MESON Chess Problem Database

Problem Display
PID: 176438 (R1nk1K2/2p1p3/2PqP3/B7/3Q4/6b1/3R4/8 w - - 0 1)

Giegold, Fritz Emil

Schach-Echo, 1963

R1nk1K2/2p1p3/2PqP3/B7/3Q4/6b1/3R4/8

#2

7 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.Qxd7#
  • Tries
    • 1.Qh8?
      • threat
        • 2.Kf7#
        • 2.Kg7#
      • 1...Qd4
        • 2.Kf7#
      • 1...Be5!
    • 1.Qxd6+?
      • 1...exd6
        • 2.e7#
      • 1...Bxd6!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qxe7#
      • 1...exf6+
        • 2.e7#
      • 1...Bh4
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);OGATE::QAR1(B),XQ(b)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);::QAR(B)+K(G)
      • Refutation
        • B(a);
    • Try
      • Q(B);CHECK,XQ(b)
      • Vars
        • P(d);N_SPINP(c),OGATE,P_SPINP(d),XQ(B)::P(E)
      • Refutation
        • B(a);P_SPINB(a),XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XP(d)
    • Vars
      • P(d);CHECK,OGATE,XQ(B)::P(E)
      • B(a);N_GUARD::R(A),XQ(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).