MESON Chess Problem Database

Problem Display
PID: 35509 (7B/K2pp1r1/8/2p2pQn/4N3/p2Pp1p1/pk3qRr/N5R1 w - - 0 1)

Zander, Heinz

Schach-Echo, 1961

7B/K2pp1r1/8/2p2pQn/4N3/p2Pp1p1/pk3qRr/N5R1

#2

8 + 13

3692 Ausgewahlte Schachaufgaben von Heinz Zander 2000

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Qc1#
      • 2.Qd2#
    • 1...fxe4
      • 2.Qe5#
    • 1...f4
      • 2.Qe5#
  • Tries
    • 1.Qxe7?
      • threat
        • 2.Qe5#
      • 1...c4
        • 2.Qb4#
      • 1...d5
        • 2.Qb7#
      • 1...d6
        • 2.Qb7#
      • 1...e2!
  • Keys
    • 1.Qxe3!
      • threat
        • 2.Qc1#
      • 1...Qd2
        • 2.Qxd2#
      • 1...c4
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(i);OGATE,XS(E)::QAB(F)
    • P(i);OGATE::QAB(F)
  • Tries
    • Try
      • Q(F);XP(l)
      • Threat
        • QAB(F)
      • Vars
        • P(h);OGATE::QAR2(F)
        • P(k);OGATE,P_PINQ(F)::QAR(F)
      • Refutation
        • P(f);N_SPINQ(c)
  • Actual
    • Q(F);XP(f)
    • Threat
      • QAB1(F)
    • Vars
      • Q(c);N_GUARD::QAR2(F),XQ(c)
      • P(h);OGATE,P_PINQ(F)::QAR(F)
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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).