MESON Chess Problem Database

Problem Display
PID: 231534 (8/6N1/8/2K5/2n1k3/6Q1/5P2/8 w - - 0 1)

Schiffert, Gyorgy

Magyar Sakkvilag, 1927

8/6N1/8/2K5/2n1k3/6Q1/5P2/8

#2

4 + 2

5454 Near Snap 2021
6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qe3#
    • 1...Sd2
      • 2.Qe3#
    • 1...Sa3
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sa5
      • 2.Qe3#
    • 1...Se5
      • 2.Qe3#
    • 1...Sb6
      • 2.Qe3#
    • 1...Sd6
      • 2.Qe3#
  • Tries
    • 1.Qc3?
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sd2
        • 2.Qe3#
      • 1...Sa3
        • 2.Qe3#
      • 1...Sa5
        • 2.Qe3#
      • 1...Se5
        • 2.Qe3#
      • 1...Sb6
        • 2.Qe3#
      • 1...Sd6
        • 2.Qe3#
      • 1...Kf4!
    • 1.Qd3+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Ke5
        • 2.Qf5#
        • 2.Qd4#
      • 1...Kxd3!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Kxf3!
    • 1.Qg4+?
      • 1...Ke5
        • 2.Qf5#
        • 2.Qd4#
      • 1...Kd3!
    • 1.Qg6+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Ke5
        • 2.Qf5#
      • 1...Kf3!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qf5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Ke5
        • 2.Qf5#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sd6
        • 2.Qe3#

Anticipated by 154522(1927)

FEATURES

  • Static
    • TYPE = BLOCK_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)
    • S(a);N_GUARD,SBLOCK::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
        • S(a);N_GUARD,SBLOCK::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
  • 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)
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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).