MESON Chess Problem Database

Problem Display
PID: 119950 (4Q2n/4Np2/6P1/K2N2pr/p2pkPp1/3p4/3r1nPP/8 w - - 0 1)

Dunka, Gyorgy Jusztin

Alkotmany, 1912

4Q2n/4Np2/6P1/K2N2pr/p2pkPp1/3p4/3r1nPP/8

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sf6+?
      • 1...Ke3
        • 2.Sed5#
      • 1...Kxf4!
    • 1.Qd7?
      • threat
        • 2.Qf5#
      • 1...fxg6
        • 2.Qe6#
      • 1...f5
        • 2.Qxf5#
        • 2.Qe6#
      • 1...gxf4!
    • 1.Qxf7?
      • threat
        • 2.Qe6#
        • 2.Qf5#
      • 1...Sxg6
        • 2.Qxg6#
        • 2.Qf5#
      • 1...gxf4
        • 2.Qxf4#
      • 1...Sxf7!
    • 1.Qc8?
      • threat
        • 2.Qf5#
      • 1...fxg6
        • 2.Qe6#
      • 1...f5
        • 2.Qxf5#
        • 2.Qe6#
      • 1...gxf4!
  • Keys
    • 1.Se3!
      • threat
        • 2.S7d5#
      • 1...gxf4+
        • 2.S7f5#
      • 1...Kxe3
        • 2.Sd5#
      • 1...Kxf4
        • 2.S7d5#
      • 1...Sxg6
        • 2.Sxg6#
      • 1...dxe3
        • 2.Qxa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR(H)+S(G),DCHECK
      • Refutation
        • K(f);P-FLIGHT,XP(C)
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • P(j);N_GUARD,XP(F)::QAR2(H)
      • Refutation
        • P(h);P_PINS(E),XP(C)
    • Try
      • Q(H);XP(j)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);OGATE,P_PINS(E),XP(C)::QAR1(H),XP(h)
      • Refutation
        • S(k);XQ(H)
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • P(j);N_GUARD,XP(F)::QAR2(H)
      • Refutation
        • P(h);P_PINS(E),XP(C)
  • Actual
    • S(E);
    • Threat
      • QAR(H)+S(G)
    • Vars
      • P(h);CHECK,SBLOCK,XP(C)::QAR(H)+S(G)
      • K(f);P-FLIGHT,XS(E)::QAR(H)+S(G),DCHECK
      • K(f);P-FLIGHT,XP(C)::S(G)
      • S(k);XP(F)::QAR(H)+S(G),XS(k)
      • P(e);OGATEB,SBLOCK,XS(E)::QAR(H),XP(d)
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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).