MESON Chess Problem Database

Problem Display
PID: 194874 (2K3B1/8/5PQ1/2p1k3/5b1P/2P5/2P1nR2/7n w - - 0 1)

Jonsson, Ernst Uno Fredrik

Kikaren, 1918

2K3B1/8/5PQ1/2p1k3/5b1P/2P5/2P1nR2/7n

#2

8 + 5

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qf5+?
      • 1...Kd6
        • 2.Qe6#
        • 2.Qd5#
      • 1...Kxf5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Rxe2#
      • 1...Kd6
        • 2.Qe6#
      • 1...Kxf6
        • 2.Qg5#
      • 1...Sxc3
        • 2.Qxf4#
      • 1...Sd4
        • 2.Qxf4#

This anticipates 154518(1932), 190303(1932)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • K(e);P-FLIGHT,P_SPINB(c),XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • K(e);P-FLIGHT,P_SPINB(c)::R(B),XS(b)
      • K(e);S_FLIGHT::QAR1(F)
      • K(e);P_SPINB(c),S_FLIGHT,XP(E)::QAB1(F)
      • S(b);N_GUARD,XP(C)::QAB1(F),XB(c)
      • S(b);N_GUARD::QAB1(F),XB(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).