MESON Chess Problem Database

Problem Display
PID: 225868 (8/3p4/4RNnQ/4pk2/2P5/3P4/5K2/8 w - - 0 1)

Riczu, Lajos

Praca, 1959

8/3p4/4RNnQ/4pk2/2P5/3P4/5K2/8

#2

6 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qh3+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Kg5!
    • 1.Qh5+?
      • 1...Kf4
        • 2.Sd5#
        • 2.Qg4#
      • 1...Kxe6!
    • 1.Qxg6+?
      • 1...Kf4
        • 2.Sd5#
        • 2.Sh5#
        • 2.Qg4#
      • 1...Kxe6
        • 2.Sd5#
        • 2.Sg8#
      • 1...Kxg6!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qxg6#
      • 1...Kg4
        • 2.Se3#
      • 1...Kxe6
        • 2.Qxg6#
      • 1...dxe6
        • 2.Qh5#
      • 1...Sf4
        • 2.Se3#
      • 1...Sh4
        • 2.Se3#
      • 1...Se7
        • 2.Se3#
      • 1...Sf8
        • 2.Se3#
      • 1...Sh8
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • Q(F);CHECK,XS(c)
      • Refutation
        • K(b);S_FLIGHT,XQ(F)
  • Actual
    • S(E);
    • Threat
      • QAB1(F),XS(c)
    • Vars
      • K(b);S_FLIGHT::S(E)
      • K(b);P_SPINS(c),S_FLIGHT,XR(D)::QAR2(F),XS(c)
      • P(d);SBLOCK,XR(D)::QAR2(F)
      • S(c);::S(E)
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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).