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Practice English Speaking&Listening with: Chess Trick #1: Quickly Calculating King vs. Pawn Movements

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Hello everybody, itís Jrobi. This is a re-do of a video that I had earlier that had some

problems with it and I did make a response video to the original video and Iíd like

to thank Pesslet and Escpade for pointing out the problems with that one. But this last

week here Iíve had actually more views on the original video than the re-do video so

I figured probably it would be best to take those two videos down and make this one fully

updated and fully correct for people to view, especially as I get new subscribers they might

not catch the response video to the original video that had a problem. And I donít know

how many times I can say video in this video but weíre getting up there. So anyway, this

chess trick has to deal with quickly calculating king and pawn endgames. So in other words,

letís say you were playing white in this position, it was white to move. You might

try to think of a couple strategies here, for example, you might try to factor what

would happen if you took your bishop and took this pawn, king takes pawn and then you take

the black bishop. Because the way the way the black bishop is currently positioned if

it gets away itís going to stop the white pawn or at least probably force a draw if

it gets anywhere along the diagonal to hit the G7 square, which this pawn has to cross.

So in a chess match if you donít know this chess trick what youíre going to end up doing

is youíre going to end up calculating how many moves itís going to take and then youíre

also going to end up calculating will my pawn make it to the end of the board before the

enemy king does? So youíd probably go okay one move here, black takes, white takes, black

moves king here and then you would count the squares in your head. And Iím sure if youíre

really good at doing this it probably wouldnít take you too long, but thereís definitely

a shorter way to do it. And I came across this strategy when I was watching Josh Waitzkinís

video that he has on the Chessmaster Series and basically what it is, is to calculate

it: You can do it a lot quicker by drawing the diagonal from the pawn up to the eighth

rank, so whether youíre white or black and then you create a square. So you just kind

of go like this in your head and you create a square all the way to the eighth rank and

if the enemy king is outside this square, either on the side away from the pawn or below

the pawn, there is no chance that that enemy king is going to be able to capture your pawn.

So your pawn will be able to freely march up and promote. Now obviously if the enemy

king would be on the right hand side of the box in this example or anywhere, as you can

see in the highlighted squares, itís going to be able to capture your pawn. Weíll go

through a couple more examples but I just want to show you this one first. But it is

important to know that if the enemy king on the next move can get into the highlighted

area, it will be able to capture that pawn. So letís go through with the line here and

see what happens. So bishop takes pawn, king takes bishop, king takes bishop, black king

moves, and now letís draw the square again. So according to the square here the black

king is outside the highlighted square so it shouldnít be able to capture the pawn.

So white pawn moves, black moves, pawn, king, pawn, king and itís going to promote and

white is going to have the victory here. So letís take a look at a couple more examples

and weíll go from there. In this example here we have an almost identical setup. The

king, however, instead of being on the A file itís now on the B file and so weíll go through

a line here and so weíll go bishop takes, king recaptures, king takes bishop and now

king moves up to C4. So letís draw the square now and see if the king is inside the highlighted

area. So as you can see, the king is in the highlighted area so it should be able to catch

the enemy pawn here. Now this would be, of course, assuming that white would just try

to pawn race it and not get its king into a better position. So letís go ahead, itís

white to move, white pushes pawn up, king moves and as you can see, the black king now

is going to be able to stop promotion and if it was just straight, if it was just a

straight pawn race to the end. So in this example here, if we go back, since it was

black to move and it was able to move into the highlighted square, whether it would have

been on the left hand side here or on the bottom, if it can get into this square, the

white pawn will not be able to make it to the end on its own and it will need the help

of the white king. Now in this example we have the white king here on A1, we have the

black king on C1 and a white pawn on H3, so the black king will be able to maintain basically

a buffer between the white king and reach this pawn. Now if you were in a chess match

and under time controls, you might actually take the time and calculate each move to see

how the pawn is going to do. Now letís assume for this example itís black to move. So letís

draw our square now, so we draw a diagonal up to the eighth rank and now we create the

box and we take it to the pawn and as you can see here itís a larger box than the last

example. And currently the black king, even though itís black to move, will not be able

to get into the highlighted area so the white pawn should be able to make it to the end

on its own. So letís go through it now and see. So black king moves here, white pawn,

king, pawn, king, pawn, king and as you can see, thereís nothing this black king is going

to be able to do to stop promotion. So letís switch things around here a little bit. Letís

move the white king up to A2 and the black king up to C2 and itís still black to move.

Now as a white player if you draw the square in your head and create the square to the

pawn, youíll be able to see in this position that the black king on his next move will

be able to infiltrate the highlighted square and should therefore be able to catch the

pawn. So letís go through it. Black king moves, white pawn and as you can see, the

black king is going to be able to stop the pawn and force the draw on this position.

So letís take a look at one more example if a few more pieces on the board here so

in this example letís say itís white to move. Now as a white player the first thing

that should be crossing your mind right now is a sacrifice to get the bishop off the table

to prevent the bishop from at any time hitting the G7 square. And so now in a normal match

if you werenít aware of this chess trick youíd probably just calculate everything

out. But we can see here white can take the bishop, king recaptures, so the king is going

to be on D2 and you can very quickly draw a square in your head while youíre playing

the match and youíll be able to see that thereís no way that the black king is going

to be able to stop this promotion. In fact, if we were to place the pawn on G3, like so,

the same thing will be hold true. So we can mentally think okay, queen takes bishop, king

takes bishop and then draw the square all the way up to the eighth rank and you can

see here that the king will be outside the highlighted area when that queen is recaptured

so the king shouldnít be able to do anything about it. So letís go through it here. White

queen takes, black king captures and here goes the pawn racing to the end and as you

can see, the pawn is going to get to the end and promote and thereís nothing black is

going to be able to do about it. So itís an interesting chess trick and it really does

cut down on a lot of time when youíre factoring in your pawn, king races at the end of the

match. And you might have one, two, three pieces of material left. If you see a kind

of a trade line, sacrifice line to clear the material right off the board you can quickly

calculate will your remaining pawn or whichever side of the board your pawn is on, you always

draw-, and actually Iím glad I thought about that. You always draw the diagonal the longest

diagonal. So if I, for example in this last position that we looked at, if this pawn were

to be on B3 instead I would draw my diagonal up to the eighth rank that way. So you always

pick the longest diagonal. But it doesnít matter where your pawn is positioned. This

will always hold true so itís a great chess trick providing, just as a reminder, providing

that the black king or white king if youíre playing black, canít get into that highlighted

area underneath the pawn or to the far side of the pawn. Once again, if itís on the right

hand side of this pawn or anywhere on the top rank here, the black king is going to

be able to capture unless itís way over here on A8. So it was an interesting trick and,

you know, I really wanted to keep this video up, but I wanted to clear things up from my

previous videos because I was drawing the boxes a little incorrectly before I was going

to the seventh rank. So take care, hope you enjoy the new video and weíll see you next

time.

The Description of Chess Trick #1: Quickly Calculating King vs. Pawn Movements