Bulldog Endgame Theory

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Avatar of aronian22
PandasAwesome wrote:
captaintugwash wrote:

How about K+N+N vs K+W?

Gotta be a draw, the witch can sacrifice itself every turn, since 2 knights vs. king is draw.

Well this is an interesting one. I know K+N+N vs K+P is often a win. I think it would be a draw, because white always was to act with checks. What I mean by that is that while with a pawn, white can block the pawn, with a witch you can't. So I believe it is drawn.

Avatar of aronian22

No, because the Witch can't take pieces. The king is never under threat.

Avatar of captaintugwash

Here's the basic idea...

white to move, mate in two...

 

 

Avatar of aronian22
captaintugwash wrote:

Here's the basic idea...

white to move, mate in two...

 

 

Right, this is mate. But like I stated before, it's impossible to actually get here if black plays well. White can't force the king to the corner.

Avatar of captaintugwash

I'm not actually sure. The witch might actually come to black's rescue here, because white cannot put black in zugzwang. 

If it's K+N+N vs K, then the knights can force the black king into the corner, they just can't force checkmate, they will stalemate the king trying.

Avatar of aronian22

In this case, we maybe shouldn't even think of the witch as a piece. Instead, it's a free tempo that stops white from being able to push the king back.

Avatar of captaintugwash

I think it's winning. 

Avatar of captaintugwash

Ok then panda...

1. Kg2

Avatar of aronian22

Yeah, it might well be. The theory of it is saying that it should be drawn but I haven't looked at anything concrete

Avatar of Marks1420

This may sound bizarre, but I believe two bishops vs a guard is a win for the bishops. 

Avatar of captaintugwash

Hmm there is perhaps one resource that black has... he can use his witch to block a knight, since I cannot capture (unless it's a checkmating move of course). I think white is winning by force here if black centralises his king and then wastes moves with his witch when not in check, but if black uses the witch to deny my knight good squares, that might be enough to draw. 

Avatar of captaintugwash
Marks1420 wrote:

This may sound bizarre, but I believe two bishops vs a guard is a win for the bishops. 

No chance.

Avatar of Marks1420
captaintugwash wrote:
Marks1420 wrote:

This may sound bizarre, but I believe two bishops vs a guard is a win for the bishops. 

No chance.

The bishops have the ability to separate the king and guard by putting them on cross-hairs. I don't know if they can also push the guard back so the king can invade.

Avatar of aronian22
Marks1420 wrote:

This may sound bizarre, but I believe two bishops vs a guard is a win for the bishops. 

That actually sounds feasible. I'm not sure if it is or not though. Do you have lines or anything?

Avatar of captaintugwash
Marks1420 wrote:
captaintugwash wrote:
Marks1420 wrote:

This may sound bizarre, but I believe two bishops vs a guard is a win for the bishops. 

No chance.

The bishops have the ability to separate the king and guard by putting them on cross-hairs. I don't know if they can also push the guard back so the king can invade.

Assuming the guard is already close to the king, I can't see how the bishops can forcefully separate them. Once the guard is blocking checks, it's easy for black to hold.

 

I think, anyway.

Avatar of Marks1420

In this position, they must separate at least  temporarily. 

Avatar of Marks1420

Black to move ^^

Avatar of aronian22

I don't see a win after Kc6.

Avatar of captaintugwash

If it's white to move there, it's clearly winning for white with Bf2. I can certainly see how black can blunder it. 

As for black to move...

Gd3 I guess

Avatar of Marks1420

Nobody can see a win after Kc6, we would need an engine for that. 

 

I'll revise my statement: White has a better chance to win with Two Bishops vs Guard than Queen vs Guard.