MESON Chess Problem Database

Problem Display
PID: 187968 (n4K2/2p5/3pN3/1Ppkr3/8/2PPp3/6nQ/8 w - - 0 1)

Nagy, Odon

Pesti Naplo, 1910

n4K2/2p5/3pN3/1Ppkr3/8/2PPp3/6nQ/8

#2

6 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Sf4#
    • 1...Sf4
      • 2.Sxf4#
    • 1...Sh4
      • 2.Sf4#
    • 1...Sb6
      • 2.Sxc7#
  • Tries
    • 1.Qxg2+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Kxe6!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qc4#
      • 1...Rf5+
        • 2.Qxf5#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Rxe6
        • 2.c4#
      • 1...Sxf4
        • 2.Sxf4#
      • 1...Re4
        • 2.Qxe4#
      • 1...Rg5
        • 2.Qe4#
      • 1...Rh5
        • 2.Qe4#
      • 1...Sb6
        • 2.Sxc7#
      • 1...c4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::S(E)
    • S(a);N_GUARD::S(E),XS(a)
    • S(h);N_GUARD::S(E),XP(g)
  • Tries
    • Try
      • Q(A);CHECK,XS(a)
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(A),XR(e)
      • Refutation
        • K(d);S_FLIGHT,XS(E)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • R(e);CHECK,OGATEB::QAR2(A),XR(e)
      • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(A)
      • R(e);SBLOCK,XS(E)::P(B)
      • S(a);XQ(A)::S(E),XS(a)
      • R(e);N_GUARD::QAB1(A),XR(e)
      • R(e);N_GUARD::QAB1(A)
      • S(h);N_GUARD::S(E),XP(g)
      • P(c);::QAB1(A),XP(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).