MESON Chess Problem Database

Problem Display
PID: 54923 (2K5/1nQ5/3pp3/R2p4/3k1P2/1bN5/5b2/B1rN1B2 w - - 0 1)

Easter, Norris

1st Prize, Bristol Times and Mirror, 1926

(First published on Sat Oct 9 1926)

2K5/1nQ5/3pp3/R2p4/3k1P2/1bN5/5b2/B1rN1B2

#2

8 + 8

4640 Chess Wizardry: The New ABC of Chess Problems 1996
14868 Pirnie Collection 2012
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Rxa4#
    • 1...Sxa5
      • 2.Qb6#
      • 2.Qa7#
    • 1...Sd8
      • 2.Qb6#
      • 2.Qa7#
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qd3#
      • 1...Rxc3+
        • 2.Bxc3#
      • 1...Rxd1
        • 2.Sxd1#
      • 1...Sxa5
        • 2.Qa7#
      • 1...Bc2
        • 2.Sb1#
      • 1...Bc4
        • 2.Se2#
      • 1...Sc5
        • 2.Sb5#

This anticipates 203195(1951)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD::R(F),XB(c)
  • Actual
    • Q(G);P_SPINS(D)
    • Threat
      • QAR1(G)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XS(D)::B(A),XR(a)
      • R(a);N_PINS(D),XS(B)::B(A)+S(D),XR(a)
      • S(h);OGATE,XR(F)::QAB(G)
      • B(c);N_PINS(D)::B(A)+S(D)
      • B(c);N_PINS(D),SBLOCK::B(A)+S(D),DCHECK
      • S(h);N_PINS(D),SBLOCK::B(A)+S(D),DCHECK
HTML5 logo

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).