We just had a situation at a chess club last night that has left me with some rules questions.
The time control for the game was 40/90, SD/30. The clock in question is a Chronos digital clock. The clock was set to count moves.
After almost two hours, I saw that each player had just under an hour left on the clock. Since I knew the game had started on time, I was mightily confused. I guessed that the clock had been set with an initial time control of two hours rather than 90 minutes.
Anyway, three tournament directors discussed how to handle this situation.
We looked through the rulebook for guidance. Rule 16P (“erroneously set clocks”) reads “an erroneously set clock should be handled in the same fashion as a defective clock.” OK, this seems clear enough. Rule 16O (“defective clocks”) reads “A player who wishes to claim any such defect must do so as soon as aware of it.”
Therein is the source of my confusion. I could not find any justification in the rules for a director intervening to correct an erroneously set clock. Both players seemed not to realize the situation. On the other hand, if a player realizes the clock was set with too much time for the time control, that player may not have an incentive to point out the error. (Rule 16O expressly states “A player who wishes to claim …” (emphasis mine). There seems to be no obligation to point out such an error.
Once both players had used more than 90 minutes each before completing 40 moves, the TDs determined that neither would be able to claim a time forfeit (rule 13C13).
On the other hand, once Black completed his 40th move, the clock then added one hour to each side. At that point, the game then potentially have gone two hours longer than it should. Without clear guidance from the rules, and realizing that it was not practical to keep the club open two hours after closing time, the TDs decided to intervene. Since White’s clock showed 1 hour 11 minutes and Black’s clock showed 1 hour 5 minutes, we determined that the players should complete the sudden death time control from that point with White having 11 minutes and Black having 5 minutes. (Our reasoning was that the players had both exceeded the primary time control of 40/90. According to rule 16T, the game continues. The original clock setting gave each side two hours, which is the sum of the primary and sudden death time control. So, we just took away the extra hour the clock added to each side after the 40th move.)
If this were a university exam, I think the next sentence would be: “Discuss.” All clarification will be gratefully received.