MESON Chess Problem Database

Problem Display
PID: 241879 (8/8/7K/7n/7k/5B1n/4N2Q/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1931

8/8/7K/7n/7k/5B1n/4N2Q/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.Qxg3#
    • 1...Sf4
      • 2.Qg3#
    • 1...Sf6
      • 2.Qg3#
    • 1...Sg7
      • 2.Qg3#
  • Tries
    • 1.Kg6?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Sf4+!
    • 1.Bh1?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kg4!
    • 1.Be4?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kg4!
    • 1.Bg4?
      • threat
        • 2.Qxh3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Kxg4!
    • 1.Bd5?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kg4!
    • 1.Bc6?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kg4!
    • 1.Bb7?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kg4!
    • 1.Ba8?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#
      • 1...Kg4!
    • 1.Qf2+?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sxf2!
    • 1.Qg2?
      • threat
        • 2.Qg4#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sf2!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Qxh3#
      • 1...Kg4
        • 2.Qxh3#
      • 1...Sf4
        • 2.Qg3#

FEATURES

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