047 · 61° / 72 px · 2 bouts | not solved · cov 0.312 · 6° / 45 px · 3 bouts |
| 7082flipped, far, near a wall | not solved · cov 0.797 · 4° / 9 px · 3 bouts | not solved · cov 0.856 · 4° / 7 px · 3 bouts |
| 7895flipped, far, near a wall | not solved · cov 0.000 · 67° / 103 px · 2 bouts | not solved · cov 0.394 · 9° / 38 px · 4 bouts |
| 10560mixed, far | SOLVED @189 · cov 0.955 · 2° / 1 px · 4 bouts | not solved · cov 0.358 · 6° / 40 px · 4 bouts |
| 12718flipped, far | not solved · cov 0.918 · 4° / 0 px · 4 bouts | not solved · cov 0.714 · 0° / 14 px · 3 bouts |
| 16110flipped, moderate | not solved · cov 0.398 · 43° / 4 px · 4 bouts | not solved · cov 0.304 · 70° / 12 px · 4 bouts |
| 17359inverted, far | not solved · cov 0.357 · 50° / 14 px · 4 bouts | not solved · cov 0.344 · 52° / 1 px · 5 bouts |
| 17866mixed, near | not solved · cov 0.806 · 5° / 8 px · 4 bouts | not solved · cov 0.826 · 9° / 1 px · 4 bouts |
| 22402mixed, near | SOLVED @176 · cov 0.978 · 1° / 1 px · 5 bouts | not solved · cov 0.676 · 3° / 15 px · 6 bouts |
| 24422flipped, moderate | not solved · cov 0.743 · 12° / 8 px · 3 bouts | not solved · cov 0.678 · 5° / 15 px · 3 bouts |
| 25236aligned, far, near a wall | not solved · cov 0.219 · 4° / 39 px · 4 bouts | not solved · cov 0.559 · 24° / 14 px · 3 bouts |
| 26352flipped, far | not solved · cov 0.000 · 9° / 109 px · 3 bouts | not solved · cov 0.179 · 16° / 78 px · 4 bouts |
| 27368flipped, far, near a wall | not solved · cov 0.761 · 13° / 9 px · 4 bouts | not solved · cov 0.102 · 15° / 79 px · 4 bouts |
| 30596mixed, far | not solved · cov 0.916 · 1° / 4 px · 3 bouts | not solved · cov 0.326 · 5° / 34 px · 3 bouts |
| 31034inverted, moderate | not solved · cov 0.287 · 84° / 4 px · 4 bouts | not solved · cov 0.286 · 87° / 14 px · 5 bouts |
| 32316flipped, moderate | not solved · cov 0.388 · 40° / 19 px · 3 bouts | not solved · cov 0.508 · 33° / 14 px · 4 bouts |
| 33340mixed, far | not solved · cov 0.369 · 1° / 37 px · 4 bouts | SOLVED @143 · cov 0.963 · 2° / 1 px · 4 bouts |
| 33877mixed, far, near a wall | not solved · cov 0.000 · 54° / 112 px · 3 bouts | not solved · cov 0.394 · 2° / 29 px · 3 bouts |
| 33915flipped, far | not solved · cov 0.794 · 3° / 10 px · 4 bouts | not solved · cov 0.752 · 3° / 12 px · 4 bouts |
| 41631mixed, far, near a wall | not solved · cov 0.000 · 46° / 141 px · 5 bouts | not solved · cov 0.104 · 60° / 63 px · 5 bouts |
| 43366mixed, far | not solved · cov 0.430 · 4° / 26 px · 3 bouts | not solved · cov 0.847 · 4° / 5 px · 3 bouts |
| 45081aligned, far, near a wall | not solved · cov 0.344 · 2° / 41 px · 4 bouts | SOLVED @160 · cov 0.981 · 0° / 1 px · 3 bouts |
| 46242aligned, far, near a wall | not solved · cov 0.446 · 3° / 26 px · 3 bouts | not solved · cov 0.805 · 8° / 5 px · 3 bouts |
| 47879mixed, far | not solved · cov 0.778 · 3° / 9 px · 4 bouts | not solved · cov 0.942 · 2° / 3 px · 4 bouts |
| 49699mixed, far | not solved · cov 0.922 · 2° / 3 px · 3 bouts | not solved · cov 0.917 · 1° / 4 px · 3 bouts |
| 50423flipped, far | not solved · cov 0.752 · 0° / 13 px · 4 bouts | not solved · cov 0.677 · 19° / 6 px · 4 bouts |
| 54619mixed, far | not solved · cov 0.735 · 0° / 13 px · 3 bouts | not solved · cov 0.364 · 3° / 40 px · 3 bouts |
| 56524mixed, far, near a wall | not solved · cov 0.545 · 3° / 20 px · 4 bouts | not solved · cov 0.603 · 11° / 18 px · 3 bouts |
| 60162mixed, far | not solved · cov 0.741 · 8° / 13 px · 3 bouts | not solved · cov 0.678 · 4° / 16 px · 4 bouts |
| 65954flipped, far | not solved · cov 0.379 · 27° / 35 px · 2 bouts | not solved · cov 0.411 · 28° / 33 px · 2 bouts |
| 67306mixed, far | not solved · cov 0.948 · 2° / 0 px · 7 bouts | SOLVED @189 · cov 0.960 · 1° / 2 px · 4 bouts |
| 69745flipped, far | not solved · cov 0.899 · 1° / 4 px · 3 bouts | not solved · cov 0.872 · 3° / 6 px · 3 bouts |
| 72262flipped, moderate | not solved · cov 0.327 · 72° / 19 px · 3 bouts | not solved · cov 0.329 · 61° / 11 px · 4 bouts |
| 73417flipped, far, near a wall | not solved · cov 0.762 · 3° / 12 px · 3 bouts | not solved · cov 0.840 · 5° / 6 px · 4 bouts |
| 73939aligned, moderate | SOLVED @167 · cov 0.982 · 1° / 0 px · 4 bouts | not solved · cov 0.323 · 3° / 41 px · 3 bouts |
| 77071mixed, far, near a wall | not solved · cov 0.798 · 4° / 9 px · 4 bouts | not solved · cov 0.911 · 4° / 3 px · 3 bouts |
| 77887inverted, moderate | not solved · cov 0.339 · 62° / 15 px · 3 bouts | not solved · cov 0.374 · 49° / 9 px · 4 bouts |
| 79889flipped, far | not solved · cov 0.881 · 0° / 6 px · 3 bouts | not solved · cov 0.375 · 3° / 34 px · 3 bouts |
| 81221aligned, far | not solved · cov 0.704 · 5° / 14 px · 4 bouts | not solved · cov 0.700 · 3° / 14 px · 4 bouts |
| 83249inverted, moderate | not solved · cov 0.349 · 51° / 20 px · 4 bouts | not solved · cov 0.355 · 56° / 17 px · 4 bouts |
| 91328flipped, far, near a wall | not solved · cov 0.674 · 2° / 16 px · 4 bouts | SOLVED @181 · cov 0.952 · 2° / 1 px · 4 bouts |
| 92348flipped, far, near a wall | not solved · cov 0.000 · 134° / 165 px · 2 bouts | not solved · cov 0.000 · 159° / 133 px · 5 bouts |
| 93128mixed, far | SOLVED @108 · cov 0.978 · 1° / 1 px · 2 bouts | not solved · cov 0.803 · 3° / 10 px · 4 bouts |
| 94828inverted, moderate | not solved · cov 0.300 · 69° / 1 px · 4 bouts | not solved · cov 0.291 · 79° / 13 px · 4 bouts |
| 95399mixed, far | not solved · cov 0.925 · 4° / 0 px · 5 bouts | SOLVED @168 · cov 0.954 · 2° / 2 px · 4 bouts |
| 97593aligned, far | SOLVED @189 · cov 0.955 · 1° / 2 px · 4 bouts | not solved · cov 0.644 · 4° / 17 px · 4 bouts |
| 99183mixed, far | not solved · cov 0.562 · 13° / 17 px · 3 bouts | not solved · cov 0.737 · 2° / 11 px · 3 bouts |