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zdrak 90 ( +1 | -1 )
Worst move ever We all make blunders from time to time, don't we ? We have all hung our share of pawn and queens, overlooked forks, and missed mates. But to produce a move which will be truly the WORST MOVE EVER, that takes a touch of brilliance ...

Well, here's my definition for WME (Worst Move Ever): White can deliver checkmate in one move, but instead he makes a move which allows, no, FORCES, Black to give checkmate in one.

Example:
White: Ka1, Re8, Rf8, pawn g6
Black: Kh8, Bg8, pawns a2, a3, b3

White could play 1.Rxg8#, but instead he plays the WME 1.Re7?????? (not enough question marks to describe this move) which leaves black with one legal move at his disposal: 1...b2#

Can you compose other similar positions ? Maybe even some that look natural, as if they could occur in a game ? Extra credit if you can find a WME that actually did occur in a game ....
calmrolfe 30 ( +1 | -1 )
Worst move ever I once watched a blitz match on Kasparov where one of the players absolutely battered her opponent, she wiped him off the board and was left with two Queens and a king versus a solitary King, she then made an abysmal move which produced a stalemate !!. Oh boy, I bet her opponent couldn't believe his luck !!!

Cal
dozer 122 ( +1 | -1 )
WME Hello, zdrak!

I actually composed to cases, the other one forces a mate in two actually, but nevertheless...

Both cases are white move and mate in one (but blunders BADLY)

case #1

White:
King at g1
Rooks at f1 and f3
Bishob at a2
Knight at c7
pawn at h2

Black:
King at f8
Queen at f7
Rooks at e8 and g8
Bishob at g6
Knight at f2
Pawns at e7 and e3

Since Black's queen is pinned, White has a simple win 1.Ne6#. But he plays 1.Rxf7+?????? (nothing wrong grabbing some material, eh??). Now Black is FORCED to play 1. - Bxf7#.

case# 2

White:
King at d2
Queen at f2
Rooks at c1 and f1
Bishobs at g8 and h8

Black:
King at a2
Queen at d7
Rook at d8
Bishob at b3
Pawns at a3, d3 and f3

Here White has a clear win: 1. Ra1#
But again, White blunders:
1.Ke1+????? (it's just a check, what could go wrong??)
From now on the only legal moves are:
(Note that the bishob at b3 is pinned)
1. - d2+
2. Qxd2+ Qxd2#

Of course with little improvements this last position would be a FORCED mate in one, but I wanted a pawn advance to be part of it...

(I checked these examples with CM5500, auto-annotating the move lists gives fun remarks "d2+ forced. Black has a mate in 1...")

What do you think?

Of couse they don't look very natural but I can't think better examples right now...

Regards Teemu
tonlesu 68 ( +1 | -1 )
Worst move Perhaps not the worst move ever but a tournament game in which Alekhine allows his opponent to fork his queen and king. It occured at the Margate Easter Congress 1937. Buerger is playing white and Alekhine is black.

white
king at g1
queen at d1
rook at e2
bishop at c4
knights at e4, f1
pawns at a4, b2, f2, g3, h2

black
king at g7
queen at f5
rook at f8
bishops at b7, d4
pawns at a5, b6, c5, d7, g4, h7

Now if Alekhine plays 34... Nb4 he reduces white to a state of helplessness. Instead Alekhine plays this gruesome blunder 34...Nf4 35. gxf4 Bxe4---So far so good but now Alekhine completely overlooked the forking reply 36. Ng3 Qxf4???? and Alekhine is blind to the royal fork 37. Nh5!
Buerger incredibly missed this and played 37. Nxe4 and won the game.
refutor 15 ( +1 | -1 )
worst move ever...samisch-capablanca i don't know if this was the worst move ever, but easily the worst by capablanca

samisch - capablanca karlsbad 1929
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 d6 6.f3 c5 7.e4 Nc6 8.Be3 b6 9.Bd3 Ba6?? 10.Qa4 Bb7 11.d5 and it was basically 1-0
zdrak 29 ( +1 | -1 )
Nice , dozer I like the positions you gave ... especially the 1st one, where the WME looks like something one might actually play in blitz ;-) I am tempted to show the position to several intermediate-strength players with 5-10 second of thinking time - I wonder how many of them will take the queen ...
dozer 4 ( +1 | -1 )
Thanks zdrak If you do show it, please report the results! :)
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