While analyzing a game, I switched to Practice vs Computer (White). Black was one move away from checkmate (not forced) if my Black Queen captured White's f3 pawn. The computer's White Queen began a perpetual check of my King. After 12 checks the game was automatically drawn. Why? Where was the perpetual check? The last check was on move 54.
The rule requires a threefold repetition of position.
The position on move 3, 9 and 14 repeats after Qc8+.
The rule requires a threefold repetition of position.
The position on move 3, 9 and 14 repeats after Qc8+.
I see. So, Black needed to stay off the 8 rank after move 9 (the 2nd repeat of Qc8+)? Also, the threefold repetition doesn't have to be consecutive moves (sequential)? (Edit) Okay, I understand now that Perpetual Check is not a rule that allows an automatic draw. However, Threefold Repetition of Position is a rule that allows a draw if it's claimed by the player making the 3rd repetition. In otherwords, in this game, White claimed the draw because Black blundered by moving onto the 8 rank?
"9.2.1
The game is drawn, upon a correct claim by a player having the move, when the same position for at least the third time (not necessarily by a repetition of moves):
9.2.1.1
is about to appear, if he first writes his move, which cannot be changed, on his scoresheet and declares to the arbiter his intention to make this move, or
9.2.1.2
has just appeared, and the player claiming the draw has the move.
9.2.2
Positions are considered the same if and only if the same player has the move, pieces of the same kind and colour occupy the same squares and the possible moves of all the pieces of both players are the same. Thus positions are not the same if:
9.2.2.1
at the start of the sequence a pawn could have been captured en passant
9.2.2.2
a king had castling rights with a rook that has not been moved, but forfeited these after moving. The castling rights are lost only after the king or rook is moved."
https://handbook.fide.com/chapter/E012018
So, after move 9 (2nd repetition of position with check) if 10. Qd7+ Kg6 11. Qc8 (3rd repetition without check), is that a draw? Or, does the 3rd repetition have to include the check?
Where was the perpetual check?
Just take a look at what white is doing, it is a beautiful and easy-to-see perpetual check on the h3-c8 diagonal (h3-g4-d7-c8). It does not matter if the rulebook says 3-fold repetition or 3-billion-fold, black can't escape.
#5
The above Laws of Chess describe exactly what 3-fold repetition means.
As #2 correctly mentioned: the 3 positions after 3 Qc8+, 9 Qc8+, and 14 Qc8+ are exactly the same hence draw.
#5
The above Laws of Chess describe exactly what 3-fold repetition means.
As #2 correctly mentioned: the 3 positions after 3 Qc8+, 9 Qc8+, and 14 Qc8+ are exactly the same hence draw.
Was there any move Black could have made to prevent White's threefold repetition? Also, is the rule satisfied because the White Queen landed on c8 three times? Or, is the rule only satisfied if landing on c8 checks the Black King each time?
#5
The above Laws of Chess describe exactly what 3-fold repetition means.
As #2 correctly mentioned: the 3 positions after 3 Qc8+, 9 Qc8+, and 14 Qc8+ are exactly the same hence draw.
Was there any move Black could have made to prevent White's threefold repetition? Also, is the rule satisfied because the White Queen landed on c8 three times? Or, is the rule only satisfied if landing on c8 checks the Black King each time?
The move doesn't matter. What matters is the resulting position.
Each and every piece has to be on the same exact square. And in each case, it has to be the same person's turn to move. And, none of the special move possibilities, like castling or capturing en passant, can have changed.
If you click on the moves #3 ,#9 and #14, the pieces don't appear to move.
#8
"Was there any move Black could have made to prevent White's threefold repetition?"
No, there was no escape to the perpetual check and hence a 3-fold repetition of positions.
helo
"Also, is the rule satisfied because the White Queen landed on c8 three times? Or, is the rule only satisfied if landing on c8 checks the Black King each time?" To answer my own question, I checked all the moves again and found that the White Queen had landed on two other squares three times (g4 & d7) before landing on c8 for the third time. However, on one of those occasions the Black King was on a different square. So, evidently the entire board position must be identical on three occasions to satisfy the threefold repetition rule.
Since you had a question about perpetual check, I just want to add that checking the king is not necessary for the draw claim. The checks force the repetition, but they are just a means to an end e.g. 3 fold repetition of position.
Since you had a question about perpetual check, I just want to add that checking the king is not necessary for the draw claim. The checks force the repetition, but they are just a means to an end e.g. 3 fold repetition of position.
Thankyou. Good point. I could imagine if one player wanted to exchange rooks, for example, they could chase the opposition rook until either an exchange was granted, or a threefold repetition occurred.
While analyzing a game, I switched to Practice vs Computer (White). Black was one move away from checkmate (not forced) if my Black Queen captured White's f3 pawn. The computer's White Queen began a perpetual check of my King. After 12 checks the game was automatically drawn. Why? Where was the perpetual check? The last check was on move 54.
no this is not
While analyzing a game, I switched to Practice vs Computer (White). Black was one move away from checkmate (not forced) if my Black Queen captured White's f3 pawn. The computer's White Queen began a perpetual check of my King. After 12 checks the game was automatically drawn. Why? Where was the perpetual check? The last check was on move 54.