MESON Chess Problem Database

Problem Display
PID: 227710 (8/8/N1Q5/k7/2p5/8/1P1p4/3K4 w - - 0 1)

Ballo, Gyorgy

Uj Nemezdek, 1926

8/8/N1Q5/k7/2p5/8/1P1p4/3K4

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.b4#
  • Tries
    • 1.Sc5?
      • 1...Kb4
        • 2.Qb6#
      • 1...c3!
    • 1.Qb7?
      • 1...Ka4
        • 2.Qb4#
      • 1...c3!
    • 1.Qc5+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Kxa6!
    • 1.Qb6+?
      • 1...Ka4
        • 2.Sc5#
        • 2.Qb4#
      • 1...Kxb6!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Qb5#
      • 1...Kb4
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(b);N_GUARD::P(B)
  • Tries
    • Try
      • S(C);
      • Vars
        • K(c);S_FLIGHT::QAR2(D)
      • Refutation
        • P(b);
    • Try
      • Q(D);
      • Vars
        • K(c);P-FLIGHT::QAR1(D)
      • Refutation
        • P(b);
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(D)
      • Refutation
        • K(c);P-FLIGHT,XS(C)
    • Try
      • Q(D);CHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(D)
  • Actual
    • S(C);
    • Threat
      • QAR1(D)
    • Vars
      • K(c);S_FLIGHT::QAR1(D)
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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).