MESON Chess Problem Database

Problem Display
PID: 189595 (5K2/3P1R2/2Q3Np/2pN3r/4k2P/b1Pp2nq/b2Pn3/8 w - - 0 1)

Dunka, Gyorgy Jusztin

Magyar Sakkvilag, 1911

5K2/3P1R2/2Q3Np/2pN3r/4k2P/b1Pp2nq/b2Pn3/8

#2

9 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Sf6#
    • 1...Rf5
      • 2.Sf6#
    • 1...Sc1
      • 2.Rf4#
    • 1...Sg1
      • 2.Rf4#
    • 1...Sxc3
      • 2.Rf4#
    • 1...Sd4
      • 2.Rf4#
    • 1...Sf4
      • 2.Rxf4#
    • 1...Sf5
      • 2.Sf6#
  • Tries
    • 1.Qe6+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Qxe6!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qe6#
      • 1...Qxf5+
        • 2.Sf6#
      • 1...Rxf5+
        • 2.Sf6#
      • 1...c4+
        • 2.Sde7#
      • 1...Kxf5
        • 2.Se3#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Sxc3
        • 2.Rf4#
      • 1...Sxf5
        • 2.Sf6#
      • 1...Sf4
        • 2.Rxf4#
      • 1...Sd4
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(f);P_PINR(H),SBLOCK::QAB(E)+S(D),DCHECK
    • R(i);P_PINR(H),SBLOCK::QAB(E)+S(D),DCHECK
    • S(b);N_GUARD::R1(H)
    • S(b);N_GUARD,XP(B)::R1(H)
    • S(b);N_GUARD::R1(H),XS(b)
    • S(e);SBLOCK::QAB(E)+S(D),DCHECK
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAR1(E),XR(i)
      • Refutation
        • Q(f);XQ(E)
  • Actual
    • R(H);
    • Threat
      • QAR2(E)
    • Vars
      • Q(f);CHECK,SBLOCK,XR(H)::QAB(E)+S(D),DCHECK
      • R(i);CHECK,SBLOCK,XR(H)::QAB(E)+S(D),DCHECK
      • P(h);CHECK,S_CUTB(a)::QAB(E)+S(D)
      • K(g);S_FLIGHT,XR(H)::S(D)
      • B(a);OGATE,P_SPINB(a),XS(D)::QAB1(E),XB(a)
      • S(b);N_GUARD,XP(B)::R1(H)
      • S(e);SBLOCK,XR(H)::QAB(E)+S(D),DCHECK
      • S(b);N_GUARD::R1(H),XS(b)
      • S(b);N_GUARD::R1(H)
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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).