MESON Chess Problem Database

Problem Display
PID: 187951 (8/Q3N3/8/1k6/6p1/2P5/Pn1N2K1/8 w - - 0 1)

Gold, Zsigmund

Pesti Naplo, 1910

8/Q3N3/8/1k6/6p1/2P5/Pn1N2K1/8

#2

6 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.a4#
    • 1...Sd3
      • 2.a4#
    • 1...Sc4
      • 2.a4#
  • Tries
    • 1.Kg3?
      • 1...Sd1
        • 2.a4#
      • 1...Sd3
        • 2.a4#
      • 1...Sc4
        • 2.a4#
      • 1...Sa4!
    • 1.Sb1?
      • threat
        • 2.Sa3#
      • 1...Sc4
        • 2.a4#
      • 1...Kc4!
    • 1.Sc4?
      • threat
        • 2.Sa3#
        • 2.Sd6#
      • 1...Sxc4
        • 2.a4#
      • 1...Kxc4!
    • 1.Qb6+?
      • 1...Ka4
        • 2.Qb4#
        • 2.Qa6#
      • 1...Kxb6!
    • 1.Qa6+?
      • 1...Kc5
        • 2.Sb3#
        • 2.Se4#
        • 2.Qc6#
      • 1...Kxa6!
    • 1.Qb7+?
      • 1...Ka4
        • 2.Qa6#
        • 2.Qb4#
      • 1...Kc5
        • 2.Qc6#
        • 2.Qb4#
      • 1...Ka5!
    • 1.a3?
      • 1...Sa4
        • 2.c4#
      • 1...Sd1
        • 2.a4#
        • 2.c4#
      • 1...Sd3
        • 2.a4#
        • 2.c4#
      • 1...Sc4
        • 2.a4#
      • 1...g3!
    • 1.c4+?
      • 1...Kb4
        • 2.Sd5#
      • 1...Sxc4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sd6#
      • 1...Kc4
        • 2.Qa6#
      • 1...Sc4
        • 2.a4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::P(A)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • S(a);N_GUARD::P(A)
      • Refutation
        • S(a);
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • S(a);N_GUARD,SBLOCK::P(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD,SBLOCK,XS(B)::P(A)
      • Refutation
        • K(c);S_FLIGHT,XS(B)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(c);P-FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(A);
      • Vars
        • S(a);N_GUARD::P(D)
        • S(a);N_GUARD::P(A)
      • Refutation
        • P(b);
    • Try
      • P(D);CHECK
      • Vars
        • K(c);P-FLIGHT::S(F)
      • Refutation
        • S(a);XP(D)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(c);S_FLIGHT::QAB(E)
      • S(a);N_GUARD,SBLOCK::P(A)
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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).