MESON Chess Problem Database

Problem Display
PID: 231573 (8/8/2pp4/3k4/8/3KQ3/8/8 w - - 0 1)

Torngren, Pehr Hendrik

Eskilstuna Kuriren, 1927

8/8/2pp4/3k4/8/3KQ3/8/8

#2

2 + 3

5454 Near Snap 2021
3713 Snap 2021
6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qe4#
  • Tries
    • 1.Qe2?
      • 1...c5
        • 2.Qe4#
      • 1...Kc5!
    • 1.Qe7?
      • 1...c5
        • 2.Qe4#
      • 1...Kc5!
    • 1.Qe8?
      • 1...c5
        • 2.Qe4#
      • 1...Kc5!
  • Keys
    • 1.Qe1!
      • 1...Kc5
        • 2.Qa5#
      • 1...c5
        • 2.Qe4#

Anticipated by 2562(0000), 23602(1879), 91942(1883), 4790(1891), 135915(1897), 206689(1925)

This anticipates 90303(1930)

This is a version of 231572

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAB1(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::QAR2(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).