# 5/18/2012 - Mate in 4

• 19 months ago · Quote · #81
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• 19 months ago · Quote · #82

First!..... Well in my house. :)  This one looked like it would be easy but I struggled.  Got it though.

• 19 months ago · Quote · #83
walidwd wrote:

what about Bc2 at the frist move to force the black bishop to move or kill it ?!! plz someone answer me plz !!!

1. Bd1 is necessary for the mate in four because it covers the g4 and h5 squares.

• 19 months ago · Quote · #84
[COMMENT DELETED]
• 19 months ago · Quote · #85

Easy. All forced moves!

• 19 months ago · Quote · #86

Second Night Sleepless In Reykjavik, l'ISLANDE. 1.Bd1 Bg6 2.Rg4+ Kh5 3.R4xg6+ Kh4 4.Rxh7+#  Hello! More Nice Is 4.Rh6+# OK  Confused In Brainfog. Easeland Want, For The Sake Of Beauty, To Sacriface A Rook For One Bishop Mitre On Square g6: 2.R3xg6 hxg6 3.Rxg6... Intending 4.g3+ Kh3 5.Bg4+# I Am Lost In A Fog. Thank You Anyway, chess.com  Auf Wiedersehen

• 19 months ago · Quote · #87

• 19 months ago · Quote · #88

Of course it is better to take a pawn and give checkmate, instead of just giving checkmate.  It is like a bonus pawn.  If the value of the move is considered mathematically then you are looking at (∞ + 1) or just ∞, and those are mathematically equal; but it is not necessary to look at these as a one-dimensional sum.  In a two-dimensional plane a rectangle that is zero height and ∞ length has area zero, but if has height 1 pawn and length ∞ (checkmate pawn equivalent points) then the area is ∞, so that is much better. In this calculation the unit of area is square pawns, denoted P^2 or pawns^2, or in Algebraic Notation, just ^2.

• 19 months ago · Quote · #89

Nice one!

• 19 months ago · Quote · #90
Cavatine wrote:

Of course it is better to take a pawn and give checkmate, instead of just giving checkmate.  It is like a bonus pawn.  If the value of the move is considered mathematically then you are looking at (∞ + 1) or just ∞, and those are mathematically equal; but it is not necessary to look at these as a one-dimensional sum.  In a two-dimensional plane a rectangle that is zero height and ∞ length has area zero, but if has height 1 pawn and length ∞ (checkmate pawn equivalent points) then the area is ∞, so that is much better. In this calculation the unit of area is square pawns, denoted P^2 or pawns^2, or in Algebraic Notation, just ^2.

what is this i dont even

• 19 months ago · Quote · #91

too easy :{)

• 19 months ago · Quote · #92

E-A-S-Y   P-E-A-S-E-Y

got it by trying every move on the board.

• 19 months ago · Quote · #93

Lg6?? Rab8! and no mate

• 19 months ago · Quote · #94

Good puzzle.

• 19 months ago · Quote · #95

2 Solutions

• 19 months ago · Quote · #96

@Cavatine, what are you talking about? So what if the rectangle has a square pawn level of near infinity? In a tournament its worth one point and that's it. Really man, this is not the place to show off mediocre math jargon.

• 19 months ago · Quote · #97

wow. I've loved it

• 19 months ago · Quote · #98

This one was a pretty tricky one for me

• 19 months ago · Quote · #99
shoopi wrote:

A lot of people were confused a bit about white's/black's first move.

1. Bd1 takes away a critical flight square from the black king, namely h5, and has a mate threat. Here's an example of what happens if black plays a different move:

Why did you say a lot of people were confused?

• 19 months ago · Quote · #100

Very nice.  I've had sticky bishops in real games.  The discovered check was elegant.  Thanks chess.com.  That one was worthy.