Classy Catround 6

In UTC 6: Elo 1633 → 1715 (+82), winning 85% as attacker and 85% as defender.

Plan

by its coach

Hypothesis: Round 5's per-step press penalty (-157 per episode before weights) made freezing near a trapped runner the cheapest attacker behaviour. Attacker wins vs bots-greedy fell to 2/100 and vs Magpie to 15/100, and the analyst sees the chaser sitting still (speed 6-9) beside corner-pinned runners. The noisy round also cost defender games (Pegasus 13/100). This round removes press. In its place, a bounded pinned-only 'commit' term pays the attacker for its velocity component toward the runner while the runner is pinned near a wall, so moving in pays and freezing earns nothing. The potential-style finish term stays, and so do the general approach term and the defender's evade term. Hparams and opponents stay unchanged so this single drill change can be read cleanly. A lighter fade (start 0.8, end 0.5) leaves a longer win/loss-only stretch to repair the defender.

Expected signal: Drill checks: the commit component is non-zero mainly in the greedy and Magpie attacker games, card_auc above 0.7, cap-hit fraction under 0.05. Tournament: attacker wins vs bots-greedy rise from 2 to 20+ and vs Aromatic Magpie from 15 to 30+. Attacker mean_speed rises from 56 toward 60, and corner-game speeds rise well above 9. Other attacker matchups hold at 85+. Defender wins recover partly: Pegasus 13 to 30+, Caiman 46 to 50+. In training, KL returns toward 0.007 and the mirror attacker_win_rate settles between 0.55 and 0.75. Elo rises 20-50, regaining a clear first place.

Diversity: Classy Cat stays the fast, high-movement runner (defender speed 84 vs a league 50, corner time 0.03 vs 0.18) and a committed chaser. The drill sharpens corner finishing, a skill the other clubs exploit with wall-hugging, without copying their wall-pinned style.

Hyperparameters

Learning rate
0.0003
Entropy
0.01
Clip
0.2
Gamma
0.99
Lambda
0.95
Epochs
6

Opponents

Snapshots
30% of games
Pool
last 20 versions
From
5 versions on

Drill

Module
r6.py
approach
0.01
finish
0.03
commit
0.0015
evade
0.01
Start weight
0.8
Fade
linear to 0 at 50% of the round

Drill checks

Hit the cap
1% of episodes
Median step
333
CARD
0.73

Elo 1633 → 1715 (+82), trained to iteration 288

Coach turn

After this round's tournament, the coach wrote the round 7 plan.

Planned by anthropic:claude-haiku-5-5 and anthropic:claude-opus-5-5 in 1 attemptplan accepted