MESON Chess Problem Database

Problem Display
PID: 25877 (2Q1R3/8/2NP4/2r1N1P1/R1P1kB2/2p1P3/2K5/8 w - - 0 1)

Retter, Yosef

2nd HM., McWilliam MT, 2000

2Q1R3/8/2NP4/2r1N1P1/R1P1kB2/2p1P3/2K5/8

#2

11 + 3

56 The Problemist 2001

SOLUTION

  • SOUND
  • Tries
    • 1.Se7?
      • threat
        • 2.Qf5#
      • 1...Rxc8
        • 2.c5#
      • 1...Rxe5!
    • 1.Qh3?
      • threat
        • 2.Qh7#
      • 1...Rxe5
        • 2.Rxe5#
      • 1...Rxc4!
    • 1.Qe6?
      • threat
        • 2.Qg6#
      • 1...Rxc4
        • 2.Rxc4#
      • 1...Rxe5!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qh7#
      • 1...Kf5
        • 2.Sd4#
        • 2.Qh7#
      • 1...Rxc4
        • 2.Se7#
      • 1...Rxe5
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(H);
      • Threat
        • QAB1(J)
      • Vars
        • R(c);OGATE,XQ(J)::R(C)+P(D)
      • Refutation
        • R(c);XS(F)
    • Try
      • Q(J);
      • Threat
        • QAB(J)
      • Vars
        • R(c);OGATE,P_SPINR(c),XS(F)::R1(K),XR(c)
      • Refutation
        • R(c);P_SPINR(c),XP(D)
    • Try
      • Q(J);
      • Threat
        • QAB(J)
      • Vars
        • R(c);OGATE,P_SPINR(c),XP(D)::R(C),XR(c)
      • Refutation
        • R(c);P_SPINR(c),XS(F)
  • Actual
    • Q(J);
    • Threat
      • QAB(J)
    • Vars
      • R(c);N_GUARD,P_SPINR(c),XP(D)::QAB(J)+S(H)
      • R(c);N_GUARD,P_SPINR(c),XS(F)::QAB(J)+S(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).