MESON Chess Problem Database

Problem Display
PID: 32863 (2nR1b2/2P2P2/2QPkPB1/1p2NnP1/3p1P2/qb4pK/8/8 w - - 0 1)

Foschini, Ettore

De Problemist, 1929

2nR1b2/2P2P2/2QPkPB1/1p2NnP1/3p1P2/qb4pK/8/8

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qd7#
    • 1...Bxd6
      • 2.f8S#
    • 1...Sxd6
      • 2.c8Q#
      • 2.c8B#
  • Tries
    • 1.Re8+?
      • 1...Be7
        • 2.f8S#
      • 1...Sce7
        • 2.c8Q#
        • 2.c8B#
      • 1...Sfe7!
    • 1.d7+?
      • 1...Qd6
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...Bd6
        • 2.dxc8Q#
        • 2.dxc8B#
        • 2.f8S#
      • 1...Sfd6
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...Scd6!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qe4#
      • 1...Qxd6
        • 2.Sc5#
      • 1...Bxd6
        • 2.f8S#
      • 1...Sfxd6
        • 2.f5#
      • 1...Scxd6
        • 2.c8Q#
        • 2.c8B#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Qa8
        • 2.Sc5#
      • 1...Bd5
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::QAB1(E)
    • B(i);OGATE,P_SPINB(i),XP(F)::P=S
    • S(h);OGATE,P_SPINS(h),XP(F)::P=Q
  • Tries
    • Try
      • R(K);CHECK
      • Vars
        • B(i);OGATE,P_SPINB(i)::P=S
        • S(h);OGATE,P_SPINS(h)::P=Q
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • P(F);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::PXS(h)=Q
        • S(f);P_SPINS(f)::PXS(h)=Q
      • Refutation
        • S(h);P_SPINS(h)
  • Actual
    • S(C);
    • Threat
      • QAR2(E)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XP(F)::S(C)
      • B(i);OGATE,P_SPINB(i),XP(F)::P=S
      • S(f);OGATE,P_SPINS(f),XP(F)::P(B)
      • S(h);OGATE,P_SPINS(h),XP(F)::P=Q
      • Q(a);N_GUARD::S(C),XQ(a)
      • Q(a);N_GUARD::S(C)
      • B(b);SBLOCK::QAB1(E)
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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).