When to Capture or exchange
	when should we make captures
	we give values to various pieces, but we always have to think of their mobility
	a piece that can't move very much is not strong
	your own pieces are usually the problem
1						2
	how valuable is the white pawn
3						4
	if white could move the Knight to e7, without
	having the black King trapped in h8 which would
	be a stalemate, white will win
5						6
							white 'sees' the possibility of Ne7 +
notes
	when should we make captures or exchange material ?
		only when it suits us
		only when the value of the exchange is right
		values of all the pieces change during the game - capturing a piece which saves the game
		is very important
1
2
	mate with a Knight and Bishop (with the King's help, can be forced but very hard (in unfavourable
	positions can take up to 34 correct moves)
	so taking the pawn
3
	3.Nc7 Kh8 4.Nd5 Kg8 5.Ne7+ Kf8 6.Kh7 Kxe7 7.g7 Kf6 8.g8Q and it turns into a BASIC mate
	though there is a forced mate-in-6 moves
	3.Kg5 Kh8 4.g7+ Kh7 5.Kf6 Kg8 6.Ke7 Kh7 7.Kf7 Kh6 8.g8Q Kh5 9.Qg5# checkmate
4
	1...Qxg6+ 2.Kxg6 Kg8 3.Nf5 Kh8 4.Kf6 Kg8 5.Ke7 Kh8 6.Kf8 Kh7 ….
	note that checkmate with just the 2 knights cannot be forced so it is OK to capture the pawn
5
&
6
	33.Rxd4 a sacrifice - white saw the value of the Knight check after the recapture cxd4
	34.Ne7+ this is the correct way to play, since 34 Qxc8 ..Qxc8 35 Nxc8 + seems the same
	but in fact the difference is that in this variation black's d-pawn can Queen safely (and so black would win)
	but in what was played, white can capture that pawn and his better pawns (probable 2 passed pawns will force the win
	Qxe7 35.Qxc8+ Qf8 36.Qxf8+ Kxf8 1-0