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vondrack

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Praha, Czech Republic
Jan 2002 time: 06:32
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Mmmm... excuse me, gentlemen, but after reading through the 4-roll combat threads for several days, I am still lost when it comes to the principle of it - especially after reading Mike's comment (quote: "I don't know where Jesse got the "rerolling for ties" thing because there are no ties.").
Does anyone know for sure how this averaging is going to work? I can imagine two possibilities:
a) averaging "combat round" results
(this would be close to, but not the same as quadrupling the unit hitpoints)
roll 1 = 0.5900
roll 2 = 0.3571
roll 3 = 0.9710
roll 4 = 0.4839
Assuming the attacker needed ~0.6 to win, he would lose 3 out of 4 sub-rounds and lose the "big" round.
This is what everybody seems to assume - but it is probably not the case, as Mike B. clearly stated there is no way to achieve a "tie" - if this was true, a tie would be very possible with two rounds won by both sides.
b) averaging RNG values directly before using the value to determine the combat round result
roll 1 = 0.5900
roll 2 = 0.3571
roll 3 = 0.9710
roll 4 = 0.4839
===========
total = 2.4020
avrg = 0.6005
Assuming the attacker needed ~0.6 to win, he would win the round, since 0.6005>0.6 (the average of four consecutive RNG rolls would be higher than 0.6, despite only one of the individual rolls being higher than that in itself).
If this is the case (and I am, again because of Mike's comment, inclined to believe it is), then I am lost as far as all the "calculations" here showing how unbalanced the game will become... because there is, IMHO, no way to figure these numbers up using the current combat calculators - all of them operate upon the assumption that each roll is equally probable (which, however, would not be the case here - "averaged" 0.9999 would certainly be much less probable than "averaged" 0.5555, since you would need 4 consecutive "raw" 0.9999s to get one "averaged" 0.9999).
Does anybody know for sure how the averaging would be implemented?
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Jeem
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Ayrshire, Scotland
Sep 2001 time: 05:32
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quote: Originally posted by notyoueither
I just tried it 10 times. 12 archers vs a size 7-12 city on grass (I couldn't get the AI to not sell the walls at size 6 )
6 times the archers won through. It took 11, 4, 9, 11 , and 9 archers attacking in those cases. |
Then maybe the problem is when the 4 took it? Does that appear little bit too random?
Let's be clear here - 80 shields worth of archers in no way compensates for 90 shileds worth of Pike, the effort made to get iron, the effort made to get to Fuedalism, the 30 shields for the Settler and 20 for the walls. It's the randomness that is the problem - when you defend with a certain level of defence, you expect to see some good results for it. When the first 4 archers take down 3 Pike, you begin to wonder why you bothered defending and didn't just go all out on attack again.
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vondrack

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Praha, Czech Republic
Jan 2002 time: 06:32
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quote: Originally posted by notyoueither
Isn't it plain that averaging will benefit the superior value? |
My feeling is the correct statement would be "it will benefit significantly superior units" - as in, say, "twice as...". The "streak" defeating (very) bad odds will need to be longer (but admittedly not so "dense").
If you ask me... I believe that a warrior should VERY seldom (almost never) win over a spearman - his A rating is half the spear D rating! That sounds like an overwhelming advantage. The warrior guy has a funny hammer only, while the spear guy has a shield and a long sharp stick... j/k 
I would consider it ok if I needed an archer to have even chances against a spear (A2 vs. D2).
What I am questioning is all those impressive numbers, not the fact that the change may be unbalancing. I do not know how all those numbers were determined (especially if it was using 'modified' combat cals we use these days). It's been some time I left the uni, so I need someone to help me out with my maths...
Can someone explain to me how the odds of a, say, vet knight attacking a fortified vet spear on a hill were calculated (under the new 4-roll system)?
quote: Originally posted by Tiberius
If I understand it correctly, the more times you average a result, the closer it will be (statistically) to 0.5, which means that a unit having better chances to win (0.6 in your example) will (amost) always win. |
This would be true, but only speaking about large data sets (averaged). An average of 4 consecutive RNG rolls may adjust the distribution curve only moderately, cutting the number of "outrageous" combat results (like MIs on offense losing to longbows on defense... ).
Again... I am honestly asking the question: how do you compute the odds of a knight killing a fortified spear on a hill under the new 4-roll combat system? I admit I'm no longer a math freak, I am making my living reselling software and that does not need any fancy math... 
As for "why 4?" - that's another thing that leads me to believe the change may be at least worth trying... The guys at Firaxis/BA are not idiots and have undoubtedly playtested this system... I would assume that averaging 4 rolls was giving the "most acceptable" combat results (as in "they felt most acceptable").
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Rommel2D
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ACS Staff Member / Hosted Site Admin
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Upper Midwest
Feb 2003 time: 23:32
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quote: Originally posted by Jeem:
The whole reason the combat rolls are not being changed, but are being done 4-times and averaged, is because they don't want to change the code. |
How are they doing this without changing code? How are they going to present an option to the player of what combat system to use without changing code? My concern here is that alexman has a sizable list of things to fix that are alot more aggravating to deal with than losing some combats to 'excessive randomness'. Of course- since this is such a huge change- if they are set on doing it, the sooner they start testing, the better the end result.
Just to throw something out there- If hit points were modded to 8 (conscript), 12, 16, and 20(elite), (assuming promotions could be granted in 4 point chunks), would this achieve the single-case stability of the 4 roll system, while allowing streaks and lightweight units to still make a dent? It might be a pain to sit through big battles, but the graphics could be sped up (or shut off?) pretty easily.
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Jeem
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Ayrshire, Scotland
Sep 2001 time: 05:32
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nye - I just ran the test myself (3 vet pike in a city attacked by 12 vet archers).
the results were :-
1) 1 dead archer
2) 10 dead archers, last pike on 1 hp (already the flaw in combat should be apparent)
3) 4 dead archers
4) 8 dead archers
5) 7 dead archers
6) 8 dead archers
7) 6 dead archers
8) 4 dead archers
9) 6 dead archers
10 11 dead archers, two pike left on 1hp.
Averaging 6 dead archers. Did you leave the defending player on the romans or some other militaristic nation?
Regardless, any system which allows the variance in results, two combats in a row (like in my first two), cannot be good.
And as far as I can see, rushing 3 pike behind walls with 12 archers is a pretty good idea.
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vondrack

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Praha, Czech Republic
Jan 2002 time: 06:32
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quote: Originally posted by DrSpike
Well what you are familiar with is I suspect the probability of a unit winning one round of combat, reducing the opponent by one hitpoint.
To carry that forward to working out the probability of an overall victory it's easiest to use a form of the binomial distribution, though you can calculate longhand. |
Ah, no, not really - I perfectly understand and am able to mathematically calculate the probability of the whole battle (the whole math underneath the current combat calcs is perfectly known to me - it's widely assumed that the distribution of the RNG rolls is generally uniform, right? as in the probability of every number within the RNG value interval is the same?).
quote: Originally posted by DrSpike
The averaging makes things a little trickier. Essentially you need to know what distribution the 'random' part comes from (some have plausibly analysed the uniform distribution), then look at the effect on the variance of your statistic as the number of draws increases. This variance reduction increases the chance of the most advanced unit winning.
To do all this correctly is not really that difficult, but some knowledge of statistical methods is necessary not to make errors. The worst part is posters misunderstanding the analysis of clever people over at CFC and then joining here just to mistakenly correct clever people here. But lets not go into that. |
Well, yes, I intuitively understand that averaging makes things more tricky - that's why I am asking about how to compute the probability of the average of two numbers, given their own probabilities/distributions... is there a mathematical formula?
If I had more time, I would be less lazy and use a piece of paper and some of my brains (it still works, just the boot-up time increases and often, the thing just refuses to work completely... but when it fires up, it's still got some decent potential... ).
Anyway... I do not think I will have time enough for this until the end of the year, so just forget it - I only felt many posters misunderstood the implementation of the averaging (and the thread over at CFC demonstrated that quite well - even over there, the understanding in the beginning was wrong).
The averaging as I understand it from Mike's post is NOT "you need 3 wins out of 4". It's just that you roll four dices and do your fight with the average of the rolled numbers, which is something different.
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Jeem
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Ayrshire, Scotland
Sep 2001 time: 05:32
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I did not fortify the pikemen - I went with the 4.8 defence that nye used.
I wasn't even sure if fortifying when inside walls counts - I thought that the walls 50% superceded the fortified 25% instead of being cumalative?
4 Pikemen should indeed do much better because generally speaking you need 4 archers for every pike to make victory a very good bet.
But I'll try it out anyway...
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Andydog
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London
Jan 2001 time: 05:32
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In an effort to understand exactly how the game balance would be affected in the ancient age with the introduction of the 4 roll combat system, we should firstly look at the various scenarios. The probabilities have been obtained from using alexman’s combat calculator, I assume they are correct…
First of all, lets examine a regular archer, attacking a warrior:
Regular archer attacks:
Regular unfortified warrior on grassland: Archer wins 95% of the time.
Veteran unfortified warrior on grassland: Archer wins 91% of the time.
Elite unfortified warrior on grassland: Archer wins 87% of the time.
Regular fortified warrior on grassland: Archer wins 86% of the time.
Veteran fortified warrior on grassland: Archer wins 78% of the time.
Elite fortified warrior on grassland: Archer wins 70% of the time.
Veteran fortified warrior on hills: Archer wins 50% of the time.
Vereran fortified warrior on mountains: Archer wins 22% of the time.
Regular fortified warrior in walled town on grassland: Archer wins 44% of the time.
We can see that the warrior would stand a good chance if fortified on hills or mountains. Walls are now much more valuable to the defender. On the open grassland, expect the archer to loose in only a few circumstances.
Now assume that the regular archer was attacked or bombarded first, and had his hit points reduced.
2 hp archer attacks:
Veteran unfortified warrior on grassland: Archer wins 75% of the time.
Veteran fortified warrior on grassland: Archer wins 57% of the time.
Veteran fortified warrior on hills: Archer wins 30% of the time.
1 hp Archer attacks:
Veteran unfortified warrior on grassland: Archer wins 43% of the time.
Veteran fortified warrior on grassland: Archer wins 27% of the time.
Veteran fortified warrior on hills: Archer wins 11% of the time.
The odds in favour of the archer winning reduce significantly with reduced hit points. Bombardment has become a major defensive tactic and can be used to swing the odds in favour of the defender.
Now lets look at a veteran archer vs spearman:
Veteran archer attacks:
Regular unfortified spearman on grassland: Archer wins 54% of the time.
Veteran unfortified spearman on grassland: Archer wins 39% of the time.
Elite unfortified spearman on grassland: Archer wins 25% of the time.
Veteran fortified spearman on grassland: Archer wins 16% of the time.
Veteran fortified spearman on hill: Archer wins 4% of the time.
Veteran fortified spearman in walled town on grassland: Archer wins 3% of the time.
Veteran fortified spearman in walled town on hill: Archer wins 1% of the time.
So the archer is much less effective against the spearman, especially if the spearman is fortified. City walls make it near impossible. If that spearman has dug himself in on a hill, forget it - either wait until you have a stronger unit, or bombard the puss out of him first:
Vet archer attacks:
2hp fortified spearman on hill: Archer wins 27% of the time.
2hp fortified spearman in walled town on grassland: Archer wins 23% of the time.
2hp fortified spearman in walled town on hill: Archer wins 12% of the time.
1hp fortified spearman on hill: Archer wins 60% of the time.
1hp fortified spearman in walled town on grassland: Archer wins 56% of the time.
1hp fortified spearman in walled town on hill: Archer wins 41% of the time.
So archers are STILL USEFUL, but you need to get mathematics and build lots of catapults, and use them until every defender in the city is down to preferably 1 hp. On defence, look at how secure towns are when they’ve been founded on hills.
Now lets look at swordsmen vs speamen.
Veteran Swordsman attacks:
Regular unfortified spearman on grassland: Swordsman wins 91% of the time.
Veteran unfortified spearman on grassland: Swordsman wins 84% of the time.
Elite unfortified spearman on grassland: Swordsman wins 76% of the time.
Veteran fortified spearman on grassland: Swordsman wins 64% of the time.
Veteran fortified spearman on hill: Swordsman wins 31% of the time.
Veteran fortified spearman in walled town on grassland: Swordsman wins 25% of the time.
Veteran fortified spearman in walled town on hill: Swordsman wins 10% of the time.
So again, it’s still tough for the swordsman against a fortified spearman. Lets hit the spearmen with a few catapults:
Veteran Swordsman attacks:
2hp fortified spearman on hill: Swordsman wins 68% of the time.
2hp fortified spearman in walled town on grassland: Swordsman wins 62% of the time.
2hp fortified spearman in walled town on hill: Swordsman wins 42% of the time.
1hp fortified spearman on hill: Swordsman wins 88% of the time.
1hp fortified spearman in walled town on grassland: Swordsman wins 85% of the time.
1hp fortified spearman in walled town on hill: Swordsman wins 72% of the time.
What can we conclude from all this?
Under the 4-roll combat system, the attacking ‘warmonger’ player would need to attack with a variety of units. They need to administer significant bombardment, need to defend their attacking units against return bombardment, and need to recognise that targets fortified on hills, on mountains, and behind walls to be much more difficult and will required lots more bombardment and/or lots more attacking units. The militaristic trait will become more valuable for the warmonger as they can build cheap barracks and produce veteran attacking units that will be promoted quickly, and we've seen how an extra hp now goes a long way. Those civs with strong attacking UUs in the ancient age will become more valuable (Iroquis mounted warriors, Persian immortals). Tech-wise they will now need to place a higher priority on Mathematics for catapults, but Warrior Code for archers, Bronze Working for spearmen, and Iron Working for swordsmen remain priorities as before.
The defensive ‘builder’ player is now able to defend their cities effectively in a variety of ways - Walls are now much more effective (as are fortresses), and cities built on hills are a tough target for the aggressor. Masonry becomes more of a priority (for Walls). The defence bonuses of terrain are much more significant.
Ultimately I think the strategy of war will become much more pronounced. With more certain results comes more careful planning, and this can only be a good thing in my book. I think in general it will be harder for the warmonger, but as things currently stand, I believe that this is also a good thing. IMHO war is too dominating in the current game. It is much harder for the ‘builder’ player to build AND fight off a warmonger, especially early on, and therefore I see the current game as being unbalanced toward the warmongers. With the 4-roll combat system the warmongers are going to have to carefully plan and be certain of their war strategy before attacking a builder.
The only real problem I can see with the introduction of this 4-roll combat system is with the AI not being able to use bombardment. An AI has never attacked me using catapults, cannons etc, and so I could see that they’d just carry on hurling loads of attacking troops at you but would now suffer huge losses. The AI’s need to prioritise bombardment like the human player would, and I’m not sure how much extra work this would involve for the programmers.
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Jeem
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Ayrshire, Scotland
Sep 2001 time: 05:32
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12 veteran archers attacking 4 veteran, fortified pike in a size 7 city.
1) 9 dead archers, 3 dead pike (last pike has 1hp)
2) 9 dead archers, 3 dead pike (last pike has 1hp)
3) 10 dead archers, 2 dead pike (1 on 2hp, 1 on 1hp - and a great leader!)
4) 6 dead archers, 4 dead pike
5) 11 dead archers, 1 dead pike (all 3 remaining pike on 1hp)
6) 6 dead archers, 4 dead pike
7) 11 dead archers, 1 dead pike (and great leader)
8) 10 dead archers, 2 dead pike
9) 8 dead archers, 4 dead pike
10) 9 dead archers, 3 dead pike (last pike has 1hp)
No real surprises looking at my previous run with 3 pikemen. There is still the problem of streaky results though. I've gone from killing 11 archers and getting a great leader to losing the city for only 6 dead archers.
This is a very small example, and the results are far too varied. It's not the final result per-se, but the fact that far too often, a combat you would expect to win fairly comfortably will go to crap.
By rolling 4 times and averaging, the unit with the best value will win more often. However, as Jesse mentioned in his first post - there might be a problem with experience gains. I agreed with that, and having seen this I still do. ALL my Pike finished at Elites, every combat. That is the main reason why the archers struggled more here - those times when the pike survived on 1hp would not have happened if not for the automatic experience gain from winning 2 fights same turn.
That is why I said 2-rolls with 3-victory experience gain, or 3-rolls with 4-victory experience gain would get Firaxis closer to what they are looking for. The better unit will win each round more often, but will not gain experience so often. This will give the lesser units a better chance of whittling them down and it'll all probably end up looking fairly balanced.
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Aeson
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orangesoda
Nov 2001 time: 22:32
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I think any changes to the combat system should be aimed at making all units useful in some context. If a unit isn't worth building, it shouldn't be in the game in the first place.
Currently, most units can be effective used correctly. Even most the 'useless' units are worth building if soley for upgrade purposes. Games can be won both with agressive warmongering (from a technical or numerical superiority), turtling, or something inbetween. There are situations where a certain playstyle is a must, but not due to the combat system. I don't think it needs fixing.
The difference I see this change making to the game is that conquest becomes slower in a broad scope, and quicker is a more narrow scope. This isn't a problem in and of itself, but it changes the entire feel of the game dramatically and reduces viable style of play. There will be certain very small windows of opportunity to dominate offensively. To play warmonger well the player will have to play in a manner to take advantage of those. Beelines and rushes (in a literal sense) will only become more important.
Numerical superiority will be largely irrelevant, only technical superiority matters. This may appeal to some players, but how it is now, both are balance reasonably well. I enjoy playing both ways, and either route can be taken and the game still played effectively.
As for 'luck'. By reducing luck in individual combat this way, luck will be an even bigger factor in the overall scope of the game. A military leader for an Army will be the end all be all of warfare. Get it at the right time and you've basically won the game if you wish to apply your advantage. It's already that way to some extent, but this will just exacerbate the problem even further.
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