MESON Chess Problem Database

Problem Display
PID: 36 (1q2B3/5NPK/2nr3p/2R2N1k/4P3/rb5P/1B2R3/3Q4 w - - 0 1)

Chicco, Adriano

De Problemist, 1930

1q2B3/5NPK/2nr3p/2R2N1k/4P3/rb5P/1B2R3/3Q4

#2

11 + 7

1577 Jaarboek 1934
1401 Postsjakk 1965
2048 Tuxens skakopgaver (Leif C Schmidt) 1984
14609 Mostly Three=Movers 1995
136 Problem Observer 2016
136 Problem Observer 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Rec2#
    • 1...Rf6
      • 2.Rec2#
    • 1...Bd5
      • 2.Re3#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qg4#
      • 1...Rg6
        • 2.Qxg6#
      • 1...Se5!
    • 1.g8Q?
      • threat
        • 2.Qg4#
      • 1...Rg6
        • 2.Qxg6#
      • 1...Se5!
  • Keys
    • 1.Bf6!
      • threat
        • 2.Sg3#
      • 1...Rxf6
        • 2.Rec2#
      • 1...Rd5
        • 2.Sd8#
      • 1...Bd5
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(e);N_GUARD::QAB(A)+R(C)
    • B(b);N_GUARD,S_CUTR(e)::QAB(A)+R(C)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(e);N_GUARD::QAB1(A),XR(e)
      • Refutation
        • S(d);
    • Try
      • P(I);
      • Threat
        • QAB1(I)
      • Vars
        • R(e);N_GUARD::QAB1(I),XR(e)
      • Refutation
        • S(d);
  • Actual
    • B(B);
    • Threat
      • R(F)+S(G),DCHECK
    • Vars
      • R(e);N_GUARD,XB(B)::QAB(A)+R(C)
      • R(e);S_CUTB(b)::B(K)+S(H)
      • B(b);N_GUARD,S_CUTR(e)::QAB(A)+R(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).