MESON Chess Problem Database

Problem Display
PID: 181845 (8/2p1KN2/8/3k4/1Q6/5P2/8/8 w - - 0 1)

Leal, Sabastiao

Diario Illustrado, 1905

8/2p1KN2/8/3k4/1Q6/5P2/8/8

#2

4 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qe4#
  • Tries
    • 1.Kd7?
      • 1...c5
        • 2.Qe4#
      • 1...c6!
    • 1.Sd8?
      • 1...Ke5
        • 2.Qe4#
      • 1...c5
        • 2.Qe4#
      • 1...c6!
  • Keys
    • 1.Se5!
      • 1...Kxe5
        • 2.Qe4#
      • 1...c6
        • 2.Qd6#
      • 1...c5
        • 2.Qe4#

This anticipates 170474(1953)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAB1(B)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • P(b);
  • Actual
    • S(D);
    • Vars
      • K(a);P-FLIGHT,XS(D)::QAR1(B)
      • P(b);N_GUARD::QAR1(B)
      • P(b);SBLOCK::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).