MESON Chess Problem Database

Problem Display
PID: 146256 (2q1b2b/8/2p1P3/2P1kPQ1/rp6/2rRN2K/3n1N1n/B7 w - - 0 1)

Goldschmidt, Ervin

L'Echiquier, 1928

2q1b2b/8/2p1P3/2P1kPQ1/rp6/2rRN2K/3n1N1n/B7

#2

9 + 10

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Bf6
      • 2.Qg3#
    • 1...Sb1
      • 2.Sc4#
    • 1...Sdf1
      • 2.Sc4#
    • 1...Sb3
      • 2.Sc4#
    • 1...Sdf3
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Se4
      • 2.Sc4#
    • 1...Shf1
      • 2.Seg4#
    • 1...Shf3
      • 2.Seg4#
    • 1...Sg4
      • 2.Sexg4#
  • Tries
    • 1.Qg7+?
      • 1...Kf4
        • 2.Qg3#
      • 1...Bxg7!
  • Keys
    • 1.Rd6!
      • threat
        • 2.f6#
      • 1...Qxe6
        • 2.fxe6#
      • 1...Bg6
        • 2.fxg6#
      • 1...Bf6
        • 2.Qg3#
      • 1...Sdf3
        • 2.Sc4#
      • 1...Se4
        • 2.Sd3#
      • 1...Shf3
        • 2.Seg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(j);SBLOCK::QAB(H)
    • S(a);N_GUARD::S(D)
    • S(a);N_GUARD::S(D),XS(a)
    • S(b);N_GUARD::S(D)
    • S(b);N_GUARD::S(D),XS(b)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(f);N_SPINR(c),S_FLIGHT::QAB1(H)
      • Refutation
        • B(j);XQ(H)
  • Actual
    • R(C);P_SPINS(D)
    • Threat
      • QAR(H)+P(G)
    • Vars
      • Q(h);OGATE,P_PINP(G),XP(I)::QAR(H)+P(G),XQ(h)
      • B(i);OGATE::QAR(H)+P(G),XB(i)
      • B(j);SBLOCK::QAB(H)
      • S(a);N_PINS(D)::S(D)
      • S(a);SBLOCK::S(B)
      • S(b);N_PINS(D)::S(D)
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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).