MESON Chess Problem Database

Problem Display
PID: 222466 (7Q/8/8/2N1p3/3k4/4N3/1R6/K7 w - - 0 1)

Whitner, HK

Philadelphia Times, 1883

7Q/8/8/2N1p3/3k4/4N3/1R6/K7

#2

5 + 2

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qxe5#
  • Tries
    • 1.Qd8+?
      • 1...Kc3
        • 2.Sa4#
        • 2.Se4#
        • 2.Rb3#
        • 2.Qd2#
        • 2.Qd3#
      • 1...Kxc5
        • 2.Qb6#
        • 2.Qd5#
      • 1...Kxe3!
  • Keys
    • 1.Qf6!
      • 1...Kc3
        • 2.Qxe5#
      • 1...Kxe3
        • 2.Qf2#
      • 1...Kxc5
        • 2.Qb6#

Anticipated by 30870(1875), 214456(1878), 214590(1878)

This anticipates 181844(1905)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(E),XP(b)
  • Tries
    • Try
      • Q(E);CHECK,N_PINP(b)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB(E),XP(b)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(C)::QAB1(E)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(D)::QAB1(E)
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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).