MESON Chess Problem Database

Problem Display
PID: 81169 (2K4B/pp1Rp3/2p1k2N/r5P1/p5P1/nR1nN3/B2r4/8 w - - 0 1)

Mirri, Giorgio

Piatesi, Antonio

1st Prize, Grunenwald/Monreal JT (diagrammes), 1978

2K4B/pp1Rp3/2p1k2N/r5P1/p5P1/nR1nN3/B2r4/8

#2

9 + 10

56 The Problemist 1981

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.gxf5#
    • 1...Sc2
      • 2.Rb5#
    • 1...Sb5
      • 2.Rb2#
    • 1...c5
      • 2.Rb6#
  • Tries
    • 1.Rb5+?
      • 1...Sc4
        • 2.Bxc4#
      • 1...Rxa2!
  • Keys
    • 1.Sef5!
      • threat
        • 2.Sd4#
      • 1...Rxf5
        • 2.gxf5#
      • 1...Rd5
        • 2.Rxe7#
      • 1...Sc2
        • 2.Rb5#
      • 1...Sb5
        • 2.Rb2#
      • 1...Sc1
        • 2.Re3#
      • 1...Se1
        • 2.Re3#
      • 1...Sb2
        • 2.Re3#
      • 1...Sf2
        • 2.Re3#
      • 1...Sb4
        • 2.Re3#
      • 1...Sf4
        • 2.Re3#
      • 1...Sc5
        • 2.Re3#
      • 1...Se5
        • 2.Sg7#
      • 1...c5
        • 2.Rb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(e);OGATE::P(D),XR(e)
    • S(b);N_GUARD,S_CUTR(a)::B(A)+R(B)
    • S(b);N_GUARD,S_CUTR(e)::B(A)+R(B)
    • P(f);::B(A)+R(B),DCHECK
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::B(A),XS(b)
      • Refutation
        • R(a);XB(A)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • R(e);OGATE,XS(C)::P(D),XR(e)
      • R(e);SBLOCK::R1(G),XP(j)
      • S(b);N_GUARD,S_CUTR(a)::B(A)+R(B)
      • S(b);N_GUARD,S_CUTR(e)::B(A)+R(B)
      • S(c);OGATE::B(A)+R(B),DCHECK
      • S(c);SBLOCK::S(C)
      • P(f);::B(A)+R(B),DCHECK
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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).