MESON Chess Problem Database

Problem Display
PID: 261955 (q2N1BbK/2p5/5nR1/Qp2k3/1r2P2N/bB1R2P1/5P2/8 w - - 0 1)

Knuppert, Hugo

Problemnoter, 1957

q2N1BbK/2p5/5nR1/Qp2k3/1r2P2N/bB1R2P1/5P2/8

#2

11 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qxc7#
    • 1...Rxe4
      • 2.Rg5#
    • 1...Sxe4
      • 2.f4#
  • Tries
    • 1.Sc6+?
      • 1...Kxe4
        • 2.Re3#
      • 1...Qxc6!
  • Keys
    • 1.Re3!
      • threat
        • 2.Sf3#
      • 1...Kd4
        • 2.Sf3#
      • 1...Qxe4
        • 2.Sc6#
      • 1...Rxe4
        • 2.Qc3#
      • 1...Sxe4
        • 2.Bg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(g);SBLOCK,XP(E)::QAB(G),XP(f)
    • R(b);SBLOCK,XP(E)::R(H)
    • S(e);SBLOCK,XP(E)::P(A)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT,S_CUTQ(g),XP(E)::R1(C)
      • Refutation
        • Q(g);XS(I)
  • Actual
    • R(C);
    • Threat
      • S(F)
    • Vars
      • K(d);N_SPINP(c),S_FLIGHT::S(F)
      • Q(g);N_GUARD,P_SPINQ(g),XP(E)::S(I)
      • R(b);OGATE,P_SPINR(b),XP(E)::QAB(G)
      • S(e);OGATEB,P_SPINS(e),XP(E)::B(J)
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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).