Re armageddon, there is sometimes bidding ("how much time they're willing to give up to play with their desired color") instead of pre-determined 5min vs 4min.
What happens if the bid is drawn?
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1Why the recent obsession with Armageddon bidding?– DavidCommented Feb 11, 2023 at 18:52
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1@David because of the Airthings Masters that just happened? especially with Magnus' "soul read" I guess a lot of people suddenly found it more entertaining– MattCommented Feb 12, 2023 at 3:53
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@David I believe armageddon links to chess960. I plan to make a post soon. In xiangqi, their armageddon was invented by Ronghua Hu, their Bobby Fischer.– BCLCCommented May 31 at 4:32
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@Matt also the 2022 WFRCC & 2022 9LX.– BCLCCommented May 31 at 4:33
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2 Answers
Depends on the rules being used. A likely scenario is that an additional tie-break would be used.
For example, in the regulations for the 2016 US Championships:
If both Players bid exactly the same amount of time, the Chief Arbiter will flip a coin to determine who shall choose their color.
answered Feb 7, 2023 at 13:52
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A more elegant solution (that I have not yet seen used though) would be to simply force one of the players to bid an odd number of seconds and the other an even, preventing a drawn bid in the first place.– ChrisBCommented Apr 8, 2023 at 4:52
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1Well, that distinguishes the players a priori, so is less elegant in that way. Commented Apr 8, 2023 at 12:04
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@ChrisB When you flip it doesn't matter because both players are indifferent. They could even give white to lower rated or 1st in alphabetical order. Right? If they both believe 9:37/15:00 is the optimal amount then the even time player is at a disadvantage. However ... If an armageddon bid is drawn, then is it fair to force a re-bid?– BCLCCommented May 31 at 4:37
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A coil flip could be used to decide who bid odd and who even. Commented May 31 at 10:49
Update: In 2023 or 2024 Champions Chess Tour, they re-bid. Not sure this is still fair. If they bid the same, then they can flip a coin because they are indifferent in colour. Now that they are forced to re-bid... Idk.