MESON Chess Problem Database

Problem Display
PID: 209052 (3n1B2/4N3/pR3QK1/prkB1Pp1/5r2/P7/5p2/8 w - - 0 1)

Clutsam, George Howard

Legge, Robin H

The Observer, 1920

(First published on Sun Apr 25 1920)

3n1B2/4N3/pR3QK1/prkB1Pp1/5r2/P7/5p2/8

#2

8 + 8

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qd6#
    • 1...Sc6
      • 2.Rxc6#
    • 1...Se6
      • 2.Rc6#
    • 1...Sb7
      • 2.Rc6#
    • 1...Sf7
      • 2.Rc6#
  • Tries
    • 1.Bg7?
      • threat
        • 2.Qd6#
      • 1...Sc6
        • 2.Rxc6#
        • 2.Qxc6#
      • 1...Se6
        • 2.Rc6#
      • 1...Sb7
        • 2.Rc6#
        • 2.Qc6#
      • 1...Sf7
        • 2.Rc6#
        • 2.Qc6#
      • 1...Rxb6!
    • 1.Qc3+?
      • 1...Kxb6
        • 2.Sc8#
      • 1...Rc4!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Sc8#
      • 1...Rxb6+
        • 2.Be6#
      • 1...Kxb6
        • 2.Sc8#
      • 1...Rxf5
        • 2.Qe3#
      • 1...Sc6
        • 2.Rxc6#
      • 1...Se6
        • 2.Rc6#
      • 1...Sb7
        • 2.Rc6#
      • 1...Sf7
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);SBLOCK::QAB1(E)
    • S(h);N_GUARD::R1(D),XS(h)
    • S(h);N_GUARD::R1(D)
  • Tries
    • Try
      • B(H);
      • Threat
        • QAB1(E)
      • Vars
        • S(h);N_GUARD::R1(D)
      • Refutation
        • R(d);P_PINQ(E),XR(D)
    • Try
      • Q(E);CHECK
      • Vars
        • K(e);S_FLIGHT,XR(D)::S(G)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • Q(E);
    • Threat
      • B(H)+S(G)
    • Vars
      • R(d);CHECK,SBLOCK,XR(D)::QAR(E)+B(B)
      • K(e);S_FLIGHT,XR(D)::S(G)
      • R(b);N_GUARD,XP(C)::QAB(E)
      • S(h);N_GUARD::R1(D),XS(h)
      • S(h);N_GUARD::R1(D)
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).