MESON Chess Problem Database

Problem Display
PID: 263221 (3r4/1P1kPPn1/3P4/1R1B4/4N3/p5r1/Kb5B/8 w - - 0 1)

Somma, Francesco

L'Italia Scacchistica, 1932

3r4/1P1kPPn1/3P4/1R1B4/4N3/p5r1/Kb5B/8

#2

9 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Sc5#
    • 1...Rg2
      • 2.Sc5#
    • 1...Rb3
      • 2.Sc5#
    • 1...Rc3
      • 2.Sf6#
    • 1...Rd3
      • 2.Sc5#
    • 1...Re3
      • 2.Sc5#
    • 1...Rf3
      • 2.Sc5#
    • 1...Rh3
      • 2.Sc5#
    • 1...Rg4
      • 2.Sc5#
    • 1...Rg5
      • 2.Sc5#
    • 1...Rg6
      • 2.Sc5#
    • 1...Se8
      • 2.f8S#
  • Tries
    • 1.Bc6+?
      • 1...Ke6
        • 2.exd8S#
      • 1...Kxc6!
    • 1.e8Q+?
      • 1...Sxe8
        • 2.f8S#
      • 1...Rxe8!
    • 1.e8B+?
      • 1...Sxe8
        • 2.f8S#
      • 1...Rxe8!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Rc7#
      • 1...Rc3
        • 2.Sf6#
      • 1...Rc8
        • 2.bxc8Q#
        • 2.bxc8B#
      • 1...Se6
        • 2.Bc6#
      • 1...Se8
        • 2.f8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • R(c);::S(C)
    • R(c);S_CUTB(a)::S(C)
    • S(e);SBLOCK,S_CUTR(f)::P=S
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(d);N_GUARD,S_FLIGHT::PXR(f)=S
      • Refutation
        • K(d);S_FLIGHT,XB(E)
    • Try
      • P(H);CHECK
      • Vars
        • S(e);N_GUARD,SBLOCK,S_CUTR(f),XQ(H)::P=S
      • Refutation
        • R(f);XQ(H)
    • Try
      • P(H);CHECK
      • Vars
        • S(e);N_GUARD,SBLOCK,S_CUTR(f),XB(H)::P=S
      • Refutation
        • R(f);XB(H)
  • Actual
    • R(D);
    • Threat
      • R1(D)
    • Vars
      • R(c);S_CUTB(a)::S(C)
      • R(f);OGATE::PXR(f)=Q
      • S(e);SBLOCK::B(E)
      • S(e);SBLOCK,S_CUTR(f)::P=S
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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).