MESON Chess Problem Database

Problem Display
PID: 142955 (2B5/2P1pr1q/NRPk1b1R/4np2/4P1p1/1b1pNp2/7Q/K7 w - - 0 1)

Lepage, Roger

diagrammes, 1973

2B5/2P1pr1q/NRPk1b1R/4np2/4P1p1/1b1pNp2/7Q/K7

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qg8
      • 2.Sxf5#
    • 1...Qxh6
      • 2.Sxf5#
    • 1...Qg7
      • 2.Sxf5#
    • 1...Qh8
      • 2.Sxf5#
    • 1...Bd1
      • 2.Sc4#
    • 1...Bc2
      • 2.Sc4#
    • 1...Ba4
      • 2.Sc4#
    • 1...Bc4
      • 2.Sxc4#
  • Tries
    • 1.Bd7?
      • threat
        • 2.c8S#
      • 1...Qg8
        • 2.Sxf5#
      • 1...Qh8
        • 2.Sxf5#
      • 1...Rf8!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qa3#
      • 1...Sxc6
        • 2.e5#
      • 1...Sd7
        • 2.cxd7#
      • 1...Sc4
        • 2.Qd4#
      • 1...Sg6
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(k);N_GUARD::S(C),XP(f)
    • Q(k);N_GUARD,N_SPINB(h),XR(H)::S(C),XP(f)
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
  • Tries
    • Try
      • B(J);
      • Threat
        • P=S
      • Vars
        • Q(k);N_GUARD::S(C),XP(f)
      • Refutation
        • R(j);
  • Actual
    • Q(B);N_PINS(e)
    • Threat
      • QAB(B)
    • Vars
      • S(e);OGATE,P_PINQ(B),P_SPINS(e),XP(G)::P(D)
      • S(e);OGATE,P_PINQ(B)::R(F)+P(G),XS(e)
      • S(e);P_PINQ(B),S_CUTB(a)::QAR2(B)
      • S(e);N_SPINB(h),P_PINQ(B),S_CUTQ(k)::S(C),XP(f)
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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).