MESON Chess Problem Database

Problem Display
PID: 7202 (1Q6/2pB1p2/2Pp1K1p/7p/p3pk2/5P1R/3P1p2/8 w - - 0 1)

Groeneveld, Cornelis

Comm., StrateGems, 1998

1Q6/2pB1p2/2Pp1K1p/7p/p3pk2/5P1R/3P1p2/8

#2

7 + 9

145 StrateGems 1999

SOLUTION

  • SOUND
  • Sets
    • 1...exf3
      • 2.Qb4#
    • 1...e3
      • 2.Qb4#
    • 1...d5
      • 2.Qxc7#
  • Tries
    • 1.Qa7?
      • threat
        • 2.Qe3#
      • 1...e3
        • 2.Qxe3#
        • 2.Qd4#
        • 2.Qxa4#
        • 2.dxe3#
      • 1...f1S!
    • 1.Qb1?
      • threat
        • 2.Qxe4#
      • 1...exf3
        • 2.Qf5#
        • 2.Qb4#
      • 1...e3
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qb4#
      • 1...d5!
    • 1.Qg8?
      • threat
        • 2.Qg3#
      • 1...exf3
        • 2.Rh4#
      • 1...h4
        • 2.Qg4#
      • 1...f1S!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qxe4#
      • 1...exf3
        • 2.Qe3#
      • 1...e3
        • 2.Qxe3#
        • 2.Qe4#
        • 2.dxe3#
      • 1...d5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • P(c);OGATEB,XP(B)::QAR(G)
    • P(c);OGATEB::QAR(G)
    • P(f);OGATEB,P_SPINP(h)::QAB(G),XP(h)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Refutation
        • P(a);
    • Try
      • Q(G);
      • Threat
        • QAR1(G),XP(c)
      • Refutation
        • P(f);
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • P(c);SBLOCK,XP(B)::R(C)
        • P(e);N_GUARD::QAR1(G)
      • Refutation
        • P(a);
  • Actual
    • Q(G);
    • Threat
      • QAR1(G),XP(c)
    • Vars
      • P(c);OGATE,XP(B)::QAB1(G)
      • P(f);N_GUARD::QAB1(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).