MESON Chess Problem Database

Problem Display
PID: 278248 (4B3/RRb1n3/qN1BK3/k7/p7/4n3/8/8 w - - 0 1)

Sumner, Christopher Richard Benson

Western Morning News, 1927

(First published on Sat Sep 3 1927)

4B3/RRb1n3/qN1BK3/k7/p7/4n3/8/8

#2

6 + 6

15239 Valois Notebooks 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Sc4#
    • 1...Sf1
      • 2.Sc4#
    • 1...Sc2
      • 2.Sc4#
    • 1...Sg2
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sg4
      • 2.Sc4#
    • 1...S3d5
      • 2.Sc4#
    • 1...S3f5
      • 2.Sc4#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Rb5#
      • 1...Qxa7
        • 2.Rxa7#
      • 1...Bb6
        • 2.Bb4#
      • 1...Sc6
        • 2.Bxc7#
      • 1...a3!
  • Keys
    • 1.Sc4+!
      • 1...Sxc4
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • S(a);N_GUARD::S(A)
    • S(a);N_GUARD::S(A),XS(a)
  • Tries
    • Try
      • S(A);P_SPINB(B)
      • Threat
        • R1(E)
      • Vars
        • Q(d);N_PINB(B),N_SPINQ(d),OGATE,XR(D)::R(E),XQ(d)
        • B(e);N_PINB(B)::B(B)
        • S(f);N_PINB(B)::B(B),XB(e)
      • Refutation
        • P(b);
  • Actual
    • S(A);CHECK,P_SPINB(B)
    • Vars
      • S(a);XS(A)::R1(E)
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).