MESON Chess Problem Database
Problem Display
PID: 23507 (4nr1q/R7/1p6/rk1pQ1n1/pB6/P2N2p1/1K2N3/3R1Bb1 w - - 0 1)
Anderson, Gerald Frank
1st HM., The Observer, 1962
#3
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxe5+
- 2.Sxe5
- threat
- 3.Sc3#
- 3.Sd4#
- 3.Sf4#
- 2...Rf2
- 3.Rxd5#
- threat
- 2.Sxe5
- 1...Qh3
- 2.Qxd5+
- 2...Bc5
- 3.Sc3#
- 3.Sd4#
- 2...Bc5
- 2.Qxd5+
- 1...Qh4
- 2.Qxd5+
- 2...Bc5
- 3.Sc3#
- 2...Bc5
- 2.Qxd5+
- 1...Qh5
- 2.Qxd5+
- 2...Bc5
- 3.Sc3#
- 3.Sd4#
- 2...Bc5
- 2.Qxd5+
- 1...Qh6
- 2.Sf2
- threat
- 3.Sd4#
- 3.Qxd5#
- 2...Kc4
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 2...Kc6
- 3.Sd4#
- threat
- 2.Qxd5+
- 2...Bc5
- 3.Sc3#
- 3.Sd4#
- 2...Bc5
- 2.Sf2
- 1...Qh7
- 2.Qxd5+
- 2...Bc5
- 3.Sc3#
- 3.Sd4#
- 2...Bc5
- 2.Qxd5+
- 1...Ra6
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Qxd5#
- 2...Kc6
- 3.Qxd5#
- 2...Kc4
- 2.Sc3+
- 1...Rf2
- 2.Sxf2
- threat
- 3.Sd4#
- 2...Kc4
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 2...Kc6
- 3.Sd4#
- threat
- 2.Sxf2
- 1...Rf6
- 2.Qxd5+
- 2...Bc5
- 3.Sc3#
- 3.Sd4#
- 2...Bc5
- 2.Qxd5+
- 1...Rg8
- 2.Sf2
- threat
- 3.Sd4#
- 2...Kc4
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 2...Kc6
- 3.Sd4#
- threat
- 2.Sf2
- 1...Bh2
- 2.Sd4+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Rc1#
- 2...Kc4
- 2.Sdf4
- threat
- 3.Sd4#
- 2...Kc4
- 3.Sc1#
- 3.Sg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 2...Kc6
- 3.Sd4#
- threat
- 2.Sd4+
- 1...Bd4+
- 2.Sxd4+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Rc1#
- 2...Kc4
- 2.Sxd4+
- 1...Bc5
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Qxd5#
- 2...Kc6
- 3.Qxd5#
- 2...Kc4
- 2.Sc3+
- 1...Sf7
- 2.Sf2
- threat
- 3.Sd4#
- 2...Kc4
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 2...Kc6
- 3.Sd4#
- threat
- 2.Sf2
- 1...Sd6
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 2...Kc6
- 3.Qxd6#
- 2...Kc4
- 2.Sc3+
- 1...Sf6
- 2.Sc3+
- 2...Kc4
- 3.Sc1#
- 3.Se1#
- 3.Sf2#
- 3.Sf4#
- 3.Sc5#
- 2...Kc6
- 3.Rc7#
- 3.Qd6#
- 3.Qc7#
- 2...Kc4
- 2.Sf2
- threat
- 3.Sd4#
- 2...Kc4
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 2...Kc6
- 3.Sd4#
- threat
- 2.Sc3+
- 1...Sc7
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 2...Kc6
- 3.Rxc7#
- 3.Qd6#
- 3.Qxc7#
- 2...Kc4
- 2.Sc3+
- 1...Sg7
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 2...Kc6
- 3.Rc7#
- 3.Qd6#
- 3.Qc7#
- 2...Kc4
- 2.Sf2
- threat
- 3.Sd4#
- 3.Qxd5#
- 2...Kc4
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 2...Kc6
- 3.Sd4#
- threat
- 2.Qxd5+
- 2...Bc5
- 3.Sc3#
- 3.Sd4#
- 2...Bc5
- 2.Sc3+
- 1...Qxe5+
- Tries
- 1.Sc3+?
- 1...Kc4
- 2.Sf2#
- 2.Sf4#
- 1...Kc6!
- 1...Kc4
- 1.Sd4+?
- 1...Kc4
- 2.Sf2#
- 2.Sf4#
- 2.Rc1#
- 1...Bxd4+!
- 1...Kc4
- 1.Sf2?
- threat
- 2.Sd4#
- 1...Kc4
- 2.Sc1#
- 2.Sxg1#
- 2.Sc3#
- 2.Sxg3#
- 2.Sd4#
- 2.Sf4#
- 1...Kc6
- 2.Sd4#
- 1...Rxf2!
- threat
- 1.Sc3+?
- Keys
- 1.Qg7!
- threat
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Se5
- threat
- 3.Sc3#
- 3.Sd4#
- 3.Sf4#
- 3.Qd7#
- threat
- 2.Sc3+
- 1...Qxg7+
- 2.Se5
- threat
- 3.Sc3#
- 3.Sd4#
- 3.Sf4#
- 2...Rf2
- 3.Rxd5#
- threat
- 2.Se5
- 1...Bd4+
- 2.Sxd4+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 3.Rc1#
- 2...Kc4
- 2.Sxd4+
- 1...Kc4
- 2.Sc3
- threat
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Rf2+
- 3.Sxf2#
- threat
- 2.Se5+
- 2...Kb5
- 3.Sc3#
- 3.Sd4#
- 3.Sf4#
- 3.Qd7#
- 2...Kb5
- 2.Sc3
- 1...Kc6
- 2.Se5+
- 2...Kb5
- 3.Sc3#
- 3.Sd4#
- 3.Sf4#
- 3.Qd7#
- 2...Kb5
- 2.Se5+
- 1...Rxa7
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Ka6
- 3.Sc5#
- 2...Kc6
- 3.Se5#
- 2...Kc4
- 2.Sc3+
- 1...Rxf1
- 2.Sc3+
- 2...Kc4
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Sc3+
- 1...Sxg7
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 2...Kc4
- 2.Sc3+
- 1...Qh2
- 2.Qd7+
- 2...Kc4
- 3.Se5#
- 2...Kc4
- 2.Qd7+
- 1...Qh3
- 2.Sc3+
- 2...Kc4
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 2...Kc4
- 2.Se5
- threat
- 3.Sc3#
- 3.Sd4#
- 2...Qg2
- 3.Qd7#
- 2...Qh2
- 3.Qd7#
- 2...Rf2
- 3.Rxd5#
- threat
- 2.Sc3+
- 1...Qh4
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Qd7+
- 2...Kc4
- 3.Se5#
- 2...Kc4
- 2.Sc3+
- 1...Qh5
- 2.Sc3+
- 2...Kc4
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Se5
- threat
- 3.Sc3#
- 3.Sd4#
- 3.Qd7#
- 2...Qxe2+
- 3.Bxe2#
- threat
- 2.Qd7+
- 2...Kc4
- 3.Se5#
- 2...Kc4
- 2.Sc3+
- 1...Qh6
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Se5
- threat
- 3.Sc3#
- 3.Sd4#
- 3.Sf4#
- 2...Qh2
- 3.Qd7#
- 2...Rf2
- 3.Rxd5#
- threat
- 2.Sc3+
- 1...Qh7
- 2.Sc3+
- 2...Kc4
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 2...Kc4
- 2.Sc3+
- 1...Rf2
- 2.Sxf2
- threat
- 3.Sd4#
- 2...Kc4
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 2...Kc6
- 3.Sd4#
- 2...d4
- 3.Sxd4#
- threat
- 2.Sxf2
- 1...Rf3
- 2.Sc3+
- 2...Kc4
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Sc3+
- 1...Rf4
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sxf4#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Sc3+
- 1...Rf5
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Se5
- threat
- 3.Sc3#
- 3.Sd4#
- 3.Sf4#
- 3.Qd7#
- threat
- 2.Sc3+
- 1...Rf6
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Sc3+
- 1...Rf7
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 2...Kc4
- 2.Sc3+
- 1...Rg8
- 2.Sc3+
- 2...Kc4
- 3.Sc1#
- 3.Se1#
- 3.Sf2#
- 3.Sf4#
- 3.Sc5#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Sf2
- threat
- 3.Sd4#
- 2...Kc4
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 2...Kc6
- 3.Sd4#
- 2...d4
- 3.Sxd4#
- threat
- 2.Se5
- threat
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 3.Qd7#
- threat
- 2.Sc3+
- 1...Bf2
- 2.Sc3+
- 2...Kc4
- 3.Sc1#
- 3.Se1#
- 3.Sxf2#
- 3.Sf4#
- 3.Sc5#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Se5
- threat
- 3.Sc1#
- 3.Sg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 3.Qd7#
- threat
- 2.Sc3+
- 1...Bh2
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Sd4+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 3.Rc1#
- 2...Kc4
- 2.Sdf4
- threat
- 3.Sd4#
- 2...Kc4
- 3.Sc1#
- 3.Sg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 2...Kc6
- 3.Sd4#
- 2...d4
- 3.Sxd4#
- threat
- 2.Se5
- threat
- 3.Sc3#
- 3.Sd4#
- 3.Sf4#
- 3.Rxd5#
- 3.Qd7#
- threat
- 2.Sc3+
- 1...Be3
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Sc3+
- 1...Bc5
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Qd7#
- 2...Kc4
- 2.Sc3+
- 1...Sf3
- 2.Sc3+
- 2...Kc4
- 3.Sc1#
- 3.Se1#
- 3.Sf2#
- 3.Sf4#
- 3.Sc5#
- 3.Se5#
- 2...Kc6
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Se5
- threat
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 3.Qd7#
- threat
- 2.Sc3+
- 1...Se4
- 2.Se5
- threat
- 3.Sc3#
- 3.Sd4#
- 3.Sf4#
- 3.Qd7#
- threat
- 2.Se5
- 1...Sf7
- 2.Sf2
- threat
- 3.Sd4#
- 2...Kc4
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 2...Kc6
- 3.Sd4#
- 2...d4
- 3.Sxd4#
- threat
- 2.Sf2
- 1...Sd6
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Rc7#
- 3.Qc7#
- 3.Qd7#
- 2...Kc4
- 2.Sc3+
- 1...Sf6
- 2.Sc3+
- 2...Kc4
- 3.Sc1#
- 3.Se1#
- 3.Sf2#
- 3.Sf4#
- 3.Sc5#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Rc7#
- 3.Qb7#
- 3.Qc7#
- 2...Kc4
- 2.Sf2
- threat
- 3.Sd4#
- 2...Kc4
- 3.Sc1#
- 3.Sxg1#
- 3.Sc3#
- 3.Sxg3#
- 3.Sd4#
- 3.Sf4#
- 2...Kc6
- 3.Sd4#
- 2...d4
- 3.Sxd4#
- threat
- 2.Sc3+
- 1...Sc7
- 2.Sc3+
- 2...Kc4
- 3.Sf2#
- 3.Sf4#
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Rxc7#
- 3.Qxc7#
- 2...Kc4
- 2.Se5
- threat
- 3.Sc3#
- 3.Sd4#
- 3.Sf4#
- 3.Qd7#
- threat
- 2.Sc3+
- 1...g2
- 2.Sc3+
- 2...Kc4
- 3.Se5#
- 2...Kc6
- 3.Se5#
- 3.Qb7#
- 3.Qd7#
- 2...Kc4
- 2.Se5
- threat
- 3.Sc3#
- 3.Sd4#
- 3.Qd7#
- threat
- 2.Sc3+
- 1...d4
- 2.Se5
- threat
- 3.Sc3#
- 3.Sxd4#
- 3.Qd7#
- threat
- 2.Se5
- threat
- 1.Qg7!
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).