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Chess World Online Chess Forum - 'rooking' or 'bishoping' a pawn

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  Play ... Latest Forum Posts > Chess Forums > Chess - General discussion
  'rooking' or 'bishoping' a pawn




apctguy

Chess rating: 2885



 Topics started


United States
Give chess goodie
Mon Apr 4 2016 1:15AM | MsgID: 18947756


there is no mention of the poor little Knight !..








Taotaomonas

Chess rating: 1699





 Topics started


Australia
Give chess goodie
Mon Mar 28 2016 10:30PM | MsgID: 18935500


Originally posted by: "retiarius"
Tao, I understand what you meant now.

You have shown a position where you do not promote to Q or R to prevent stalemate.

I was trying to show a win by promoting to R or B.




Yes mate cheers.







retiarius

Chess rating: 1757
LCF 161 Fide approx. 2055




 Topics started


United Kingdom
Give chess goodie
Sun Mar 27 2016 9:21PM | MsgID: 18933105


Tao, I understand what you meant now.

You have shown a position where you do not promote to Q or R to prevent stalemate.

I was trying to show a win by promoting to R or B.







Taotaomonas

Chess rating: 1699





 Topics started


Australia
Give chess goodie
Sun Mar 27 2016 10:34AM | MsgID: 18931942


Point taken guys. I had not really gone for the logical progression and accept pxb as a winning move.
I was simply trying to illustrate to Ocks question why a rook or queen promotion would not work.
Will be more specific and realistic in future. It was just a very quick mock up.







bwzins64

Chess rating: 2217





 Topics started


United States
Give chess goodie
Chess goodies: 1
Sun Mar 27 2016 6:19AM | MsgID: 18931656


Originally posted by: "Taotaomonas"
Was mine that bad an example ๐Ÿ˜›




It helps if you give the moves. With white to move, Fritz gives mate in no less than three moves. One of the lines given is 1.cxb8=Q+ Kxb8 2.Kb6 Kc8 3. e8=Q#. So you see, white can win without under promoting to a bishop.







retiarius

Chess rating: 1757
LCF 161 Fide approx. 2055




 Topics started


United Kingdom
Give chess goodie
Sat Mar 26 2016 7:57PM | MsgID: 18931090


Originally posted by: "Taotaomonas"
Was mine that bad an example ๐Ÿ˜›




Sorry Tao I didn't understand your example







Taotaomonas

Chess rating: 1699





 Topics started


Australia
Give chess goodie
Sat Mar 26 2016 7:18PM | MsgID: 18930987


Was mine that bad an example ๐Ÿ˜›







retiarius

Chess rating: 1757
LCF 161 Fide approx. 2055




 Topics started


United Kingdom
Give chess goodie
Sat Mar 26 2016 6:07PM | edited: 6:13:08 | MsgID: 18930848


[Quote from: "ockendon"]
[Quote from: "retiarius"]White promotes to a rook, avoiding stalemate, then mates the move after.


Ah yes, thank you.

Which just leaves the bishop to find a reason for ...



A reason for promoting to bishop is again to avoid a stalemate, that might happen with a promotion to a R or Q.

In the diagram below, promoting to Q or R is stalemate.

Instead, the fastest mate is 1.a8(B), Kf8 2.b8(Q or R), Kf7 3.Bd5#.








Analyse position



And if 2..Ke8 3.Ke6 mates and if 2..Kg8 3.Kg6 mates







Taotaomonas

Chess rating: 1699





 Topics started


Australia
Give chess goodie
Sat Mar 26 2016 10:32AM | edited: 10:42:03 | MsgID: 18930027











Analyse position










ockendon

Chess rating: 1777
LCF 109 Fide approx. 1795






 Topics started


England
Give chess goodie
Fri Mar 25 2016 5:11PM | edited: 9:26:58 | MsgID: 18928778









Analyse position



In this position, promoting to a bishop would be just as good as promoting to a queen - but not better.

Although, to answer my original question, one might prefer the bishop option, for the amusement factor!







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