MESON Chess Problem Database

Problem Display
PID: 178113 (1N1Q4/6R1/4p3/4k3/1P4P1/3Pp3/4p1P1/4K3 w - - 0 1)

Engberg, EW

Philadelphia Times, 1898

1N1Q4/6R1/4p3/4k3/1P4P1/3Pp3/4p1P1/4K3

#2

8 + 4

5454 Near Snap 2018
3713 Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qg5+?
      • 1...Kd6
        • 2.Rd7#
        • 2.Qc5#
      • 1...Kd4!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Rd7#
      • 1...Kd6
        • 2.Rd7#
        • 2.Qd4#
      • 1...Kxf6!
    • 1.Qc7+?
      • 1...Kd4
        • 2.Rd7#
      • 1...Kd5
        • 2.Rd7#
        • 2.Qc5#
      • 1...Kf6!
    • 1.Qf8?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kd4!
  • Keys
    • 1.Qh8!
      • 1...Kd4
        • 2.Rd7#
      • 1...Kf4
        • 2.Qh2#
      • 1...Kd5
        • 2.Rd7#
      • 1...Kd6
        • 2.Rd7#
      • 1...Kf6
        • 2.Sd7#

Anticipated by 167289(0000), 29186(1876), 102942(1894), 5002(1896)

This anticipates 200485(1906), 167288(1908-1910)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);P-FLIGHT::R(F)
      • Refutation
        • K(c);S_FLIGHT,XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);S_FLIGHT::R(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(c);P-FLIGHT::QAR1(H)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(H);
    • Vars
      • K(c);S_FLIGHT::QAB(H)+R(F),DCHECK
      • K(c);S_FLIGHT::QAB(H)
      • K(c);P-FLIGHT::R(F)
      • K(c);S_FLIGHT::R1(F)
      • K(c);S_FLIGHT::S(G)
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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).