MESON Chess Problem Database

Problem Display
PID: 95015 (4N2N/5p2/1p2qp2/1P2kP2/Qp1pP3/5PK1/8/8 w - - 0 1)

Lozek, Jozef

Pravda, 1999

4N2N/5p2/1p2qp2/1P2kP2/Qp1pP3/5PK1/8/8

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc8
      • 2.Sxf7#
    • 1...Qc6
      • 2.Sxf7#
    • 1...Qd6
      • 2.Sxf7#
    • 1...d3
      • 2.Qa1#
  • Tries
    • 1.Qc2?
      • threat
        • 2.f4#
      • 1...Qxe8
        • 2.Qc7#
      • 1...d3
        • 2.Qb2#
      • 1...Qb3
        • 2.Qc7#
      • 1...Qxf5!
  • Keys
    • 1.Qa8!
      • threat
        • 2.f4#
      • 1...Qxf5
        • 2.Qd5#
      • 1...Qxe8
        • 2.Qd5#
      • 1...d3
        • 2.Qa1#
      • 1...Qb3
        • 2.Qb8#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qc6
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(e);N_GUARD::S(H),XP(g)
    • P(b);OGATEB::QAB(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • P(A)
      • Vars
        • Q(e);N_GUARD,XS(G)::QAB(C)
        • P(b);OGATEB::QAB(C)
        • Q(e);N_GUARD,P_PINP(A)::QAB(C)
      • Refutation
        • Q(e);XP(F)
  • Actual
    • Q(C);
    • Threat
      • P(A)
    • Vars
      • Q(e);N_GUARD,XP(F)::QAR1(C)
      • Q(e);N_GUARD,XS(G)::QAR1(C)
      • P(b);OGATEB::QAB(C)
      • Q(e);N_GUARD,P_PINP(A)::QAB(C)
      • Q(e);N_GUARD::QAR1(C),XQ(e)
      • Q(e);N_GUARD::S(H),XP(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).