MESON Chess Problem Database

Problem Display
PID: 270480 (B7/5N1p/1b1p1Q2/P1k5/Kp4p1/1Ppr3q/5P2/8 w - - 0 1)

Manskopf, Johannes Karl Alvin Georg

Die Schwalbe, 1931

B7/5N1p/1b1p1Q2/P1k5/Kp4p1/1Ppr3q/5P2/8

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Qxd6#
    • 1...Rf3
      • 2.Qxd6#
    • 1...Rg3
      • 2.Qxd6#
    • 1...d5
      • 2.Qxb6#
  • Tries
    • 1.Qg5+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Rd5
        • 2.Qxd5#
      • 1...d5!
    • 1.Qf5+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Rd5
        • 2.Qxd5#
      • 1...d5!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sd7#
      • 1...Kd4
        • 2.Sd7#
        • 2.Qxd6#
      • 1...dxe5
        • 2.Qxb6#
      • 1...g3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::QAB1(E),XP(h)
    • P(h);OGATE::QAB1(E),XB(g)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(f);S_CUTR(b),S_FLIGHT::QAR1(E)
        • R(b);N_GUARD,P_SPINR(b)::QAR1(E),XR(b)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • Q(E);CHECK
      • Vars
        • K(f);S_CUTR(b),S_FLIGHT::QAR1(E)
        • R(b);N_GUARD,P_SPINR(b)::QAR1(E),XR(b)
      • Refutation
        • P(h);P_SPINP(h)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • P(h);OGATE,XS(F)::QAB1(E),XB(g)
      • P(e);S_CUTQ(c)::S(F),XR(b)
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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).