MESON Chess Problem Database

Problem Display
PID: 244126 (2n3Q1/6pp/7k/7B/7K/8/8/8 w - - 0 1)

Benedek, Attila

Source?, 0000

2n3Q1/6pp/7k/7B/7K/8/8/8

#2

3 + 4

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...g5+
      • 2.Qxg5#
    • 1...g6
      • 2.Qf8#
  • Tries
    • 1.Qd5?
      • threat
        • 2.Qg5#
      • 1...g5+
        • 2.Qxg5#
      • 1...g6!
    • 1.Qxc8?
      • 1...g6
        • 2.Qf8#
      • 1...g5+!
    • 1.Qd8?
      • threat
        • 2.Qg5#
      • 1...g5+
        • 2.Qxg5#
      • 1...g6
        • 2.Qf8#
      • 1...Se7!
  • Keys
    • 1.Bg6!
      • threat
        • 2.Qxh7#
      • 1...Kxg6
        • 2.Qe6#
      • 1...hxg6
        • 2.Qh8#

Anticipated by 250770(1930)

This anticipates 12062(1974)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(b);CHECK,OGATE::QAB1(C),XP(b)
    • P(b);OGATEB::QAB(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(b);CHECK::QAB1(C),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(C);XS(d)
      • Vars
        • P(b);OGATEB::QAB(C)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(b);CHECK::QAB1(C),XP(b)
        • P(b);OGATEB::QAB(C)
      • Refutation
        • S(d);
  • Actual
    • B(B);
    • Threat
      • QAR1(C),XP(c)
    • Vars
      • K(a);OGATEB,P-FLIGHT,P_SPINP(b),XB(B)::QAR2(C)
      • P(c);OGATEB,SBLOCK,XB(B)::QAR2(C)
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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).