MESON Chess Problem Database

Problem Display
PID: 53086 (8/5K2/8/3pkN2/4ppQ1/8/3P4/1B6 w - - 0 1)

Jacobs, Charles Sumner

Comm., Christian Science Monitor, 1950

8/5K2/8/3pkN2/4ppQ1/8/3P4/1B6

#2

5 + 4

268 Chess Life 1954

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Qg7#
      • 2.d4#
  • Tries
    • 1.Qe2?
      • 1...Kxf5
        • 2.Qh5#
      • 1...d4
        • 2.Qb5#
        • 2.Qxe4#
      • 1...e3
        • 2.d4#
      • 1...f3!
    • 1.Qg6?
      • threat
        • 2.Qe6#
        • 2.Qf6#
      • 1...d4
        • 2.Qe6#
      • 1...f3!
  • Keys
    • 1.Qf3!
      • 1...Kxf5
        • 2.Qh5#
      • 1...exf3
        • 2.d4#
      • 1...d4
        • 2.Qxe4#
      • 1...e3
        • 2.d4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);P_PINP(a)
      • Vars
        • K(d);OGATEB,P-FLIGHT,XS(D)::QAR2(C)
        • P(a);::P(B)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(C)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Vars
      • K(d);OGATEB,P-FLIGHT,P_SPINP(a),XS(D)::QAR2(C)
      • P(a);N_GUARD,XQ(C)::P(B)
      • P(c);N_GUARD::QAR1(C),XP(a)
      • P(a);N_GUARD::P(B)
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).