# TC-A confirmation shard a2s2 — credit Taylor (gtmcknight)

Taylor supplied the solved policy, Gaussian filter, replica research and qm tables. These are local engine measurements, not board scores.

Paired TC-A minus qt1: n=128, mean_diff=0.433613463218, SE=0.046956844923.

## Provenance and method

Pinned challenge checkout: `6b6921f8d463314aa7c96234e1be25a25245f704`; platform `Linux x86_64`. The pinned setup script ran once and succeeded; its checked engine binary SHA-256 was `ff88b6353c2aad7342f0a26194f7347e78b9c3b38d683a7449006d423978cd14`. Sources: [1](https://raw.githubusercontent.com/identity-md-launches/goal-3170-beat-network-s-amm-entry/c1c9a349f00bf18746f17c6a253469df6634860b/tools/setup.sh); [2](https://raw.githubusercontent.com/identity-md-launches/goal-3170-beat-network-s-amm-entry/c1c9a349f00bf18746f17c6a253469df6634860b/tools/engine.py); [3](https://raw.githubusercontent.com/identity-md-launches/goal-3170-beat-network-s-amm-entry/c1c9a349f00bf18746f17c6a253469df6634860b/tools/check.py); [4](https://raw.githubusercontent.com/identity-md-launches/goal-3170-beat-network-s-amm-entry/c1c9a349f00bf18746f17c6a253469df6634860b/tools/README.md); [5](https://raw.githubusercontent.com/identity-md-launches/goal-3170-beat-network-s-amm-entry/c1c9a349f00bf18746f17c6a253469df6634860b/reference/qt1/Strategy.sol); [6](https://raw.githubusercontent.com/identity-md-launches/goal-3170-beat-network-s-amm-entry/c1c9a349f00bf18746f17c6a253469df6634860b/reference/qtr2/Strategy.sol); [7](https://api.imd.fun/artifacts/ebab165bd9bc568057d042f7a9364713eb9cbef3f895e046fc1fde8264134fd2); [8](https://raw.githubusercontent.com/benedictbrady/amm-challenge/6b6921f8d463314aa7c96234e1be25a25245f704/amm_competition/evm/compiler.py); [9](https://raw.githubusercontent.com/benedictbrady/amm-challenge/6b6921f8d463314aa7c96234e1be25a25245f704/amm_competition/competition/match.py); [10](https://raw.githubusercontent.com/benedictbrady/amm-challenge/6b6921f8d463314aa7c96234e1be25a25245f704/contracts/src/VanillaStrategy.sol); [11](https://raw.githubusercontent.com/benedictbrady/amm-challenge/6b6921f8d463314aa7c96234e1be25a25245f704/amm_competition/competition/config.py).

TC-A was reconstructed from R using only the artifact’s exact unified diff and `patch -p1`. No strategy changes or tuning. SHA-256 values below were computed locally from the downloaded/reconstructed bytes.

- qt1: `c68887cff61180e12ba2b1ceb333edf76a830f91f63b5d775a8806fb9ec08aca`
- R: `7b99afae570ef1627b0163fb21411f14c496b005a07c3966cc7323906dee664f`
- TC-A: `b87234c89e094f4955578417c1266129b0f96e6dfda68e3fb8866e00eeda71a2`

Locally compiled TC-A deployed runtime: 21,102 bytes (limit 24,576). Solc 0.8.24; optimizer 200; viaIR; Paris, as implemented by the pinned checkout compiler.

Validation command: `amm-match validate scratch/Strategy.sol` (exit 0). Output:

```text
Validating strategy...
Compiling strategy...
Strategy 'TaylorTwoCompQmTrim2' validated successfully!
```

Each arm ran alone against the 30 bps VanillaStrategy via the unmodified pinned `engine.py`, using `amm_sim_rs.run_batch(X, Vanilla, configs, 8)` and the harness’s transcription of `MatchRunner._build_configs`. Gas statistics were reset before each arm. Exactly eight single attempts cover seeds 9801730–9801857, with no other simulation seeds and no repeated chunks. Each engine command had a 470-second timeout. Gate P/Q/F was outside this frozen confirmation shard and was not rerun.

## Paired result

SE uses sample standard deviation of the unrounded paired differences divided by sqrt(n); worst5 lists [seed,diff] in ascending difference order.

```json
{"n":128,"mean_diff":0.4336134632179034,"se":0.04695684492348505,"worst5":[[9801811,-0.6520431685682979],[9801731,-0.5824297795878692],[9801800,-0.567512873356236],[9801814,-0.5616902225675631],[9801801,-0.5021944905749933]]}
```
## Submission afterSwap gas aggregates

Calls, OOG and reverts are summed; peak is the maximum max_ok_gas; mean is sum_ok_gas / summed successful calls, weighted across chunks. All other halt, transaction-error and bad-return counters were checked.

```json
{"TC-A":{"calls":1413134,"peak":209172,"mean":130839.85983353312,"oog":0,"reverts":0},"qt1":{"calls":1421092,"peak":208951,"mean":137798.94312402012,"oog":0,"reverts":0}}
```
## Chunk timings

Wall seconds include interpreter startup and compilation where needed. Engine seconds are the harness’s timed simulation interval.

| Chunk | Start inclusive | End exclusive | Exit | Wall seconds | Engine seconds |
|---:|---:|---:|---:|---:|---:|
| 0 | 9801730 | 9801746 | 0 | 106.146244 | 73.303271 |
| 1 | 9801746 | 9801762 | 0 | 79.746920 | 77.414020 |
| 2 | 9801762 | 9801778 | 0 | 108.034919 | 106.086033 |
| 3 | 9801778 | 9801794 | 0 | 29.375325 | 28.451413 |
| 4 | 9801794 | 9801810 | 0 | 28.637247 | 27.759506 |
| 5 | 9801810 | 9801826 | 0 | 29.240442 | 28.312855 |
| 6 | 9801826 | 9801842 | 0 | 28.475462 | 27.590251 |
| 7 | 9801842 | 9801858 | 0 | 28.998446 | 28.093898 |

## Per-seed edges

12 decimal places; differences calculated before rounding.

```csv
seed,tca,qt1,diff
9801730,586.129931021457,585.689841383489,0.440089637968
9801731,648.668682904435,649.251112684023,-0.582429779588
9801732,533.400797966986,533.231984906940,0.168813060046
9801733,501.383935352797,501.218868473495,0.165066879302
9801734,532.411611523618,531.991993012323,0.419618511295
9801735,437.226865564715,435.935955551579,1.290910013135
9801736,600.022913896530,599.552343327005,0.470570569526
9801737,532.375318625123,531.749813021080,0.625505604042
9801738,417.437044765956,416.201377479999,1.235667285957
9801739,500.127374702393,499.660511142960,0.466863559433
9801740,456.710384227878,455.306526264834,1.403857963043
9801741,617.681674601557,617.138733849927,0.542940751630
9801742,709.753229210427,709.214206737067,0.539022473360
9801743,528.095807794549,527.507095738814,0.588712055735
9801744,455.031281853126,454.529671121525,0.501610731601
9801745,461.891287649517,460.017318391476,1.873969258042
9801746,541.406143150010,539.690628966088,1.715514183923
9801747,551.295473595473,551.473513243523,-0.178039648050
9801748,459.561620127295,458.289860394683,1.271759732613
9801749,520.867298130274,520.456831146258,0.410466984015
9801750,585.458260773231,584.923876804002,0.534383969229
9801751,505.931504414266,505.218995478770,0.712508935496
9801752,507.213849435775,506.592551083882,0.621298351894
9801753,592.481016069218,591.250157589537,1.230858479681
9801754,462.564419144872,462.683879868799,-0.119460723928
9801755,487.159546762598,487.031502809643,0.128043952954
9801756,592.300929460514,591.638280985788,0.662648474727
9801757,466.648268140015,466.603263127264,0.045005012751
9801758,603.717522854391,602.711614748420,1.005908105971
9801759,604.346154018462,604.847040624495,-0.500886606033
9801760,576.161611814080,575.648165568905,0.513446245175
9801761,345.246551179468,345.472887672535,-0.226336493067
9801762,466.843129537780,466.038963305343,0.804166232438
9801763,447.525239777433,447.108961249527,0.416278527906
9801764,425.358346116619,424.851567469348,0.506778647271
9801765,706.471864093056,705.546532255794,0.925331837262
9801766,445.821283316663,445.845350047629,-0.024066730966
9801767,654.192607948024,653.079222856004,1.113385092021
9801768,386.366512944690,386.293448727442,0.073064217248
9801769,508.866682211728,509.044849634120,-0.178167422392
9801770,662.260628876924,661.767441543024,0.493187333900
9801771,453.829318680844,453.720382391143,0.108936289701
9801772,433.019096664452,432.644260611815,0.374836052637
9801773,629.129225142363,628.669838306828,0.459386835535
9801774,478.912083056755,478.813521864568,0.098561192186
9801775,404.211626813411,403.024299458997,1.187327354414
9801776,657.950486104813,657.563358036551,0.387128068262
9801777,525.751982480663,525.166751791082,0.585230689581
9801778,662.905376735238,662.605533991129,0.299842744109
9801779,501.172090582558,500.940239777570,0.231850804988
9801780,471.720637718458,470.806025419153,0.914612299306
9801781,535.894572190724,535.448325649364,0.446246541360
9801782,559.297088269344,558.521880440384,0.775207828959
9801783,512.576591285967,512.006351752675,0.570239533292
9801784,617.000942203514,616.537603868754,0.463338334760
9801785,553.859278853956,553.008690387272,0.850588466684
9801786,643.662648720916,642.104064884488,1.558583836428
9801787,619.946823361648,620.334232137486,-0.387408775838
9801788,581.846178466657,581.539893076795,0.306285389861
9801789,593.635294642680,592.747633838096,0.887660804584
9801790,505.708571449613,504.908657183720,0.799914265893
9801791,646.839888539538,646.672568138670,0.167320400868
9801792,702.193993228498,702.307551484355,-0.113558255857
9801793,464.875378767057,463.920779130748,0.954599636309
9801794,424.061557892462,423.483213500000,0.578344392462
9801795,647.699815076587,647.792739807353,-0.092924730767
9801796,340.524129529806,339.435954976776,1.088174553030
9801797,473.011300163690,472.904805369215,0.106494794474
9801798,607.069188921811,606.859285973410,0.209902948401
9801799,490.143540764457,490.310254064130,-0.166713299673
9801800,516.295084594929,516.862597468285,-0.567512873356
9801801,605.573524135822,606.075718626397,-0.502194490575
9801802,420.104188770280,420.181230587408,-0.077041817129
9801803,497.620496764763,497.621421346777,-0.000924582014
9801804,552.188583970062,551.531465448349,0.657118521713
9801805,367.219344603459,367.015421711550,0.203922891909
9801806,454.703323322181,454.565964531473,0.137358790708
9801807,571.028673156738,571.205550410622,-0.176877253884
9801808,451.856850055826,450.730448223582,1.126401832244
9801809,470.356723012419,469.645935918717,0.710787093701
9801810,557.838219718651,556.609426233852,1.228793484800
9801811,457.545636136896,458.197679305464,-0.652043168568
9801812,532.500795860545,532.194517505173,0.306278355372
9801813,443.431871360315,442.437244455489,0.994626904825
9801814,420.458745986887,421.020436209455,-0.561690222568
9801815,422.499359016740,422.673035971042,-0.173676954302
9801816,579.220502965794,578.968787502734,0.251715463060
9801817,562.958789657086,562.922248864696,0.036540792390
9801818,579.153893461163,578.582824983785,0.571068477378
9801819,599.844672070769,599.554853201808,0.289818868960
9801820,472.380284178666,472.257805482179,0.122478696486
9801821,680.573901483877,680.805072104855,-0.231170620977
9801822,580.222342048449,579.556208522635,0.666133525815
9801823,518.406414726803,517.988894074205,0.417520652598
9801824,476.068991181030,476.120029980762,-0.051038799732
9801825,627.151901286459,626.267832915316,0.884068371143
9801826,577.541347527802,576.485007364997,1.056340162806
9801827,637.550919030828,637.396989010066,0.153930020762
9801828,624.162750004346,623.603052905405,0.559697098941
9801829,695.739676050120,695.333133297527,0.406542752593
9801830,418.947710460980,418.166034171488,0.781676289492
9801831,436.565526383212,435.404965586016,1.160560797196
9801832,495.418042942613,495.811502672818,-0.393459730205
9801833,525.340135936847,525.634520040459,-0.294384103612
9801834,620.272877583155,619.220436432280,1.052441150875
9801835,528.170077506231,528.548772483528,-0.378694977297
9801836,445.545879982860,444.980001932990,0.565878049870
9801837,582.023268184956,582.006628263617,0.016639921339
9801838,492.784257796703,492.133590615634,0.650667181069
9801839,576.180465081608,575.499002544423,0.681462537185
9801840,465.316973938200,465.411786423767,-0.094812485567
9801841,569.786096254348,569.290299796321,0.495796458027
9801842,599.553667222491,599.645014175185,-0.091346952694
9801843,543.146948029879,542.908178975052,0.238769054827
9801844,401.012983435904,401.038314729354,-0.025331293450
9801845,600.663506909719,600.181708692470,0.481798217249
9801846,553.125617037548,552.669763279054,0.455853758494
9801847,575.904149121352,575.899297428961,0.004851692391
9801848,440.252511652797,439.301274676974,0.951236975823
9801849,624.911363633474,624.112594033500,0.798769599974
9801850,377.740127827577,376.594658634647,1.145469192931
9801851,669.932065257644,670.073762971994,-0.141697714350
9801852,667.682952007063,667.549847991509,0.133104015554
9801853,728.704497889539,728.715219333636,-0.010721444097
9801854,547.511686138386,545.853248996351,1.658437142035
9801855,716.458280335505,714.889020256103,1.569260079402
9801856,525.107615060311,524.969245998012,0.138369062299
9801857,669.531740608643,669.124656029127,0.407084579516
```

## Raw gas_stats() JSON by chunk

Candidate means TC-A; baseline means qt1. These are the complete raw arrays, including the Vanilla role and initialization/getName callbacks.

### Chunk 0

```json
{"candidate":[{"role":"Baseline","callback":"afterInitialize","calls":16,"ok":16,"max_ok_gas":21796,"sum_ok_gas":348736,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Baseline","callback":"afterSwap","calls":173905,"ok":173905,"max_ok_gas":22592,"sum_ok_gas":3923776568,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Baseline","callback":"getName","calls":16,"ok":16,"max_ok_gas":21526,"sum_ok_gas":344416,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"afterInitialize","calls":16,"ok":16,"max_ok_gas":92165,"sum_ok_gas":1474640,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"afterSwap","calls":175054,"ok":175054,"max_ok_gas":203313,"sum_ok_gas":22921900052,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"getName","calls":16,"ok":16,"max_ok_gas":21648,"sum_ok_gas":346368,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0}],"baseline":[{"role":"Baseline","callback":"afterInitialize","calls":16,"ok":16,"max_ok_gas":21796,"sum_ok_gas":348736,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Baseline","callback":"afterSwap","calls":174098,"ok":174098,"max_ok_gas":22592,"sum_ok_gas":3928131316,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Baseline","callback":"getName","calls":16,"ok":16,"max_ok_gas":21526,"sum_ok_gas":344416,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"afterInitialize","calls":16,"ok":16,"max_ok_gas":90858,"sum_ok_gas":1453728,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"afterSwap","calls":175865,"ok":175865,"max_ok_gas":208347,"sum_ok_gas":24251508278,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"getName","calls":16,"ok":16,"max_ok_gas":21579,"sum_ok_gas":345264,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0}]}
```
### Chunk 1

```json
{"candidate":[{"role":"Baseline","callback":"afterInitialize","calls":16,"ok":16,"max_ok_gas":21796,"sum_ok_gas":348736,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Baseline","callback":"afterSwap","calls":173288,"ok":173288,"max_ok_gas":22592,"sum_ok_gas":3909844144,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Baseline","callback":"getName","calls":16,"ok":16,"max_ok_gas":21526,"sum_ok_gas":344416,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"afterInitialize","calls":16,"ok":16,"max_ok_gas":92165,"sum_ok_gas":1474640,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"afterSwap","calls":174388,"ok":174388,"max_ok_gas":195977,"sum_ok_gas":22849654830,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"getName","calls":16,"ok":16,"max_ok_gas":21648,"sum_ok_gas":346368,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0}],"baseline":[{"role":"Baseline","callback":"afterInitialize","calls":16,"ok":16,"max_ok_gas":21796,"sum_ok_gas":348736,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Baseline","callback":"afterSwap","calls":173549,"ok":173549,"max_ok_gas":22592,"sum_ok_gas":3915732700,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Baseline","callback":"getName","calls":16,"ok":16,"max_ok_gas":21526,"sum_ok_gas":344416,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"afterInitialize","calls":16,"ok":16,"max_ok_gas":90858,"sum_ok_gas":1453728,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"afterSwap","calls":175406,"ok":175406,"max_ok_gas":208857,"sum_ok_gas":24195407661,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0},{"role":"Submission","callback":"getName","calls":16,"ok":16,"max_ok_gas":21579,"sum_ok_gas":345264,"oog":0,"revert":0,"other_halt":0,"tx_error":0,"bad_return":0}]}
```
### Chunk 2

```json
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```
### Chunk 3

```json
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```
### Chunk 4

```json
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```
### Chunk 5

```json
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```
### Chunk 6

```json
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```
### Chunk 7

```json
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```

## Problems

None. All eight chunks completed, all 128 paired seeds are present, and no chunk was repeated. Both arms meet the 245,000 afterSwap peak gas limit with zero OOG and reverts; TC-A meets the runtime-size limit.