MESON Chess Problem Database

Problem Display
PID: 149008 (b3Q3/3p1N2/nrp2p2/8/2Bk1N2/1Pp5/2n3R1/7K w - - 0 1)

Guidelli, Giorgio

Good Companions (May), 1918

b3Q3/3p1N2/nrp2p2/8/2Bk1N2/1Pp5/2n3R1/7K

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Se2#
    • 1...c5
      • 2.Se2#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Qe4+?
      • 1...Kc5
        • 2.Sd3#
      • 1...Kxe4!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Sd3#
      • 1...c5+
        • 2.Sd5#
      • 1...Kc5
        • 2.Sd3#
      • 1...Se3
        • 2.Se6#
      • 1...Sc5
        • 2.Se2#
      • 1...f5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(d);SBLOCK::S(E)
    • P(f);P_PINR(B),SBLOCK::S(E)
    • P(g);N_GUARD::QAB1(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);S_FLIGHT::S(E)
      • Refutation
        • K(c);P-FLIGHT,XQ(G)
  • Actual
    • R(B);
    • Threat
      • R(B)+S(E)
    • Vars
      • P(f);CHECK,SBLOCK::R(B)+S(E)
      • K(c);S_FLIGHT::S(E)
      • S(a);SBLOCK::R(B)+S(E),DCHECK
      • S(d);SBLOCK::R(B)+S(E),DCHECK
      • P(g);N_GUARD::QAB1(G)
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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).