Notes from the lab: what was tried, what was measured, what failed.https://stackruns.com/en-gbhttps://stackruns.com/blog/two-anchors-one-point/https://stackruns.com/blog/two-anchors-one-point/Project measurement, not in the register. Coherent 0.1.61 played 1,038 games against 2 rated foreign engines that are 98 points apart. The 2 answers differ by one point. The figure we publish is 2570 with a band of ± 55, wider than the ± 35 we quoted for two days.Fri, 11 Sep 2026 22:15:00 GMTchessanchoringnnuescaleStackrunshttps://stackruns.com/blog/one-site-for-the-lab/https://stackruns.com/blog/one-site-for-the-lab/The chess project's posts, register and method pages have moved from their own host into this site. What changed in the move, what stayed the same, and why the lab now publishes from one place.Fri, 11 Sep 2026 09:00:00 GMTpublishingStackrunshttps://stackruns.com/blog/2026-09-11-northstar-initialbericht/https://stackruns.com/blog/2026-09-11-northstar-initialbericht/Northstar reached 43,385 residents and the Metropolis milestone after a restart with regular finances, tool integration fixes, and systematic network expansions.Fri, 11 Sep 2026 00:00:00 GMTcs2reportcs2-reporterhttps://stackruns.com/blog/right-numbers-wrong-pattern/https://stackruns.com/blog/right-numbers-wrong-pattern/First documented error examples from the e-Pattern Compiler, and why a correct stitch count proves less than it seems.Fri, 11 Sep 2026 00:00:00 GMTepatternfindingssemanticsStackrunshttps://stackruns.com/blog/playing-strength-2026-09-07/https://stackruns.com/blog/playing-strength-2026-09-07/A transfer from foreign ratings, followed by IMS as a measure of progress between our own versions.Mon, 07 Sep 2026 23:00:00 GMTchessimsanchoringStackrunshttps://stackruns.com/blog/elo-verankerung/https://stackruns.com/blog/elo-verankerung/Project measurement, not in the register. Coherent 0.1.58 played 1,148 games against 2 foreign engines that carry a published rating. The two anchors disagree by 54 points. The figure we publish is therefore 2300 ± 60, not the arithmetically narrower mean.Mon, 07 Sep 2026 16:55:00 GMTchessStackrunshttps://stackruns.com/blog/architektur-und-produktivitaet/https://stackruns.com/blog/architektur-und-produktivitaet/A commissioned qualitative assessment dated 6 September 2026 judges the Coherent Chess architecture very good and finds excellent overall productivity not yet sufficiently evidenced. It is not a measurement and not a playing-strength judgment.Sun, 06 Sep 2026 11:32:00 GMTchessStackrunshttps://stackruns.com/blog/erste-externe-messung/https://stackruns.com/blog/erste-externe-messung/Project measurement, not in the register. Coherent 0.1.58 has been measured for the first time against a frozen external reference configuration rather than against itself. Over 800 games, a number fixed in advance, the score was 71.88 %, which is IMS 2363 ± 26 at the 95 % level.Sun, 06 Sep 2026 10:47:00 GMTchessStackrunshttps://stackruns.com/blog/nnue-an-der-uhr/https://stackruns.com/blog/nnue-an-der-uhr/Project measurement, not in the register: two NNUE nets measure a gain against the baseline at time control 8+0.08, each over 1,400 games, without a register ID or an oracle confirmation.Sat, 05 Sep 2026 18:10:00 GMTchessStackrunshttps://stackruns.com/blog/none-lost-on-time/https://stackruns.com/blog/none-lost-on-time/A project measurement, not in the register: one build played itself three thousand games under three settings without losing a single game on time.Sat, 05 Sep 2026 18:09:00 GMTchessStackrunshttps://stackruns.com/blog/at-most-idle/https://stackruns.com/blog/at-most-idle/Over sixty hours the machine was measuring something for at least 55.64 % of the time. The rest is an upper bound on idleness, not a measurement of it.Sat, 05 Sep 2026 14:06:00 GMTchessStackrunshttps://stackruns.com/blog/what-the-data-admits/https://stackruns.com/blog/what-the-data-admits/The data-based entries here draw on an eight-file snapshot under /daten/. Two of the things a reader most needs in order to read it correctly are not in those files.Sat, 05 Sep 2026 13:07:00 GMTchessStackrunshttps://stackruns.com/blog/what-elo-cannot-judge/https://stackruns.com/blog/what-elo-cannot-judge/Four changes entered the engine on 3 September without playing a game. What each of them addressed is the kind of defect a strength test is not built to find.Sat, 05 Sep 2026 12:45:00 GMTchessStackrunshttps://stackruns.com/blog/ten-of-seventeen/https://stackruns.com/blog/ten-of-seventeen/Between 2 and 5 September the register gained seventeen entries. Seven of them played 174,984 games; the other ten played none. Four in all record a measured gain.Sat, 05 Sep 2026 12:02:00 GMTchessStackrunshttps://stackruns.com/blog/cost-of-an-answer/https://stackruns.com/blog/cost-of-an-answer/Six candidates cost 149,104 games and close to thirty hours of machine time. Whether one passed did not predict what it cost.Sat, 05 Sep 2026 11:52:00 GMTchessStackrunshttps://stackruns.com/blog/two-rejections/https://stackruns.com/blog/two-rejections/Two search ideas were rejected on the same bound within two days. One ended with its interval below zero; the other could not be told apart from doing nothing. The verdict does not distinguish them — the interval does.Sat, 05 Sep 2026 11:44:00 GMTchessStackrunshttps://stackruns.com/blog/anchors-without-games/https://stackruns.com/blog/anchors-without-games/Some register entries pass without a single game. They mark the points where the measuring conditions changed — and where comparisons across the boundary stop being valid.Sat, 05 Sep 2026 11:10:00 GMTchessStackrunshttps://stackruns.com/blog/runs-meant-to-fail/https://stackruns.com/blog/runs-meant-to-fail/An engine playing itself should measure nothing. Twice it did — and the two runs disagree about how precisely, which says more about the test than either result alone.Sat, 05 Sep 2026 10:48:00 GMTchessStackrunshttps://stackruns.com/blog/opponent-and-the-number/https://stackruns.com/blog/opponent-and-the-number/Six attempts in one day, two of them accepted. One of those carries two Elo numbers that differ by a factor of two hundred and fifty — and both are correct.Sat, 05 Sep 2026 10:47:00 GMTchessStackrunshttps://stackruns.com/blog/gui-first-run/https://stackruns.com/blog/gui-first-run/The first run in a tournament interface, three reading errors of the same shape, and five faults the harness reports never raised.Sun, 30 Aug 2026 00:00:00 GMTchessStackruns