MESON Chess Problem Database

Problem Display
PID: 101174 (r1r1nQ2/nbp4q/5bN1/1p2pk2/6R1/3P2pB/5B2/K4R2 w - - 0 1)

Pape, Edouard

Good Companions (December), 1916

r1r1nQ2/nbp4q/5bN1/1p2pk2/6R1/3P2pB/5B2/K4R2

#2

8 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg8
      • 2.Rxg3#
    • 1...Qd7
      • 2.Rxg3#
    • 1...Qe7
      • 2.Rxg3#
    • 1...Qf7
      • 2.Rxg3#
    • 1...Qg7
      • 2.Rxg3#
  • Tries
    • 1.Be3+?
      • 1...Bf3
        • 2.Rg5#
      • 1...Ke6!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Se7#
      • 1...Sc6+
        • 2.Ba7#
      • 1...e4+
        • 2.Bd4#
      • 1...Qxg6
        • 2.Qd7#
      • 1...Qxh3
        • 2.Qd7#
      • 1...Qxf7
        • 2.Rxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(i);N_GUARD::B(E)+R(F),XP(a)
    • Q(i);N_GUARD,N_SPINB(e)::B(E)+R(F),XP(a)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • B(g);N_SPINB(e),P_SPINB(g)::B(E)+R(F),DCHECK
      • Refutation
        • K(d);N_SPINB(e),S_FLIGHT
  • Actual
    • Q(H);
    • Threat
      • S(G)
    • Vars
      • S(f);CHECK,S_CUTB(g)::R(B)+B(C)
      • P(c);CHECK,S_CUTB(g)::R(B)+B(C)
      • Q(i);N_GUARD,XS(G)::QAB(H)
      • Q(i);N_GUARD,XB(E)::QAB(H)
      • Q(i);N_GUARD,N_SPINB(e),XQ(H)::B(E)+R(F),XP(a)
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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).