WEBVTT 00:01.560 --> 00:07.050 In this, actually, we're going to carry on looking at the legality or not of counting on either side 00:07.050 --> 00:07.620 of the board. 00:07.980 --> 00:15.870 Now, let's imagine let's just imagine that the opponents place this as we move on up here and they 00:15.870 --> 00:17.910 play this and we move our group back. 00:19.730 --> 00:27.540 And they can also now tell me, do you think white can cancel hair on the queen side? 00:28.070 --> 00:30.680 The king's not posing for a check, is it? 00:33.340 --> 00:38.620 We can't because we moved the book previously, if you remember, we moved the rook and we moved it 00:38.650 --> 00:38.840 back. 00:38.860 --> 00:39.650 We can't do this. 00:40.480 --> 00:41.340 This is illegal. 00:42.070 --> 00:45.730 And believe me, I programmed the chess rules on chess. 00:45.930 --> 00:47.770 So these chess rules. 00:47.770 --> 00:50.260 Yeah, there's a little program involved. 00:50.260 --> 00:51.250 You have to keep track. 00:51.250 --> 00:55.930 If the rooks moved, if the rooks moved on that side of the board, you can't control that side of the 00:55.930 --> 00:56.320 board. 00:56.710 --> 00:59.690 If the walls move on this side of the boat, you can't cross on that side of the board. 01:00.760 --> 01:02.230 So here's another example. 01:02.890 --> 01:06.340 Let's say we play age for play age five. 01:06.340 --> 01:07.390 We play ball games to. 01:09.530 --> 01:14.960 They kind of coincide, we play with each one, they play this, can we call Kingside? 01:17.010 --> 01:22.620 I hope your your your answer is no, no, because we've moved the rook with my drug. 01:22.670 --> 01:26.460 We can't just move right back and expect to be able to console that side of the board. 01:27.560 --> 01:32.530 So when you're playing casually in the real world, you have to enforce these rules with your opponents. 01:33.530 --> 01:36.910 But when you're playing online, usually it's enforced by the chess software. 01:37.610 --> 01:39.920 It would just stop you from doing that move. 01:40.730 --> 01:47.120 So sometimes people lose track if they move the right before software keeps track of that won't let 01:47.120 --> 01:47.840 you Castle. 01:48.860 --> 01:51.650 And this is a brand new site full of bugs in the software. 01:51.650 --> 01:52.580 That's a different story. 01:53.780 --> 02:00.560 OK, so if the works both Previously on that particular side of the ball, then you can't cancel that 02:00.560 --> 02:01.310 side of the board. 02:03.290 --> 02:06.500 And also, let's extend this now with another role. 02:08.060 --> 02:15.710 So say we move on to a two day council, we move rocking back and they play this sake of argument. 02:16.310 --> 02:17.890 Can we cancel anywhere? 02:18.320 --> 02:19.190 Can we consequence? 02:19.190 --> 02:19.490 Are look. 02:23.180 --> 02:23.810 Well, we can't. 02:23.820 --> 02:26.100 KOSAK, Queensland on two accounts. 02:26.120 --> 02:28.100 I will be moving through check. 02:28.460 --> 02:30.580 And B, we've already moved our king anyway. 02:30.650 --> 02:35.300 So actually on two counts, it's illegal and we can't cancel Kingside either. 02:35.540 --> 02:39.260 We can't cancel Kingsly that we've just moved our king and moved it back. 02:39.620 --> 02:40.820 We can't cancel now. 02:41.210 --> 02:50.090 We've we are said to have lost our castling rights, we've forfeited our rights and sometimes Plasencia 02:50.090 --> 02:57.140 has played some very exciting gambits and sacrifice to get the opponent to move their king before castling, 02:57.140 --> 03:00.650 to remove the opponent's right to counsel. 03:01.250 --> 03:07.760 So cancelling is generally a right, but it can be forfeited in general if you've moved one of the risks 03:07.760 --> 03:13.310 involved in casting on that particular side of the board queen side, Kingside, or you've moved the 03:13.310 --> 03:14.120 king previously. 03:15.080 --> 03:16.820 Yes, and this stuff is hard to program. 03:16.820 --> 03:21.610 If you ever get into programming for chess, it's hard to program to keep track of. 03:22.370 --> 03:24.800 So anyway, so there's castling. 03:25.730 --> 03:27.170 Some extra rules to think about. 03:30.910 --> 03:32.830 OK, thanks so much.