MESON Chess Problem Database

Problem Display
PID: 225700 (K7/8/2N1p3/2pkP3/2p5/2P3p1/8/1Q4B1 w - - 0 1)

Polacek, Ladislav

Praca, 1952

K7/8/2N1p3/2pkP3/2p5/2P3p1/8/1Q4B1

#2

6 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qb7#
  • Tries
    • 1.Ka7?
      • 1...Kxc6
        • 2.Qb7#
      • 1...g2!
    • 1.Kb8?
      • 1...Kxc6
        • 2.Qb7#
      • 1...g2!
    • 1.Bf2?
      • 1...Kxc6
        • 2.Qb7#
      • 1...gxf2
        • 2.Qh1#
      • 1...g2!
    • 1.Be3?
      • 1...Kxc6
        • 2.Qb7#
      • 1...g2!
    • 1.Bd4?
      • threat
        • 2.Se7#
      • 1...Kxc6
        • 2.Qb7#
      • 1...cxd4!
    • 1.Qc2?
      • threat
        • 2.Qg2#
      • 1...g2
        • 2.Qxg2#
      • 1...Kxc6!
    • 1.Qg6?
      • 1...g2
        • 2.Qxg2#
      • 1...Kxc6!
    • 1.Qh7?
      • 1...Kxc6
        • 2.Qb7#
      • 1...g2!
    • 1.Qb2?
      • threat
        • 2.Qg2#
      • 1...Kxc6
        • 2.Qb7#
      • 1...g2
        • 2.Qxg2#
      • 1...Ke4!
  • Keys
    • 1.Bh2!
      • 1...Kxc6
        • 2.Qb7#
      • 1...gxh2
        • 2.Qh1#
      • 1...g2
        • 2.Se7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • K(F);P-FLIGHT
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • B(B);
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
        • P(a);N_GUARD,XB(B)::QAB(A)
      • Refutation
        • P(a);
    • Try
      • B(B);
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • B(B);
      • Threat
        • S(E)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • P(c);XB(B)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • P(a);::QAB(A),XP(a)
      • Refutation
        • K(d);S_FLIGHT,XS(E)
    • Try
      • Q(A);
      • Vars
        • P(a);OGATE::QAB(A),XP(a)
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT,XS(E)
    • Try
      • Q(A);
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
        • P(a);::QAB(A),XP(a)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • B(B);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
      • P(a);N_GUARD,XB(B)::QAB(A)
      • P(a);::S(E)
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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).