MESON Chess Problem Database

Problem Display
PID: 257546 (4k2r/rp3pb1/1RNpPR1p/3N3K/8/8/2Q5/1B6 w k - 0 1)

Labai, Zoltan

Svitek, Miroslav

Phenix, 2021

4k2r/rp3pb1/1RNpPR1p/3N3K/8/8/2Q5/1B6

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rf8
      • 2.Sc7#
    • 1...Bf8
      • 2.Sc7#
    • 1...bxc6
      • 2.Rb8#
    • 1...0-0
      • 2.Qh7#
  • Tries
    • 1.Sxa7?
      • threat
        • 2.Qc8#
      • 1...Kd8
        • 2.Qc8#
      • 1...Kf8
        • 2.Qc8#
      • 1...0-0
        • 2.Qh7#
      • 1...Bxf6!
    • 1.Sce7?
      • threat
        • 2.Qc8#
      • 1...Kd8
        • 2.Qc8#
      • 1...Kf8
        • 2.Qc8#
      • 1...Ra8!
    • 1.Rxf7?
      • threat
        • 2.Sc7#
      • 1...bxc6
        • 2.Rb8#
      • 1...Ra5!
    • 1.exf7+?
      • 1...Kd7
        • 2.Qf5#
      • 1...Kf8!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qxf7#
      • 1...fxg6+
        • 2.Bxg6#
      • 1...Kf8
        • 2.Qxf7#
      • 1...0-0
        • 2.Qh7#
      • 1...bxc6
        • 2.Rb8#
      • 1...Rf8
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(h);SBLOCK::S(C)
    • B(f);SBLOCK::S(C)
    • P(d);OGATE,XS(F)::R(E)
    • K(g);0-0,OGATEB::QAB1(B)
  • Tries
    • Try
      • S(F);XR(c)
      • Threat
        • QAR2(B)
      • Vars
        • K(g);P-FLIGHT::QAR1(B)
        • K(g);P-FLIGHT,P_SPINP(e)::QAR(B)
        • K(g);0-0,OGATEB::QAB1(B)
      • Refutation
        • B(f);XR(H)
    • Try
      • S(F);
      • Threat
        • QAR2(B)
      • Vars
        • K(g);P-FLIGHT::QAR1(B)
        • K(g);P-FLIGHT,P_SPINP(e)::QAR(B)
      • Refutation
        • R(c);
    • Try
      • R(H);XP(e)
      • Threat
        • S(C)
      • Vars
        • P(d);OGATE,XS(F)::R(E)
      • Refutation
        • R(c);P_PINS(C)
    • Try
      • P(G);CHECK,XP(e)
      • Vars
        • K(g);N_GUARD,S_FLIGHT::QAB(B)
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • Q(B);P_PINP(e)
    • Threat
      • QAB1(B),XP(e)
    • Vars
      • P(e);CHECK,N_SPINP(e),OGATE,XQ(B)::B(A),XP(e)
      • K(g);P-FLIGHT::QAR1(B),XP(e)
      • K(g);0-0,N_SPINP(e),OGATEB,P_SPINB(f)::QAB1(B)
      • P(d);OGATE,XS(F)::R(E)
      • R(h);SBLOCK::S(C)
HTML5 logo

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).