MESON Chess Problem Database

Problem Display
PID: 194258 (3K3B/2R2B1b/7r/3PP2p/3k4/2pN1P1Q/4PP1n/8 w - - 0 1)

Guidelli, Giorgio

Brisbane Courier, 1917

3K3B/2R2B1b/7r/3PP2p/3k4/2pN1P1Q/4PP1n/8

#2

11 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6+
      • 2.exd6#
    • 1...Bxd3
      • 2.e3#
  • Tries
    • 1.Qh4+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Sg4!
    • 1.d6?
      • threat
        • 2.Rc4#
      • 1...Rxd6+
        • 2.exd6#
      • 1...Bxd3
        • 2.e3#
      • 1...Re6!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qa4#
      • 1...Bxd3
        • 2.e3#
      • 1...Rc6
        • 2.dxc6#
      • 1...Ra6
        • 2.e6#
      • 1...Rb6
        • 2.e6#
      • 1...Rd6
        • 2.exd6#
      • 1...Re6
        • 2.dxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(e);CHECK,OGATE::B(K)+P(G),XR(e)
    • B(f);SBLOCK,XS(C)::P(A)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR1(E),XB(f)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • P(F);
      • Threat
        • R1(H)
      • Vars
        • R(e);CHECK,OGATE,XP(F)::B(K)+P(G),XR(e)
        • B(f);SBLOCK,XS(C)::P(A)
      • Refutation
        • R(e);
  • Actual
    • Q(E);
    • Threat
      • QAR(E)
    • Vars
      • B(f);SBLOCK,XS(C)::P(A)
      • R(e);OGATE::QAR(E)+P(F),XR(e)
      • R(e);N_GUARD::B(K)+P(G)
      • R(e);OGATE,P_PINQ(E)::B(K)+P(G),XR(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).