MESON Chess Problem Database

Problem Display
PID: 227810 (8/1p6/1K6/2p5/1k6/8/Q7/1N6 w - - 0 1)

Ballo, Gyorgy

Uj Nemezdek, 1926

8/1p6/1K6/2p5/1k6/8/Q7/1N6

#2

3 + 3

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qa3#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qb3#
        • 2.Qa5#
      • 1...c4
        • 2.Qa5#
      • 1...Kc3!
    • 1.Qe6?
      • 1...Ka4
        • 2.Qc4#
      • 1...c4!
    • 1.Qf7?
      • 1...Ka4
        • 2.Qc4#
      • 1...c4!
    • 1.Qg8?
      • 1...Ka4
        • 2.Qc4#
      • 1...c4!
    • 1.Qb2+?
      • 1...Ka4
        • 2.Sc3#
        • 2.Qa3#
        • 2.Qb5#
      • 1...Kc4!
  • Keys
    • 1.Qd5!
      • 1...Ka4
        • 2.Qc4#
      • 1...c4
        • 2.Qb5#

This anticipates 23461(1988)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAB1(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::QAR2(B)
      • P(b);OGATE::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).