MESON Chess Problem Database

Problem Display
PID: 231542 (8/6R1/6N1/5kp1/4p3/4K1Q1/8/8 w - - 0 1)

Schiffert, Gyorgy

Magyar Sakkvilag, 1927

8/6R1/6N1/5kp1/4p3/4K1Q1/8/8

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qe5#
    • 1...Kf6
      • 2.Qe5#
    • 1...g4
      • 2.Qe5#
  • Tries
    • 1.Kd2?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kf6
        • 2.Qe5#
      • 1...g4
        • 2.Qe5#
      • 1...e3+!
    • 1.Ke2?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kf6
        • 2.Qe5#
      • 1...g4
        • 2.Qe5#
      • 1...e3!
    • 1.Kf2?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kf6
        • 2.Qe5#
      • 1...g4
        • 2.Qe5#
      • 1...e3+!
    • 1.Kd4?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kf6
        • 2.Qe5#
      • 1...g4
        • 2.Qe5#
      • 1...e3!
    • 1.Qh2?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kf6
        • 2.Qe5#
      • 1...g4
        • 2.Qe5#
      • 1...Kg4!
    • 1.Qf4+?
      • 1...Ke6
        • 2.Qe5#
      • 1...gxf4+!
    • 1.Qd6?
      • 1...g4
        • 2.Sh4#
        • 2.Se7#
        • 2.Qe5#
      • 1...Kg4!
    • 1.Qc7?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kf6
        • 2.Qe5#
        • 2.Qf7#
      • 1...g4
        • 2.Qe5#
      • 1...Kg4!
    • 1.Qb8?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kf6
        • 2.Qe5#
      • 1...g4
        • 2.Qe5#
      • 1...Kg4!
    • 1.Qxg5+?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxg5!
  • Keys
    • 1.Sf8!
      • threat
        • 2.Rf7#
        • 2.Qxg5#
      • 1...Kf6
        • 2.Qxg5#
      • 1...g4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAR1(B)
    • K(b);P-FLIGHT::QAB1(B)
    • P(c);SBLOCK::QAR1(B)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
        • K(b);P-FLIGHT::QAB1(B)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
        • K(b);P-FLIGHT::QAB1(B)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
        • K(b);P-FLIGHT::QAB1(B)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
        • K(b);P-FLIGHT::QAB1(B)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
        • K(b);P-FLIGHT::QAB1(B)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • P(c);CHECK,XQ(B)
    • Try
      • Q(B);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
        • K(b);P-FLIGHT::QAB1(B)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK,XP(c)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P-FLIGHT::QAB1(B),XP(c)
      • P(c);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).