Life In 19x19

do somebody know a (professionnal) game, played under area counting rules, in which the following scheme appears
This variant may be too specific, but similar unremovable kos, something like the original sending-3-returning-1 might have occurred somewhere, maybe from an ignored threat. But pattern ...

The ko rule is not "special" in the sense it does not face adoption resistance, thanks to the last millennium.

But from new inventions, the only thing that recently gained noteworthy support may be the pass for ko rule of J89, and even that is unknown to most players. Territory scoring with simple ...

The alternative that a game can be no-result (or draw), has the opposite problem: it's agreeably lax detection, but produces no positive result.
...
One last issue: Could it be that forcing adjudication of a game is just culturally unacceptable idea in the heartland in those places where the game ...

Thanks again. Apparently, the first issue is that the theme itself is not clear enough:

So from this I am getting the impression that each of the headings represents a problem under some rule set? If that is the case then the overall name of the page "Rules and Area and Territory Scoring" doesn't ...

Thanks for the insight! Most of this was copied from forums, but I tried not to assume rules experience and phrase clean and plain - apparently didn't succeed. Should I add further details, like sequences for some diagrams or more explanations? Or rather there are specific problem points to be ...

I compiled a few recent topics from both here and OGS into a sensei’s page:
RulesAndAreaAndTerritoryScoring .

The idea is to take a look at go rules from the view of expecting (reasonably) coherent gameplay and behavior between area and territory scoring. Basically, to find out what rules work ...

not necessarily whole--Superko rule seems not essential?
Generally, area cannot (directly) use simple ko, territory cannot (directly) use superko. So area encores need some ko fix, to avoid prisoner-unbalanced area repetition breaking the territory-area coherence again. Not necessarily superko ...

A few things I forgot to say at the time - whether to areafy with "pass stone / penalty" or "board play reward" like Maas:

Pass stones do not directly compensate cleanup moves, but via the opponent's pass (if he doesn't respond on board). This needs an arbitrary rule about equal moves in encore ...

I'm confused from my reading about in which (mainstream) rule sets passes can actually lift ko bans.
It's hard to be sure since major Asian rulesets tend to be sparsely worded, and their actual practice not necessarily agrees a too literal reading of their text (over common sense).

As you wrote ...

You assume that a pass lifts a ko ban.
Sure, I think this is essential under territory scoring (w/o encore). The two scoring methods differ greatly here (that's why existing rulesets only combine each with certain ko/superko rules).

Under area scoring, even if the rules don't have ban lifting ...

I don't think this is specific to Nihon Kiin. The example was Spight territory rules, but also in a broader sense:

argument for an open simple ko that the opponent cannot force closed to be a point of territory.
He CAN force it closed, under territory scoring. At most he needs a few passes and ...

Can you elaborate on ko-unsafe encore switch? Is this unique to LM encore?
If encore switch is allowed during an endgame ko fight (like on two pass stops), a player with excess threats can delay winning the ko into the encore (where it worths more). This creates a rather frequent pointwise ...

What do you ask about specifically? Compared to normal play, playing from prisoners gives an extra point for board plays (the removed prisoner), which is like taking an extra penalty for pass plays (as with pass stones). Both effectively switch to area for later phases, and pass stones (with equal ...

2. If so, what is the best and/or typical methodology for the matching rate?
Depends on what meaning would you like to read into the results?

If this is about the strength of those old players (or comparing them), a raw matchrate % seems dubious. A player can have a low matchrate by playing non ...

Since we do not know perfect play, komi serves the practical purpose of enabled a game with close to 50% winning chances between roughly equally strong players. For this purpose, komi can be integer or non-integer - neither is fairer than the other.
Getting offtopic, but area komi 7.5 is known to ...