MESON Chess Problem Database

Problem Display
PID: 84217 (R3N3/3k4/2pPp3/8/1p1p2p1/8/8/3QK3 w - - 0 1)

Drazkowski, Krzysztof

Szachista, 1992

R3N3/3k4/2pPp3/8/1p1p2p1/8/8/3QK3

#2

5 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qa4#
    • 1...e5
      • 2.Qxg4#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qh7#
      • 1...c5
        • 2.Qa4#
      • 1...e5
        • 2.Qf5#
      • 1...d3!
    • 1.Qf3?
      • threat
        • 2.Qf7#
      • 1...c5
        • 2.Qb7#
      • 1...gxf3!
    • 1.Qa1?
      • threat
        • 2.Qa7#
      • 1...c5
        • 2.Qa4#
      • 1...e5!
    • 1.Qxd4?
      • threat
        • 2.Sf6#
        • 2.Qa7#
        • 2.Qg7#
      • 1...e5
        • 2.Qxg4#
      • 1...c5!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qh7#
      • 1...c5
        • 2.Qb5#
      • 1...e5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATEB::QAB(A)
    • P(e);OGATEB::QAB(A),XP(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(d);OGATEB::QAB(A)
        • P(e);OGATEB::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • P(d);OGATE::QAR2(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(d);OGATEB::QAB(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);XP(b)
      • Threat
        • DUALS(3)
      • Vars
        • P(e);OGATEB::QAB(A),XP(c)
      • Refutation
        • P(d);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • P(d);OGATEB::QAB(A)
      • P(e);OGATEB::QAB(A)
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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).