MESON Chess Problem Database

Problem Display
PID: 222931 (8/8/8/4n3/5Q2/8/4K1kp/1R6 w - - 0 1)

Pradignat, Emile Leonard

ABC des Echecs, 1885

8/8/8/4n3/5Q2/8/4K1kp/1R6

#2

3 + 3

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Qf3#
      • 2.Qg4#
    • 1...Sf3
      • 2.Qxf3#
      • 2.Qg4#
    • 1...Sc4
      • 2.Qf3#
      • 2.Qg4#
    • 1...Sg4
      • 2.Qf3#
      • 2.Qxg4#
    • 1...Sc6
      • 2.Qf3#
      • 2.Qg4#
    • 1...Sg6
      • 2.Qf3#
      • 2.Qg4#
    • 1...Sd7
      • 2.Qf3#
      • 2.Qg4#
    • 1...Sf7
      • 2.Qf3#
      • 2.Qg4#
  • Tries
    • 1.Qg5+?
      • 1...Sg4
        • 2.Qxg4#
      • 1...Kh3!
  • Keys
    • 1.Rh1!
      • threat
        • 2.Qxh2#
      • 1...Kxh1
        • 2.Qf1#
      • 1...Kh3
        • 2.Rxh2#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sg4
        • 2.Qf3#

Anticipated by 51060(1880-1881)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR2(C),XS(c)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(A);
    • Threat
      • QAR1(C),XP(b)
    • Vars
      • K(a);S_FLIGHT,XR(A)::QAR2(C)
      • K(a);P_SPINP(b),S_FLIGHT::R1(A),XP(b)
      • S(c);N_GUARD::QAB1(C),XS(c)
      • S(c);N_GUARD::QAB1(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).