WEBVTT 00:01.260 --> 00:01.950 Hi there. 00:02.180 --> 00:11.270 In this lecture, we see two feed masters battle out Bruce Harper against Robert Zook in 1971. 00:12.590 --> 00:16.580 This is the Halloween open tournament. 00:16.670 --> 00:20.870 So we see the fall from Bruce Harper. 00:20.900 --> 00:22.590 Robert Zook plays nine of six. 00:22.610 --> 00:24.500 We get a Kings engine defense. 00:24.800 --> 00:28.250 Let's actually go past the opening phase. 00:28.250 --> 00:34.790 So it's a typical King's engine defense position Classical Kings engine variation. 00:35.150 --> 00:37.550 So noise H five, C one, C five. 00:37.580 --> 00:43.280 So Black is closing up the queenside before proceeding on the kingside. 00:43.310 --> 00:46.650 That's a useful strategy to bear in mind sometimes. 00:46.670 --> 00:48.170 Geoffrey might have six. 00:48.770 --> 00:56.800 So this knight goes back rather than playing F5 because this could be a targeted liability on H5. 00:56.810 --> 01:04.070 So we see Knight have sex A4 9891 and now F5 8/10. 01:04.130 --> 01:14.510 Knight takes F5, Bishop F3 Be6 Bishop G2, Knight D4 f4 Bishop at five F takes E5. 01:14.810 --> 01:15.980 Bishop takes E5. 01:15.980 --> 01:17.030 Bishop h6. 01:18.350 --> 01:19.610 Bishop G7. 01:20.090 --> 01:23.240 So Bishop 67 nine 6793. 01:23.750 --> 01:27.230 Okay, so here where it move 21 we're into the middle game. 01:27.620 --> 01:31.500 If F3 had been played there is an annoying ping. 01:31.520 --> 01:38.750 Pen Bishop G4 Queen D3 Black could just take on a free to leave that very strong good looking knight 01:38.750 --> 01:39.950 on D4. 01:40.310 --> 01:44.180 Black has a small edge here, but okay. 01:44.180 --> 01:45.260 Knight defray. 01:45.290 --> 01:46.460 We have Queen G5. 01:46.490 --> 01:51.770 This does permit Queen G5 my A4 Rook ain't Queen A4. 01:51.800 --> 01:54.650 This is an excursion from win material, it seems. 01:54.830 --> 01:56.930 Queen A7 Protecting A7. 01:57.530 --> 01:58.820 Knight B5. 02:00.000 --> 02:08.360 If one does play Rook F1 Black could actually just take that and two rooks for the Queen with Rooks 02:08.370 --> 02:08.650 one. 02:08.670 --> 02:12.030 Black overall was better in this particular position. 02:13.320 --> 02:15.360 The knight on D4 is very strong. 02:15.390 --> 02:20.970 There's good coordination of the pieces coming up, so that's not to be entertained. 02:20.970 --> 02:32.160 So we have Knight B5, Knight takes me five, Queen Slingsby five Queen E Forecheck 1g5 Knight Free 02:32.850 --> 02:36.210 Bishop RD Free pair of books Come off. 02:37.040 --> 02:38.060 Brooke, She won. 02:38.600 --> 02:39.560 So it looks as though. 02:39.560 --> 02:40.370 Hold on. 02:41.240 --> 02:43.760 Isn't my gang kind of passive here? 02:43.970 --> 02:45.290 That's the case. 02:45.560 --> 02:55.190 If Rook one Bishop e4 is quite a nasty pen, and it looks actually quite a terminal pen here. 02:55.700 --> 03:04.850 So, for example, Queen D7 Black could take on G2, King Tanky two, Queen E, four Jack, Queen D, 03:05.120 --> 03:06.980 Jack and Queen. 03:06.980 --> 03:11.000 Thanks B to is giving Black a fantastic game. 03:12.050 --> 03:22.100 So this position is very dangerous for white indeed if for example nine six G5 nudging the knight and 03:22.100 --> 03:28.100 then we're going in this this key check which gets a very nasty pen and then rook F1 is checkmate. 03:28.130 --> 03:29.900 So, yeah, there are some dangers here. 03:29.900 --> 03:33.560 So why kind of went close to the king with Rook? 03:33.560 --> 03:34.340 G1. 03:35.270 --> 03:38.870 But then we do have this nasty pen here Bishop e4. 03:39.470 --> 03:41.540 So pin and win is an expression. 03:42.860 --> 03:47.390 So do we always need to checkmate When we have these pens? 03:48.200 --> 03:53.840 We have absolute pens to the king sometimes as part of attacking chess. 03:54.200 --> 03:57.890 And no, actually, you don't always need to checkmate. 03:57.920 --> 04:04.310 It creates immobility in the opponent's position, kind of paralysis, almost as if the opponent's going 04:04.310 --> 04:07.550 to run out of moves potentially, if you pin enough things. 04:07.850 --> 04:09.020 So here. 04:10.020 --> 04:10.470 Yeah. 04:10.470 --> 04:11.940 In this situation. 04:14.040 --> 04:17.100 Bishop takes G2 check is played. 04:17.280 --> 04:19.710 And you might think, well, that's a relief for whites. 04:20.610 --> 04:26.130 Now, if the king takes we're either playing queen, a free checkmate or queen E4 is checkmate. 04:26.460 --> 04:35.400 So the rook takes, but we all get to a new pin now Queen E4 and it is associated with a concrete France 04:35.610 --> 04:36.990 of rook one. 04:37.680 --> 04:38.970 There's no G one, though. 04:39.300 --> 04:46.830 So White plays nine g1 straight off the bat and no H six white now plays H four. 04:46.860 --> 04:54.530 It should be noted here with H for that White is actually threatening to unpin the G2. 04:54.540 --> 04:57.030 Rook White's given a resource King H two. 04:57.060 --> 04:59.520 With this vacating move of H two. 05:00.060 --> 05:04.500 So that's why it's important not to rest on their laurels here. 05:04.800 --> 05:06.960 So for example, if G4. 05:08.130 --> 05:09.330 Just to try and cut off the queen. 05:09.330 --> 05:15.540 The thing is, King H to underpins the rook and we could get a small edge here, but we've just let 05:15.540 --> 05:18.300 White's position become lively. 05:19.230 --> 05:20.190 We've only got a small edge. 05:20.190 --> 05:28.380 So it's very important here to recognise this square vocation creates resources through square vacating. 05:28.710 --> 05:29.790 And what is that resource? 05:29.790 --> 05:33.420 It's lumpen resource, so it needs to be shot down. 05:33.420 --> 05:35.190 So Rook have to is played. 05:37.040 --> 05:43.760 Stopping The immediate king aims to cause the Queen 62 meets the queen comes back and then taking out 05:43.760 --> 05:47.840 the H two square so white cannot unpin. 05:48.170 --> 05:55.520 So yes, if you're going to play this particular perk of attacking chess to immobilize pieces, the 05:55.520 --> 05:57.440 frets you're looking out for. 05:58.340 --> 05:59.960 On pinning frets. 06:00.140 --> 06:02.540 If you can stop the opponent on pinning. 06:02.630 --> 06:09.380 Then you create a true masterpiece like this and they are locking everything up with age five. 06:09.950 --> 06:12.500 Do we even need my hair? 06:12.740 --> 06:13.970 That's the question. 06:16.380 --> 06:17.820 Once peace is. 06:19.670 --> 06:21.080 Ah, absolutely. 06:21.860 --> 06:24.530 You know, it's terrible looking here. 06:27.590 --> 06:30.200 And we see the move. 06:32.400 --> 06:33.510 Before. 06:37.600 --> 06:41.680 Och and now Rook have won. 06:41.680 --> 06:45.640 So we've actually got two absolute pins to the king. 06:45.640 --> 06:51.910 And this is one of the, in fact, one of the beautiful benefits of attacking chess. 06:51.940 --> 06:59.860 If you can expose the opponent's king, you do sometimes get these absolute pins which can be complete 06:59.860 --> 07:02.590 torture in their own right. 07:02.590 --> 07:08.380 And what is without any decent moves here, Wayne's been run out of moves. 07:09.550 --> 07:15.430 There is one legal move available, of course, Queen free, but won't place for the moment. 07:15.430 --> 07:16.300 Be five. 07:16.300 --> 07:19.150 And now guess what Black does. 07:22.830 --> 07:26.100 Plank just just plays a waiting move. 07:26.670 --> 07:27.600 What is White doing? 07:27.600 --> 07:28.770 We don't need checkmate. 07:28.770 --> 07:34.110 We've got these absolute pins which are kind of winning in their own right because y is without any 07:34.110 --> 07:34.560 moves. 07:34.560 --> 07:38.970 Y it plays a four king h7a5, and now just King G eight. 07:38.970 --> 07:43.770 And now White resigned if eight tanks, B six, eight, B six. 07:43.770 --> 07:46.950 Unfortunately for why it's not a stalemate. 07:52.940 --> 07:53.090 Okay. 07:53.270 --> 07:54.770 This is one of the funny games. 07:54.770 --> 07:59.300 You know, it's not famous players or anything, but it is kind of a memorable game because of this 07:59.300 --> 07:59.900 position. 07:59.900 --> 08:05.270 You know, it's good that, you know, lesser known players can create absolutely memorable games, 08:05.270 --> 08:07.250 but the absolute pin's here. 08:07.250 --> 08:13.130 Yeah, you can see that sometimes you just don't need a checkmate you're attacking without even needing 08:13.130 --> 08:13.580 to checkmate. 08:13.580 --> 08:15.890 The absolute pins are worth their weight in gold. 08:15.890 --> 08:16.720 So Quinn H. 08:16.730 --> 08:18.010 Freed would have to be played here. 08:18.020 --> 08:18.230 Right? 08:18.230 --> 08:19.580 It's the only legal move. 08:20.210 --> 08:21.440 What else does White do? 08:22.280 --> 08:25.580 And then we just take hair and then we mate. 08:27.830 --> 08:32.120 So, yes, there is a lesson here in this game. 08:32.390 --> 08:33.560 Skipping the opening. 08:33.880 --> 08:35.510 Let's go to this position. 08:38.070 --> 08:44.910 It didn't seem that bad here, but somehow White got into these tremendously bad pens. 08:44.940 --> 08:48.600 It seems as I had a mini success there, getting rid of a central piece. 08:49.110 --> 08:53.160 But yeah, it seems as though there's a lurking light square issue. 08:53.880 --> 08:58.380 There's a responsibility in the light squares and the queens kind of in Siberia right now. 08:58.410 --> 09:01.980 You could see say it's away from the king. 09:02.400 --> 09:08.310 And so Black's attacking potential here was actually rather good. 09:08.520 --> 09:14.310 So especially this position, this queen is actually, it seems a lot more functional than than the 09:14.310 --> 09:15.600 counterpart queen. 09:15.810 --> 09:19.530 So, yeah, this position just went very badly downhill. 09:19.560 --> 09:23.700 The problem is, you know, White doesn't even have a check on E6 because this night. 09:23.910 --> 09:26.760 So, yeah, going into these very, very nasty pens. 09:29.560 --> 09:34.100 And if the light took those rock f one chap mates. 09:34.120 --> 09:41.740 So the I had to stick around and you know, already it's kind of evident that, you know, one can't 09:41.740 --> 09:46.030 really do anything because of this rock, have two friends. 09:46.360 --> 09:51.490 So yeah, if it had gone immediately to H free. 09:53.270 --> 09:55.440 It still looks absolutely diabolical. 09:55.480 --> 10:02.750 G4 for example, and we're nudging the Queen away from G2 and then Rook half two And then what happens? 10:02.870 --> 10:04.530 How is G2 protected? 10:04.550 --> 10:05.100 So yeah. 10:05.120 --> 10:06.230 White Try to 10:08.900 --> 10:11.660 do something about G2 like this. 10:12.230 --> 10:18.080 But yeah, this is a little bit sadistic, just enclosing white pieces like this and just using the 10:18.080 --> 10:19.880 zugzwang option. 10:20.000 --> 10:23.710 But yeah, it's something, it's an extreme example. 10:23.720 --> 10:31.430 It definitely is an extreme example of the power of just locking up the opponent's pieces through absolute 10:31.430 --> 10:31.850 pens. 10:31.850 --> 10:37.730 So bear this in mind as one of the great little perks of. 10:38.460 --> 10:39.690 That's hacking chess. 10:39.960 --> 10:40.720 Okay. 10:41.040 --> 10:41.790 And so much.