WEBVTT 00:01.190 --> 00:10.520 Either in this position along to show you the Vancouver position, this is a way for black to draw. 00:10.730 --> 00:17.620 So if white plays king, see five black guys check and see how black keeps the checks going here. 00:18.530 --> 00:23.000 And for example, this position keep the charts going. 00:23.450 --> 00:28.460 But here we keep in contact with that pawn. 00:28.460 --> 00:30.460 And this is the best play. 00:30.470 --> 00:32.020 It's impossible for whites to win. 00:32.570 --> 00:39.710 So it's been studied by Frank Hura and it's actually impossible to win if we play recaps. 00:40.010 --> 00:41.330 If we didn't play recaps, thanks. 00:41.360 --> 00:42.440 We played against one. 00:42.620 --> 00:52.730 This actually loses, for example, Czech and then here and then the pawn is making progress. 00:53.570 --> 00:57.170 We're essentially going to lose this position, for example. 00:57.920 --> 01:02.150 Eventually we're going to lose you know, they're going to build a bridge here and queen that poem. 01:02.750 --> 01:06.080 So you make contact, you keep contact with that pawn. 01:06.680 --> 01:12.320 And in this particular position, it should be just a draw if a seven Roquet six. 01:16.440 --> 01:25.050 So you get behind that poem, you stop any tracks like Rukia Check and queening, so if you if you played, 01:26.010 --> 01:26.880 for example. 01:30.060 --> 01:33.480 King f7 the went playing eight track and then Queen. 01:35.780 --> 01:44.740 So you get behind the -- immediately, so the -- star on seven and here it's impossible for one 01:44.750 --> 01:52.340 to use any trick when the king is crucially on G7 here it can be sometimes on eight, seven as well. 01:52.730 --> 02:00.500 But if it's on F7, then they would have a trick in room eight because then if you imagine taking the 02:00.500 --> 02:01.190 -- they got. 02:03.450 --> 02:05.670 Rule seven, winning the rook after. 02:09.300 --> 02:14.090 And so the king is crucially in the vanguard position on G-7. 02:16.220 --> 02:17.130 Or H7. 02:17.540 --> 02:19.340 That's the crucial bit as well to remember. 02:21.540 --> 02:28.590 So here in this position, if kinky sex, we just carry on the checks and why it's not able to make 02:28.590 --> 02:29.120 progress. 02:29.550 --> 02:34.470 So if you can get to the bank position, if you are playing black and they had a rook's --, you want 02:34.470 --> 02:37.200 you king on the other side of the board. 02:38.830 --> 02:43.940 So just to make that a little bit clearer, say say you're black, you're black and you're king wasn't 02:43.950 --> 02:45.150 on the other side of the board. 02:46.410 --> 02:47.730 So we reached this position. 02:53.230 --> 03:03.460 Well, here we have Brooke one, and thankfully they haven't got any tricky rock move to say say we 03:03.460 --> 03:11.950 did blunder with all king like here, Brooke, FHA doesn't work or looks able to, you know, take on 03:11.950 --> 03:12.510 the poem. 03:13.090 --> 03:15.910 But if I King was on F7, they'd have eight. 03:18.050 --> 03:20.970 And then the point is, you know, had they had that, they will track. 03:21.590 --> 03:28.730 So basically we're talking about from the black perspective sometimes when defending against the ponies 03:28.730 --> 03:29.570 Rook's poem. 03:31.720 --> 03:39.430 You need your king on this side of the board so that rook track is not working and you have to make 03:39.430 --> 03:44.620 sure that you maintain either like perpetual checks. 03:46.640 --> 03:49.590 Or an attack against the --. 03:49.940 --> 03:54.170 So here, for example, would have sex. 03:57.370 --> 04:01.300 So you don't really count if a seven, you're going to get behind that --, there's no tricks for 04:01.300 --> 04:01.660 whites. 04:07.200 --> 04:13.110 Here, it's it's just a draw, so the Vancouver position is very, very important to know about defending 04:13.110 --> 04:15.960 against a Ruxpin, I hope. 04:17.470 --> 04:20.480 That's kind of illustrating the concept a little bit. 04:21.220 --> 04:26.050 It's an important position to know about for drawing against Aerospatiale. 04:26.080 --> 04:28.950 Kheng, crucially, has to be on the other side of the board. 04:29.680 --> 04:35.680 You have to sometimes use perpetual checks and sometimes you have to keep contact with with whom you're 04:35.680 --> 04:38.980 trying to encourage a position like this where it's committed. 04:38.980 --> 04:45.130 And then you got a perpetual check situation without any tricks from whites to win your rook because 04:45.130 --> 04:51.510 your king's here or hair and your rook's ready to catch the form if there's any check. 04:52.600 --> 05:00.190 So you're behind pawn in this one once the pawn is on some Frank, OK, and so much.