MESON Chess Problem Database

Problem Display
PID: 259652 (1N3q2/n4n2/1B1p2N1/1p1k1P2/rRp1p2Q/p7/8/7K w - - 0 1)

Brogi, Giuseppe

Die Schwalbe, 1957

1N3q2/n4n2/1B1p2N1/1p1k1P2/rRp1p2Q/p7/8/7K

#2

7 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Rxb5#
    • 1...Sc8
      • 2.Rxb5#
    • 1...Se5
      • 2.Sf4#
    • 1...c3
      • 2.Qxe4#
    • 1...e3
      • 2.Qd4#
  • Tries
    • 1.Se7+?
      • 1...Ke5
        • 2.Sd7#
      • 1...Qxe7!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qd2#
      • 1...Qxb8
        • 2.Se7#
      • 1...e3
        • 2.Qg2#
      • 1...Qh6
        • 2.Se7#
      • 1...Qg7
        • 2.Se7#
      • 1...Qh8
        • 2.Se7#
      • 1...Sc6
        • 2.Rxb5#
      • 1...Se5
        • 2.Sf4#
      • 1...c3
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(h);N_GUARD::R(B),XP(e)
    • S(i);SBLOCK::S(F)
    • P(c);::QAB1(C),XP(d)
    • P(d);OGATE::QAR1(C)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(f);P-FLIGHT,S_CUTQ(j)::S(G)
      • Refutation
        • Q(j);XS(F)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • Q(j);N_GUARD,XS(G)::S(F)
      • P(d);OGATEB::QAB(C)
      • Q(j);N_GUARD,P_PINQ(C)::S(F)
      • Q(j);N_GUARD::S(F)
      • S(h);N_GUARD::R(B),XP(e)
      • S(i);SBLOCK::S(F)
      • P(c);OGATEB::QAB(C)
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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).