MESON Chess Problem Database

Problem Display
PID: 73176 (7n/3b1NKB/4pp1B/3p3Q/3P2Rb/4Nkr1/4prpR/5q1n w - - 0 1)

Herpai, S Ferenc

1st Prize, Arbejder Magasinet, 1936

7n/3b1NKB/4pp1B/3p3Q/3P2Rb/4Nkr1/4prpR/5q1n

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rh3
      • 2.Rgxg2#
    • 1...Rxg4+
      • 2.Qxg4#
    • 1...f5
      • 2.Se5#
  • Tries
    • 1.Rg6+?
      • 1...Rg4
        • 2.Qxg4#
      • 1...Ke4!
  • Keys
    • 1.Rh3!
      • threat
        • 2.Rgxg3#
      • 1...Rxh3
        • 2.Rxg2#
      • 1...Bg5
        • 2.Re4#
      • 1...Sg6
        • 2.Rgxh4#
      • 1...f5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(g);N_PINR(D)::QAB(E)+R(D),XP(e)
    • R(g);CHECK,OGATE,P_SPINR(g),XR(D)::QAB1(E),XR(g)
    • P(k);N_GUARD::S(G)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAB1(E),XR(g)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • R(A);P_PINR(g)
    • Threat
      • QAB(E)+R(D),DCHECK,XR(g)
    • Vars
      • R(g);N_PINR(D),N_SPINR(g),XR(A)::QAB(E)+R(D),XP(e)
      • B(h);N_PINR(D)::QAB(E)+R(D)
      • S(m);N_PINR(D)::QAB(E)+R(D),XB(h)
      • P(k);N_GUARD::S(G)
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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).