WEBVTT 00:00.930 --> 00:01.580 Hi there. 00:02.070 --> 00:08.180 Continuing our theme of the back bromates, we see that there's a sort of like theoretical downside. 00:08.190 --> 00:13.440 The king hasn't got too many squares the king is not able to get to. 00:14.070 --> 00:16.650 It seems blocked in by age 22. 00:16.650 --> 00:18.870 So even though it's not --'s, it's still blocked in. 00:19.560 --> 00:27.380 And the opponent here, this is from a game constant Auburn against has Kramer, an opponent here, 00:27.390 --> 00:31.820 played Bishop takes E5 not suspecting anything was up. 00:32.250 --> 00:34.500 Now, if I give you five seconds, pause the video. 00:34.500 --> 00:36.620 Can you spot a backroad? 00:36.630 --> 00:37.470 Checkmate. 00:39.630 --> 00:42.270 And there's also another little lesson here as well. 00:42.270 --> 00:46.050 I'm going to talk about that, which is very important in chess. 00:48.210 --> 00:54.680 OK, I hope you spotted it for a thousand points, there is actually a chat here, believe it or not, 00:56.460 --> 00:58.650 it looks as though the bishops covering AF1. 00:58.650 --> 01:00.360 So it looks as though you can't play this. 01:01.020 --> 01:02.660 But is that really the case? 01:04.420 --> 01:10.210 Isn't this checkmate because the bishop is Penns to the king? 01:10.990 --> 01:11.800 This is a pen. 01:12.070 --> 01:14.920 This is called a tactical pen. 01:14.920 --> 01:19.830 When something is pinned to the king, if it's pinned to the king, it's an absolute pen. 01:19.840 --> 01:24.980 And in fact, there's an expression in chess the power of the pen piece is illusionary. 01:25.360 --> 01:31.660 So, in fact, whenever you see a piece pinned to the opponent's king like this, you've got to imagine 01:31.660 --> 01:33.790 as though it's an illusion. 01:33.790 --> 01:37.780 It's not really controlling these squares. 01:38.650 --> 01:43.750 It's only controlling this square where it's not Pendle on that line, but it can't go. 01:43.750 --> 01:48.420 It's an illusion that it has control over a train, EF1, these are illusions. 01:48.970 --> 01:55.580 So in fact, we're proving the downside here of why its position by playing rock. 01:55.580 --> 01:58.660 Have one check and mate, it's checkmate. 01:59.800 --> 02:00.660 The Misspend. 02:01.300 --> 02:03.930 So this is another back from my example. 02:04.450 --> 02:04.900 Yeah. 02:04.960 --> 02:12.400 The back room is a frequent visitor for winning games of chess, so that's why it's so important as 02:12.400 --> 02:13.900 your first mating pattern. 02:14.530 --> 02:17.260 So be able to master these examples. 02:18.070 --> 02:25.180 And again, the principle is in any given position, we really do need to check all our checks, our 02:25.180 --> 02:28.210 captures and our threats of one. 02:28.210 --> 02:34.930 And so basically the high priority forcing moves which will limit the opponent's replies when we calculate 02:35.260 --> 02:37.660 so-called calculate moves in advance. 02:38.440 --> 02:43.030 Kasparov was annoyingly, you know, kept ask the question how many moves ahead you calculate? 02:43.570 --> 02:46.510 And, you know, he did say, you know, it depends on the position. 02:46.510 --> 02:49.900 Some positions you can calculate very far and ahead because there's not too many choices. 02:50.260 --> 02:52.960 Bobby Fischer, the American chess legend, said the same. 02:52.960 --> 02:57.130 You know, sometimes you don't have to calculate all these different choices for the opponent. 02:57.340 --> 02:59.560 So it makes it easy to calculate many moves ahead. 03:00.220 --> 03:08.470 Your duty when you see a chess position is to at least calculate the essential forcing move variations, 03:08.470 --> 03:13.840 the ones where there were very limited replies just in case you can win by force. 03:14.230 --> 03:18.750 So yeah, here Rook have one is much stronger now. 03:18.820 --> 03:20.650 It's checkmate is much stronger than taking here. 03:20.950 --> 03:27.400 So sometimes the more subtle moves when you the games, the unexpected, the tales of the unexpected. 03:27.700 --> 03:31.960 So Rook, if one is checkmate here, I hope you enjoyed this one and found that. 03:33.230 --> 03:33.860 And so much.