MESON Chess Problem Database

Problem Display
PID: 205720 (3K4/2p5/3kpQ2/3p4/3P4/8/8/8 w - - 0 1)

Schoenerstedt, J

Funkschach, 1925

3K4/2p5/3kpQ2/3p4/3P4/8/8/8

#2

3 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c6
      • 2.Qe5#
      • 2.Qe7#
      • 2.Qf8#
  • Tries
    • 1.Qg7?
      • threat
        • 2.Qxc7#
        • 2.Qd7#
      • 1...e5
        • 2.Qf6#
        • 2.Qh6#
        • 2.Qg6#
        • 2.Qd7#
      • 1...c5
        • 2.Qc7#
        • 2.Qd7#
      • 1...c6
        • 2.Qe5#
        • 2.Qf8#
        • 2.Qc7#
        • 2.Qd7#
        • 2.Qe7#
      • 1...Kc6!
    • 1.Qf4+?
      • 1...e5
        • 2.Qh6#
        • 2.Qf6#
      • 1...Kc6!
    • 1.Qf7?
      • threat
        • 2.Qxc7#
        • 2.Qd7#
      • 1...c5
        • 2.Qc7#
        • 2.Qd7#
      • 1...e5
        • 2.Qg6#
        • 2.Qf6#
        • 2.Qd7#
      • 1...c6
        • 2.Qc7#
        • 2.Qd7#
        • 2.Qe7#
        • 2.Qf8#
      • 1...Kc6!
  • Keys
    • 1.Qf1!
      • 1...Kc6
        • 2.Qa6#
      • 1...e5
        • 2.Qf6#
      • 1...c5
        • 2.Qa6#
      • 1...c6
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);N_PINP(c)
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK,N_PINP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);N_PINP(c)
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);N_PINP(c)
    • Vars
      • K(b);P-FLIGHT::QAR2(B)
      • P(c);OGATEB::QAR2(B)
      • P(d);N_GUARD::QAR(B)
      • P(d);SBLOCK::QAB(B)
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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).