![ChessBase India on X: "Problem #40 The queen is the most powerful piece in chess. Can you realize its full potential in this problem? WHITE TO MOVE AND MATE IN 4!! - ChessBase India on X: "Problem #40 The queen is the most powerful piece in chess. Can you realize its full potential in this problem? WHITE TO MOVE AND MATE IN 4!! -](https://pbs.twimg.com/media/D8bLZFJVUAA4Hso.jpg)
ChessBase India on X: "Problem #40 The queen is the most powerful piece in chess. Can you realize its full potential in this problem? WHITE TO MOVE AND MATE IN 4!! -
![Tidskrift för Schack, Volume 50 by Gustaf and Ludvig Colljen [editors]: (1944) 1st Edition Magazine / Periodical | The Book Collector, Inc. ABAA, ILAB Tidskrift för Schack, Volume 50 by Gustaf and Ludvig Colljen [editors]: (1944) 1st Edition Magazine / Periodical | The Book Collector, Inc. ABAA, ILAB](https://pictures.abebooks.com/inventory/1136109257.jpg)
Tidskrift för Schack, Volume 50 by Gustaf and Ludvig Colljen [editors]: (1944) 1st Edition Magazine / Periodical | The Book Collector, Inc. ABAA, ILAB
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Tidskrift for Schack arg. 18 - 1912 by Collijn, Gustaf & Ludwig (eds): Hard Cover (1912) | Glynn's Books
![BIBLIO | Tidskrift för Schack, Volume 16 by Gustaf Collijn (1880-1968) and Ludvig Collijn editors | | 1910 | Nordic Chess Federation BIBLIO | Tidskrift för Schack, Volume 16 by Gustaf Collijn (1880-1968) and Ludvig Collijn editors | | 1910 | Nordic Chess Federation](https://d3525k1ryd2155.cloudfront.net/h/811/575/365575811.4.x.jpg)
BIBLIO | Tidskrift för Schack, Volume 16 by Gustaf Collijn (1880-1968) and Ludvig Collijn editors | | 1910 | Nordic Chess Federation
![Tidskrift för Schack, Volume 22 by Gustaf and Ludvig Collijn [editors] - First Edition - 1916 - from The Book Collector ABAA, ILAB, TBA (SKU: C0875) Tidskrift för Schack, Volume 22 by Gustaf and Ludvig Collijn [editors] - First Edition - 1916 - from The Book Collector ABAA, ILAB, TBA (SKU: C0875)](https://d3525k1ryd2155.cloudfront.net/h/632/506/658506632.0.x.jpg)