MESON Chess Problem Database

Problem Display
PID: 261878 (B7/QN1p2K1/2r2Rn1/2rn3R/2p1k3/b3PN2/3PPp1q/8 w - - 0 1)

Somma, Francesco

L'Italia Scacchistica, 1934

B7/QN1p2K1/2r2Rn1/2rn3R/2p1k3/b3PN2/3PPp1q/8

#2

10 + 10

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Qd4#
    • 1...Rb5
      • 2.Qd4#
    • 1...Sb4
      • 2.Sxc5#
    • 1...Sdf4
      • 2.Sd6#
    • 1...Sgf4
      • 2.Re5#
    • 1...Se5
      • 2.Sg5#
  • Tries
    • 1.Re5+?
      • 1...Sxe5
        • 2.Sg5#
      • 1...Qxe5!
    • 1.Rf4+?
      • 1...Sdxf4
        • 2.Sd6#
      • 1...Sgxf4
        • 2.Re5#
      • 1...Qxf4!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qc2#
      • 1...Sxe3
        • 2.d3#
      • 1...Sb4
        • 2.Sxc5#
      • 1...Sdf4
        • 2.Sd6#
      • 1...Sgf4
        • 2.Re5#
      • 1...Se5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(f);OGATE::QAR1(G)
    • S(g);S_CUTB(c),S_CUTR(h)::S(H),XR(f)
    • S(g);S_CUTQ(b),S_CUTR(h)::S(H)
    • S(i);N_GUARD,S_CUTQ(b)::R1(E)
    • S(i);SBLOCK::S(D)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • S(i);SBLOCK,XR(E)::S(D)
      • Refutation
        • Q(b);P_PINR(F),XR(E)
    • Try
      • R(F);CHECK
      • Vars
        • S(g);XR(F)::S(H)
        • S(i);XR(F)::R1(E)
      • Refutation
        • Q(b);XR(F)
  • Actual
    • Q(G);P_PINP(d)
    • Threat
      • QAB(G)
    • Vars
      • S(g);SBLOCK,XP(C)::P(A)
      • S(g);N_SPINP(d),S_CUTB(c),S_CUTR(h)::S(H),XR(f)
      • S(g);S_CUTQ(b),S_CUTR(h)::S(H)
      • S(i);N_GUARD,S_CUTQ(b)::R1(E)
      • S(i);SBLOCK::S(D)
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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).