MESON Chess Problem Database

Problem Display
PID: 142748 (4R1b1/1Np5/3pp1B1/K1Q1Brr1/1N2k1P1/4Pn2/6P1/8 w - - 0 1)

Lepage, Roger

diagrammes, 1973

4R1b1/1Np5/3pp1B1/K1Q1Brr1/1N2k1P1/4Pn2/6P1/8

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qd4#
    • 1...Sg1
      • 2.Qd4#
    • 1...Sd2
      • 2.Qd4#
    • 1...Sh2
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sh4
      • 2.Qd4#
    • 1...Sxe5
      • 2.Qd4#
    • 1...c6
      • 2.Sxd6#
  • Keys
    • 1.Bf4!
      • threat
        • 2.Qd5#
      • 1...Rxg6
        • 2.Qxf5#
      • 1...dxc5
        • 2.Sxc5#
      • 1...Se5
        • 2.Qd4#
      • 1...d5
        • 2.Qc2#
        • 2.Qxd5#
      • 1...e5
        • 2.Qc2#
      • 1...c6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::QAR1(F)
    • S(a);N_GUARD::QAR1(F),XS(a)
    • S(a);N_GUARD,XB(G)::QAR1(F)
    • P(g);N_GUARD::S(I),XP(e)
  • Actual
    • B(G);P_PINP(f),P_SPINQ(F)
    • Threat
      • QAB1(F)
    • Vars
      • R(d);N_GUARD,N_SPINR(c),XB(H)::QAB1(F),XR(c)
      • P(e);XQ(F)::S(I),XP(e)
      • S(a);N_PINQ(F),N_SPINP(f)::QAR1(F)
      • P(f);N_PINQ(F)::QAB(F)
      • P(g);N_GUARD::S(I),XP(e)
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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).