MESON Chess Problem Database

Problem Display
PID: 108912 (8/3R4/2k1p3/8/P2Qn2K/8/8/8 w - - 0 1)

Lokker, Miklosh S

Boletim da UBP, 1967

8/3R4/2k1p3/8/P2Qn2K/8/8/8

#2

4 + 3

6490 yacpdb 2009
5454 Near Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qd6#
    • 1...Sf2
      • 2.Qd6#
    • 1...Sc3
      • 2.Qd6#
    • 1...Sg3
      • 2.Qd6#
    • 1...Sc5
      • 2.Qd6#
    • 1...Sg5
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sf6
      • 2.Qd6#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Qc7#
        • 2.Qb5#
      • 1...Kb6
        • 2.Qb5#
      • 1...Sc3
        • 2.Qd6#
        • 2.Qc7#
      • 1...Sc5
        • 2.Qd6#
        • 2.Qc7#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Kxd7!
    • 1.Qb4?
      • threat
        • 2.Qb5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sc3
        • 2.Qd6#
      • 1...Kxd7!
    • 1.Qc4+?
      • 1...Kb6
        • 2.Qb5#
      • 1...Sc5
        • 2.Qb5#
      • 1...Kxd7!
    • 1.Qd5+?
      • 1...Kb6
        • 2.Qb5#
      • 1...exd5!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qb5#
      • 1...Kc5
        • 2.Qb5#
      • 1...Kb6
        • 2.Qb5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sc3
        • 2.Qd6#

Anticipated by 154522(1927)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • S(a);P_SPINS(a)::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • S(a);N_GUARD::QAR1(B),XS(a)
      • S(a);N_GUARD::QAR1(B)
HTML5 logo

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).