MESON Chess Problem Database
Problem Display
PID: 186966 (3k3r/p2P4/NpP3Pp/3pR3/R7/2P1pPp1/3p2Kn/3Qb3 w - - 0 1)
de Castro, B
The Observer, 1933
(First published on Sun Dec 10 1933)
#3
10 + 11
| 3713 | Snap | 2019 |
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rh7
- 2.Re8#
- 1...Re8
- 2.Rxe8#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Sxf3
- 2.Qxf3
- threat
- 3.Qf6#
- 2...Rh7
- 3.Re8#
- 3.Qf8#
- 2...Re8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rf8
- 3.Qxf8#
- threat
- 2.Qxf3
- 1...d4
- 2.Rxd4
- threat
- 3.c7#
- threat
- 2.Rxd4
- 1...Rh7
- Tries
- 1.Ra1?
- threat
- 2.Qa4
- threat
- 3.Qh4#
- 3.c7#
- threat
- 2.Qa4
- 1...Sxf3
- 2.Qxf3
- threat
- 3.Qf6#
- 2...Rh7
- 3.Re8#
- 3.Qf8#
- 2...Re8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rf8
- 3.Qxf8#
- threat
- 2.Qa4
- threat
- 3.c7#
- 2...Sh4+
- 3.Qxh4#
- 2...Sxe5
- 3.Qh4#
- 2...b5
- 3.Qa5#
- threat
- 2.Qxf3
- 1...Rf8
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...Sg4
- 2.Qa4
- threat
- 3.c7#
- 2...Sxe5
- 3.Qh4#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...d4
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...b5!
- threat
- 1.Ra2?
- threat
- 2.Qa4
- threat
- 3.Qh4#
- 3.c7#
- threat
- 2.Qa4
- 1...Sxf3
- 2.Qxf3
- threat
- 3.Qf6#
- 2...Rh7
- 3.Re8#
- 3.Qf8#
- 2...Re8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rf8
- 3.Qxf8#
- threat
- 2.Qa4
- threat
- 3.c7#
- 2...Sh4+
- 3.Qxh4#
- 2...Sxe5
- 3.Qh4#
- 2...b5
- 3.Qa5#
- threat
- 2.Qxf3
- 1...Rf8
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...Sg4
- 2.Qa4
- threat
- 3.c7#
- 2...Sxe5
- 3.Qh4#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...d4
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...b5!
- threat
- 1.Ra3?
- threat
- 2.Qa4
- threat
- 3.Qh4#
- 3.c7#
- threat
- 2.Qa4
- 1...Sxf3
- 2.Qxf3
- threat
- 3.Qf6#
- 2...Rh7
- 3.Re8#
- 3.Qf8#
- 2...Re8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rf8
- 3.Qxf8#
- threat
- 2.Qa4
- threat
- 3.c7#
- 2...Sh4+
- 3.Qxh4#
- 2...Sxe5
- 3.Qh4#
- 2...b5
- 3.Qa5#
- threat
- 2.Qxf3
- 1...Rf8
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...Sg4
- 2.Qa4
- threat
- 3.c7#
- 2...Sxe5
- 3.Qh4#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...d4
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...b5!
- threat
- 1.Rb4?
- threat
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...Sxf3
- 2.Qxf3
- threat
- 3.Qf6#
- 2...Rh7
- 3.Re8#
- 3.Qf8#
- 2...Re8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rf8
- 3.Qxf8#
- threat
- 2.Qxf3
- 1...b5
- 2.Rxb5
- threat
- 3.Rb8#
- threat
- 2.Qa4
- threat
- 3.Qa5#
- 2...bxa4
- 3.Rb8#
- threat
- 2.Qa1
- threat
- 3.Qa5#
- threat
- 2.Rxb5
- 1...Sg4!
- threat
- 1.Rc4?
- threat
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...Sxf3
- 2.Qxf3
- threat
- 3.Qf6#
- 2...Rh7
- 3.Re8#
- 3.Qf8#
- 2...Re8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rf8
- 3.Qxf8#
- threat
- 2.Qxf3
- 1...b5
- 2.Qa1
- threat
- 3.Qa5#
- threat
- 2.Qa1
- 1...Sg4!
- threat
- 1.Rd4?
- threat
- 2.Rdxd5
- threat
- 3.c7#
- threat
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Rdxd5
- 1...Sxf3
- 2.Qxf3
- threat
- 3.Qf6#
- 2...Rh7
- 3.Re8#
- 3.Qf8#
- 2...Re8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rf8
- 3.Qxf8#
- threat
- 2.Qxf3
- 1...b5
- 2.Rdxd5
- threat
- 3.c7#
- threat
- 2.Qa1
- threat
- 3.Qa5#
- threat
- 2.Rdxd5
- 1...Sg4!
- threat
- 1.Rae4?
- threat
- 2.Rxd5
- threat
- 3.c7#
- threat
- 2.Re8+
- 2...Rxe8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rxe8
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Rxd5
- 1...Sxf3
- 2.Re8+
- 2...Rxe8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rxe8
- 2.Qxf3
- threat
- 3.Qf6#
- 2...Rh7
- 3.Re8#
- 3.Qf8#
- 2...Re8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rf8
- 3.Qxf8#
- threat
- 2.Re8+
- 1...b5
- 2.Rxd5
- threat
- 3.c7#
- threat
- 2.Re8+
- 2...Rxe8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rxe8
- 2.Qa1
- threat
- 3.Qa5#
- threat
- 2.Rxd5
- 1...Rf8
- 2.Rxd5
- threat
- 3.c7#
- threat
- 2.Re8+
- 2...Rxe8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rxe8
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Rxd5
- 1...Rg8
- 2.Rxd5
- threat
- 3.c7#
- threat
- 2.Re8+
- 2...Rxe8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rxe8
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Rxd5
- 1...Sg4
- 2.Re8+
- 2...Rxe8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rxe8
- 2.Re8+
- 1...d4
- 2.Rxd4
- threat
- 3.c7#
- threat
- 2.Rd5
- threat
- 3.c7#
- threat
- 2.Re7
- threat
- 3.c7#
- threat
- 2.Re8+
- 2...Rxe8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rxe8
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Rxd4
- 1...dxe4!
- threat
- 1.Rf4?
- threat
- 2.Rf7
- threat
- 3.c7#
- threat
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Rf7
- 1...b5
- 2.Rf7
- threat
- 3.c7#
- threat
- 2.Qa1
- threat
- 3.Qa5#
- threat
- 2.Rf7
- 1...Sg4
- 2.Rf7
- threat
- 3.c7#
- threat
- 2.Rf7
- 1...Sxf3!
- threat
- 1.Rh4?
- threat
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...Sxf3
- 2.Qxf3
- threat
- 3.Qf6#
- 2...Rh7
- 3.Re8#
- 3.Qf8#
- 2...Re8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rf8
- 3.Qxf8#
- threat
- 2.Qxf3
- 1...b5
- 2.Qa1
- threat
- 3.Qa5#
- threat
- 2.Qa1
- 1...Sg4!
- threat
- 1.Ra5?
- threat
- 2.Raxd5
- threat
- 3.c7#
- threat
- 2.Qa4
- threat
- 3.Qh4#
- 3.c7#
- threat
- 2.Raxd5
- 1...Sxf3
- 2.Qxf3
- threat
- 3.Qf6#
- 2...Rh7
- 3.Re8#
- 3.Qf8#
- 2...Re8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rf8
- 3.Qxf8#
- threat
- 2.Qxf3
- 1...bxa5
- 2.Qb3
- threat
- 3.Qb8#
- threat
- 2.Qa4
- threat
- 3.Qh4#
- 3.Qxa5#
- 3.c7#
- threat
- 2.Qb1
- threat
- 3.Qb8#
- threat
- 2.Qb3
- 1...Rf8
- 2.Raxd5
- threat
- 3.c7#
- threat
- 2.Raxd5
- 1...d4
- 2.Rad5
- threat
- 3.c7#
- threat
- 2.Rad5
- 1...b5
- 2.Rxb5
- threat
- 3.Rb8#
- threat
- 2.Rxb5
- 1...Sg4!
- threat
- 1.g7?
- threat
- 2.gxh8Q#
- 2.gxh8R#
- 1...Sxf3
- 2.gxh8Q#
- 2.gxh8R#
- 1...Sg4
- 2.gxh8Q#
- 2.gxh8R#
- 1...Rh7
- 2.Re8#
- 2.g8Q#
- 2.g8R#
- 1...Re8
- 2.Rxe8#
- 2.dxe8Q#
- 2.dxe8R#
- 1...Rf8
- 2.gxf8Q#
- 2.gxf8R#
- 1...Bf2
- 2.gxh8Q#
- 2.gxh8R#
- 1...Sf1
- 2.gxh8Q#
- 2.gxh8R#
- 1...e2
- 2.gxh8Q#
- 2.gxh8R#
- 1...d4
- 2.gxh8Q#
- 2.gxh8R#
- 1...b5
- 2.gxh8Q#
- 2.gxh8R#
- 1...h5
- 2.gxh8Q#
- 2.gxh8R#
- 1...Rg8!
- threat
- 1.Ra1?
- Keys
- 1.Rg4!
- threat
- 2.Qa4
- threat
- 3.c7#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...Sxf3
- 2.Qxf3
- threat
- 3.Qf6#
- 2...Rh7
- 3.Re8#
- 3.Qf8#
- 2...Re8
- 3.Rxe8#
- 3.dxe8Q#
- 3.dxe8R#
- 2...Rf8
- 3.Qxf8#
- threat
- 2.Qxf3
- 1...Sxg4
- 2.Qa4
- threat
- 3.c7#
- 2...Sxe5
- 3.Qh4#
- 2...b5
- 3.Qa5#
- threat
- 2.Qa4
- 1...b5
- 2.Qa1
- threat
- 3.Qa5#
- threat
- 2.Qa1
- threat
- 1.Rg4!
Anticipated by 34577(1924)
This anticipates 271067(1960)
FEATURES
NOT CLASSIFIED
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).