Hi there.
In this lecture, we see Anatoly Karpov playing against Enver Bookish in 1978, began the tournament
around 14.
So for from Karpov we have a book Hitch playing C five, we have a3d6 default C text Default 1964 Nice
f69c386.
So the Sicilian knight off we have Bishop E, two and E five might be free.
Bishop e seven both sides castle and our preventative move A four to prevent b59c6 King H one.
We have Bishop E, six and F four.
We have Knights b4 and now Karpov commits to F five, Bishop D seven and we can see that D five is important
potentially for black liberating the position here.
For example, this Bishop's locked in right now in the pawn chain we see Bishop G five.
So here is a kind of preventive move.
Bishop G five So Bishop C six is played.
So there's a war with the D five square ongoing war here.
If D five was played immediately in this situation, Bishop takes off six, Bishop takes off six, E
takes D five.
Doesn't seem to carry any controversy with it.
White is just simply better and has just won a pawn.
But let's keep a view on this idea of D five as a pawn break.
We have Bishop C six, Bishop F3 again, kind of preventing the five firmly rook st Queen E two So for
the moment temporarily taking an eye off D five but Rook could replace the Queen on D one We have h
six if d five here.
This is slightly different already because.
We we can we can play Bishop takes f6 but there's D takes E four in this situation.
And if Bishop takes E for Bishop takes F six.
This situation, for example, is only a small edge for white, but definitely a small edge.
So H six is played.
We have Bishop h4b6 Rock 51, Queen C seven, and now we see Bishop G three.
This is an interesting move if G four that in fact with the king on H one and the bishop kind of X-raying
the king, it actually is dangerous for black Lady five in this situation.
So Bishop takes F six here, D takes E four as example, 984, G takes F six.
And this situation is going to be unpleasant for white after 95, nine, G three for Queenie.
Free Bishop takes her free queen takes her free eight Black is actually better overall here so you can
see how things can go badly wrong.
So yes, D five as a break here is very interesting.
And there's also tactical ideas on it's D five in this situation, like nine takes D five hits the H
for bishop.
So if it takes D five.
1965 that h for Bishop is here.
So Bishop takes here.
Black could just take on h four or take on C six first.
But this isn't going to be great for white.
So Bishop takes H four here.
Isn't great for white either.
Okay, so interesting position.
And the C file is obviously a concern for white as well.
So in a nutshell G4 be very, very risky here to play.
G4 is very, very weakening.
So Bishop G.
G3 is played now.
Bishop B seven.
If we test D five in this position, we can just take here and there's no problem.
We can take on D five, no problem.
We can say on D five this is no problem.
Planck doesn't have enough play here to justify losing material in that manner.
So Bishop B seven is played rook DD two rook and now strengthening the grip on D five.
So there's a lot of prevention, but it's active surveillance.
You could call this just active surveillance of the D five square.
There isn't a lock and key on it yet, so that is a bit riskier than lock and key.
If it was absolutely blockaded, then we can firmly say D five is impossible.
We see 98 and actually this introduces a France Bishop G five which is exposing the awkwardness of the
rook hasn't got D frame, so we have h four preventing g five but it could also be used for an attack
later if the G four moves later with g4g5.
So we have.
Yeah, it's an interesting situation just to show if H three Bishop G five what does might do is difficult.
One's going to lose the exchange.
So H four we have no it's f six the knight going back.
Bishop F two and then we have Knight D seven here.
If we look at rookie eight, it's an interesting position again, you know G four there is actually
D five here.
If E takes E four, this actually leads to a situation where it's only going to be a small edge for
one.
It's funny enough because this situation Queen C two Black does actually have a little bit of play to
contain White's advantage in material.
This this is an interesting situation for Black and if D five straight off the bat E takes again here
it's not quite so good.
Knight takes E four and Bishop G three is a pain for black in this position.
So this situation Knight takes F six check.
Rook takes the check, Rook takes the check.
Queenie Bishop takes B seven, Bishop takes F four.
You can see that's not a good outcome for black to play D five immediately.
So anyway, 97 we have G three, King G one might be a little bit more solid actually with a small edge,
but G Free was played King F eight Knight C one We have Queen C four, Queen E one and our Queen seven.
In fact, Black could have played the B five pawn move because I mean, this actually had to be played.
It seems this takes eight takes King H two There's 19 C two here as a little trick, 4b4 and White would
have to kind of bail out it seems for a draw otherwise blacks just out.
So a draw by continually attacking the queen may be could be the result if if queen before there's rook
be free skewering the queen and bishop so you know be a draw there.
So that is a really interesting possibility.
B five it seems to be, you know, an important player, but Queen C seven we have Queen G one now.
So looking at B six, seemingly trying to tie down Black 95 Knight one to E two we have Bishop C six
and they'll be free.
It seems here as though G four might be actually more accurate.
So Knight takes a four, taking on a four, Bishop takes a four, B three, Bishop C six and then G
five.
The attack potential is actually okay here and we can take out B six and G takes six.
We don't need to take on the eight.
We can go for the King as a priority with f six Bishop takes up six knight G three.
So the priority would be to get a king attack with Bishop C five being instrumental.
So forget trying to win the exchange.
This situation is very dangerous.
With Black's king, for example, here there's a raging attack.
The king's now back in the center.
And this is a strong attack potential where one should end up being significantly better.
Well, E five is crushing.
So, yes, that sort of thing is amazing.
So G four does seem actually a logical move, but be free safeguarding a four.
We have Queen B seven.
So letting black amplify the D five threat again.
So black has many pieces trying to get in d51 de queen G two again restricting preventing D five.
Queen C seven Yeah.
D five is certainly if we test D five here.
Certainly the active surveillance is stronger if E four is a little track 1984, this doesn't really
help black on this occasion.
So 1965 and we're just scooping up material.
Bishop Take five.
Bishop takes the file.
We're just winning material.
So.
Quincy seven.
Bishop E three.
We have Bishop F six, King H two, Queen E seven.
Queen F two.
Bishop B seven.
Bishop G two.
Here it seems as though King H three was more appropriate supporting H four, which means that G four
can be played, which means that there's an incoming G five potential.
So here Queen G three for G five is actually dangerous.
If Black has to resort to G five himself, then this situation is going to be in White's favor.
So anyway, Bishop G.
Two was played Don't King G eight, Queen F3, King seven, Queen H five.
And Karpov is a little bit asking for trouble here.
The Queen is a tempo gainer on H five.
If a knight was on F six, the knight would not just be hitting the Queen, but it would also be supporting
the D five break.
Just imagine that possibility.
So Queen for eight we have rook f one in this situation.
Now if g for g six and that kind of embarrasses the queen.
If queen takes h six, this is no good because g five check black has bishop takes and blacks can stand
much better there.
So Rook have one.
We have 97 and that scenario of 9f6 for ad5 is coming up rook c one and
annotators past annotators without strong engines might suggest that this was a critical mistake, and
as if black could just equalize, Black can actually do better than Rook six.
This is a disaster of a move.
It's an instructive disaster move.
It actually turns White's active surveillance of the D five square into what Nimzowitsch would call
lock and key.
You know, when Nimzowitsch was talking about past pawns, we can also relate that to strategic pawn
breaks.
We can have strategic pawn breaks under active surveillance, but a lock and key would be a blockade.
Just like a blockade.
We have a lock and key for a past pawn.
So Nimzowitsch was saying criminals are like criminal past pawns, like criminals that need to be kept
under lock and key access.
Surveillance isn't enough in this situation, it turns out.
Bishop is seven.
Funny enough because of the Great Queen.
On H five this night.
F six is really a strong idea.
The Queen will have to go back if g for here splat Knight of six traps the Queen.
So let's say the Queen goes back and look at this position.
If the queen's on free, that's no good for relationship to the defined break d five here and Black's
liberated.
This might make you feel better.
It makes me feel a bit better that sometimes I try and play positioning like Karpov against Sicilian
knight offs and horrible things happen.
This would be a horrible thing happen happening.
He takes DD five here.
There's my six temporary pawn sac.
And you might think, What is this nonsense?
What does White do?
Black's going to get this pawn back now.
Black's got a lot of firepower on this --.
One, two, three, four.
We can take on basics.
Sure.
But then rook six and it's a positional kind of -- sacrifice.
Now, let's examine Bishop.
Gee, one head might be 65.
And look at this position emerging.
This is just going to be better for black.
Or if if C four here, you know, it's just going to be in a much better position.
So it does turn out that Bishop e seven is actually rather strong.
It's this battle of the D five break.
Yeah, it's just a strong position for black.
So this is actually a total disaster.
Move.
Rookie sex, Total disaster.
Move till we get this locking key, so to speak.
90 5d6 is now like a criminal kept under lock and key.
That pawn break has gone.
It's just not a legal move.
That's.
That is prevention.
When something isn't a legal move, then we can say it's under lock and key.
So we have now a crushing possession and white can get on with things without worrying about the day
five break.
Finally, the queen actually from not being justified from being a tempo gainer is great on H five now
after Black's disaster move, why is now threatening with tempo nine takes?
F six sometimes.
Sometimes.
But also, you know, hitting this night, that's that's the key thing because this night's actually
protecting F six.
But the key thing is it takes P four as a threat.
And what is black do about that?
Well, Black takes on day five.
So we have this lock and key now over the DD six pawn.
And now.
Bishop E4.
Lock and key over the e pawn as well.
That's legally blockade.
It's illegal for black to play E4.
It's not a legal move.
That's the way to stop that.
Otherwise, if Black gets to play F1, it's a bit of a life in the position.
So Bishop e for here this locking key business is powerful.
95 that's just taken.
Rook, take five.
It doesn't matter about giving up a bishop for a knight.
If the lock and key can be held over the e pawn and the d pawn.
And now g four.
And here black resigns.
It is a crushing attack without any counterplay.
So, yes, prevention.
Let's distinguish prevention here.
Active surveillance versus lock and key locking keys to be preferred if King hag5.
This position we have lots of attacking options.
We don't even have to rush with f6.
We can play rook f one get black to weaken the g six square.
And in this position, for example, we can install a rook on G six and this is just crushing stuff,
this position.
It doesn't matter if we lose the exchange here.
And we're going to play things like 9 to 5 G seven soon as well as Queen E free.
We can build up if black takes.
This is just all over.
G seven is coming now.
Black would have to give up the queen.
So it's it's a fascinating game.
It's a start of discussion.
In this game.
It looked as though conference play was entirely appropriate.
But there are certain slight subtle downsides of the way Karpov played it with the Queen on H five.
It really is a battle of the D five break this game and it shows that sometimes we don't want to offer
tempo.
Gaining moves to your opponent.
Yeah, Before the disaster.
Roxy six.
It is a situation where Bishop e seven and Black's actually doing really well.
Black needs to play dynamically This idea of having to protect the B six pawn.
Black has to play dynamically.
And you know, it's funny that in a Karpov Kasparov world Championship match game, Karpov lost on the
white side of Sicilian winning B six pawn, but somehow generate a lot of counterplay with the black
side.
So I think that has to be a conscious option that sometimes you do have to sacrifice a pawn to be able
to liberate the position that liberation will D5 break.
It's a fascinating game with opportunities sometimes for black, especially towards the end.
Yeah, it's funny one.
So yeah, for me the big lesson here.
Be a bit cynical about active surveillance.
If you're not legally preventing a certain move, you've always got to watch out for it.
And there's going to be situations you might actually be inadvertently enhancing a certain pawn break
if you give tempo gainers like a queen, which might be subject to attack.
So fascinating stuff.
I hope you enjoyed this discussion and example game hens too much.