MESON Chess Problem Database

Problem Display
PID: 241877 (8/8/7K/7n/7k/4N2b/5P1Q/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1931

8/8/7K/7n/7k/4N2b/5P1Q/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.Qxg3#
      • 2.fxg3#
    • 1...Sf4
      • 2.Qg3#
    • 1...Sf6
      • 2.Qg3#
    • 1...Sg7
      • 2.Qg3#
  • Tries
    • 1.Kg6?
      • 1...Sg3
        • 2.Qxg3#
        • 2.fxg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Sf4+!
    • 1.Sd1?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kg4!
    • 1.Sf1?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kg4!
    • 1.Sc2?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kg4!
    • 1.Sc4?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kg4!
    • 1.Sg4?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kxg4!
    • 1.Sd5?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kg4!
    • 1.Qf4+?
      • 1...Bg4
        • 2.Qxg4#
      • 1...Sxf4!
    • 1.f4?
      • 1...Sxf4
        • 2.Qf2#
      • 1...Sf6
        • 2.Qf2#
      • 1...Sg7
        • 2.Qf2#
      • 1...Sg3!
  • Keys
    • 1.f3!
      • threat
        • 2.Sg2#
        • 2.Sf5#
      • 1...Sg3
        • 2.Sg2#
      • 1...Sf4
        • 2.Sf5#
        • 2.Qf2#
      • 1...Sg7
        • 2.Sg2#
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(c);N_GUARD::QAB1(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • S(c);CHECK
    • Try
      • S(C);
      • Vars
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • K(b);N_SPINB(a),P-FLIGHT
    • Try
      • S(C);
      • Vars
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • K(b);N_SPINB(a),P-FLIGHT
    • Try
      • S(C);
      • Vars
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • K(b);N_SPINB(a),P-FLIGHT
    • Try
      • S(C);
      • Vars
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • K(b);N_SPINB(a),P-FLIGHT
    • Try
      • S(C);
      • Vars
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • K(b);N_SPINB(a),P-FLIGHT,XS(C)
    • Try
      • S(C);
      • Vars
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • K(b);N_SPINB(a),P-FLIGHT
    • Try
      • Q(B);CHECK,N_PINB(a)
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(B),XB(a)
      • Refutation
        • S(c);XQ(B)
    • Try
      • P(A);
      • Vars
        • S(c);N_GUARD,XP(A)::QAB(B)
        • S(c);N_GUARD::QAB(B)
      • Refutation
        • S(c);
  • Actual
    • P(A);
    • Threat
      • DUALS(2)
    • Vars
      • S(c);::S(C)
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).