MESON Chess Problem Database

Problem Display
PID: 261039 (8/K7/p4QNP/r4N1q/B4BkP/r4R1p/8/5R1b w - - 0 1)

Pirrone, Santi

L'Italia Scacchistica, 1974

8/K7/p4QNP/r4N1q/B4BkP/r4R1p/8/5R1b

#2

10 + 7

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg6
      • 2.Qxg6#
    • 1...Qg5
      • 2.Qxg5#
    • 1...Ra1
      • 2.Se3#
      • 2.Rg3#
    • 1...Ra2
      • 2.Se3#
      • 2.Rg3#
    • 1...Re3
      • 2.Sxe3#
    • 1...R3xa4
      • 2.Se3#
      • 2.Rg3#
    • 1...R5xa4
      • 2.Se5#
    • 1...Re5
      • 2.Sxe5#
  • Tries
    • 1.Bd7?
      • threat
        • 2.Se3#
      • 1...Qxg6
        • 2.Qxg6#
      • 1...Qxh4
        • 2.Qxh4#
      • 1...Qxf5
        • 2.Qg5#
      • 1...Rxf5
        • 2.Se5#
      • 1...Qg5
        • 2.Qxg5#
      • 1...Re3
        • 2.Sxe3#
      • 1...Qxh6!
  • Keys
    • 1.Bd1!
      • threat
        • 2.Rg3#
      • 1...Rxf3
        • 2.Se3#
      • 1...Bxf3
        • 2.Rg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(f);OGATE,XS(H)::QAR2(G),XQ(f)
    • Q(f);N_GUARD::QAR1(G),XQ(f)
    • R(b);N_GUARD::S(F),XR(b)
    • R(e);N_GUARD,XB(C)::S(H)
    • R(e);N_GUARD::S(H),XR(e)
  • Tries
    • Try
      • B(C);
      • Threat
        • B(C)+S(F),DCHECK
      • Vars
        • Q(f);OGATE,XS(H)::QAR2(G),XQ(f)
        • Q(f);OGATE,XP(E)::QAR1(G),XQ(f)
        • Q(f);N_GUARD,P_SPINQ(f),XS(F)::QAR1(G)
        • R(e);N_GUARD,P_SPINR(e),XS(F)::S(H)
        • Q(f);N_GUARD::QAR1(G),XQ(f)
        • R(b);::B(C)+S(F),DCHECK,XR(b)
      • Refutation
        • Q(f);XP(I)
  • Actual
    • B(C);
    • Threat
      • B(C)+R(B),DCHECK
    • Vars
      • R(b);N_GUARD,P_SPINR(b),XR(B)::S(F)
      • B(a);N_GUARD,P_SPINB(a),XR(B)::R(A)
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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).