Can't win on time with the sole King ?

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AllanJones

I was surprised to be awarded a draw !

I had [king+rook+bishop] vs. [king]

Didn't have enough time to mate and when I ran out of time, I was sure I will loose the game but instead I was awarded a 'draw' with the message 'insufficient material'.

Does it mean that one cannot win on time with the sole king left on the chessboard ?

If I'm not clear, here's the game:

http://www.chess.com/livechess/game?id=867002313

Martin_Stahl

From the last paragraph here;

Finally, note that in cases where the opponent has insufficient material to mate (lone King, King + Knight, King + Bishop, King + 2 Knights) a draw will be automatically declared where there is a time-outThat is for a timeout of the player with the insufficient material.

windmill64

Can't be awarded a win when you can't force one on the board.

AllanJones
Martin_Stahl wrote:

That is for a timeout of the player with the insufficient material.

Yes but in this case, I did time-out and I had enough material to mate {K+R+B]. But instead of a loss, I had a draw.

???

AllanJones
windmill64 wrote:

Can't be awarded a win when you can't force one on the board.

OK, this explains the draw. Thanks.

C_H_E_S_S_S_T_A_R

hum? really strange.  Maybe you should paste this to chess.com staff

ViktorHNielsen

If white loses on time in this position, it is also a draw, since no serie of legal moves will checkmate white:

Jimmykay
BLITZKRIEG_GENERAL wrote:

hum? really strange.  Maybe you should paste this to chess.com staff

This is not strange at at all. Read what windmill said, a little more carefully.

Zigwurst

Post #7 if White runs out of time on an automated server then it would be scored as 0-1, although in the rules of chess that should be 1/2-1/2

Jimmykay
Zigwurst wrote:

Post #7 if White runs out of time on an automated server then it would be scored as 0-1, although in the rules of chess that should be 1/2-1/2

You are talking about the diagrammed position? Both black and white have sufficient material to mate, which is NOT what the original question asked about, by the way.

According if it is white to play and runs out of time, it will be 0-1 here at chess.com AND according to the rules of chess. What makes you think otherwise? That white has mate in 1? Irrelevant.

Zigwurst

It would be regarded as a draw with the FIDE Laws of Chess if White forfeits on time due to the fact that there is no series of legal moves that leads to Black checkmating White.

Jimmykay
Zigwurst wrote:

It would be regarded as a draw with the FIDE Laws of Chess if White forfeits on time due to the fact that there is no series of legal moves that leads to Black checkmating White.

You only now qualified it an said FIDE. You are correct for FIDE, but I think not for USCF.

Black has sufficient mating material, but the rule reads as you stated, for FIDE.

This is a highly unusual position, in that regard. Was the position constructed to show this odd example?

Under USCF rules, I think my original assertion is correct, as USCF does not use the same verbiage. See here, Obscure Differences #8.

ThrillerFan
AllanJones wrote:
Martin_Stahl wrote:

That is for a timeout of the player with the insufficient material.

Yes but in this case, I did time-out and I had enough material to mate {K+R+B]. But instead of a loss, I had a draw.

???


You have it backwards.  The player who still has time on the clock must have sufficient mating material, and contrary to the post after yours, you don't need a forced win.

You can win with one of the following IF there is a forced mate (there are occasional force mates with a lone bishop, for example), but not if it requires a help mate.

The four forms of insufficient mating material are:

Lone King

King and Bishop

King and Knight

King and Two Knights AND the Opponent has no Pawns

 

Now keep in mind, you don't need a winning position.  If you have a King and a Pawn, and your opponent has King, Queen, 2 Rooks, a Bishop, 2 Knights, and 6 pawns, and his clock runs out, you win!

Jimmykay
DoNotThreadOnMe wrote:
ThrillerFan wrote:

"f you have a King and a Pawn, and your opponent has King, Queen, 2 Rooks, a Bishop, 2 Knights, and 6 pawns, and his clock runs out, you win!"

Is that what you teach?

He was explaining the rules to someone who asked. Do you disagree with his explanation of the rules?

SilentKnighte5

We're overlooking what's really important here.  OP has no clue how to win with a K + R v K.  It's not that hard.

bobbyDK
SilentKnighte5 skrev:

We're overlooking what's really important here.  OP has no clue how to win with a K + R v K.  It's not that hard.

yes as soon as you learned how to mate with k+r vs k you should be able to play this at bullet speed. less than 1 second per move.

http://www.chess.com/computer-workout/server/mating-with-a-rook

Ben-Lui
Zigwurst wrote:

It would be regarded as a draw with the FIDE Laws of Chess if White forfeits on time due to the fact that there is no series of legal moves that leads to Black checkmating White.

Surely White is already checkmated here? He's in check, and has no legal move to get out of it.

Jimmykay
Ben-Lui wrote:
Zigwurst wrote:

It would be regarded as a draw with the FIDE Laws of Chess if White forfeits on time due to the fact that there is no series of legal moves that leads to Black checkmating White.

Surely White is already checkmated here? He's in check, and has no legal move to get out of it.

1. Kxc7++

The queen is unprotected.

Zigwurst

The only legal move is 1.Kxc7#

But if white flags

then the game is drawn

since Black can't win

because white's only move wins by force

Ben-Lui

Oops, got my colours mixed up ... Embarassed