MESON Chess Problem Database

Problem Display
PID: 229171 (2K4R/8/8/8/8/2Q3PN/R1q4k/4nBNr w - - 0 1)

Regos, Imre

Nepszava, 1926

2K4R/8/8/8/8/2Q3PN/R1q4k/4nBNr

#2

8 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg1
      • 2.Sf4#
      • 2.Sg5#
  • Tries
    • 1.Rxc2+?
      • 1...Sg2
        • 2.Rxg2#
      • 1...Sxc2!
    • 1.Qxc2+?
      • 1...Kxg3
        • 2.Qg6#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sxc2!
  • Keys
    • 1.Qc7!
      • threat
        • 2.g4#
      • 1...Rxg1
        • 2.Sg5#
      • 1...Sg2
        • 2.Sf3#
      • 1...Sd3
        • 2.Sf3#
      • 1...Sf3
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK,N_SPINQ(D),XQ(c)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::R1(C),XS(a)
      • Refutation
        • S(a);XR(C)
    • Try
      • Q(D);CHECK,N_SPINQ(D),XQ(c)
      • Vars
        • K(d);S_FLIGHT,XP(E)::QAR(D)
        • S(a);N_GUARD,P_SPINS(a)::QAR1(D),XS(a)
      • Refutation
        • S(a);P_SPINS(a),XQ(D)
  • Actual
    • Q(D);
    • Threat
      • QAB(D)+P(E)
    • Vars
      • R(b);SBLOCK,XS(B)::R(H)+S(F)
      • S(a);N_GUARD,N_SPINQ(c)::S(B)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
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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).