MESON Chess Problem Database

Problem Display
PID: 100941 (1Bnn4/1NpPPr2/1qkPB2Q/PpN1R3/1p5b/1KR5/8/7b w - - 0 1)

Fink, Adolf Jay

Good Companions, 1920

1Bnn4/1NpPPr2/1qkPB2Q/PpN1R3/1p5b/1KR5/8/7b

#2

12 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Bd5#
    • 1...Rf6
      • 2.exd8S#
    • 1...Bd5+
      • 2.Bxd5#
    • 1...Be1
      • 2.exd8S#
    • 1...Bf2
      • 2.exd8S#
    • 1...Bg3
      • 2.exd8S#
    • 1...Bf6
      • 2.Qxh1#
    • 1...Sxd6
      • 2.Sxd8#
  • Tries
    • 1.Se4+?
      • 1...Qc5
        • 2.Sxd8#
      • 1...bxc3
        • 2.Sxd8#
      • 1...Kxb7!
    • 1.dxc8S?
      • threat
        • 2.Sxd8#
        • 2.Bd7#
      • 1...Bd5+
        • 2.Bxd5#
      • 1...Qxc5
        • 2.Sxd8#
      • 1...Qxb7
        • 2.Bd7#
      • 1...Rxe7
        • 2.Sxd8#
      • 1...Bxe7
        • 2.Bd7#
      • 1...Sxb7
        • 2.Bd7#
      • 1...cxd6
        • 2.Bd7#
      • 1...Rf8
        • 2.Bd7#
      • 1...Sxe6!
  • Keys
    • 1.dxc7!
      • threat
        • 2.Bd5#
      • 1...Bd5+
        • 2.Bxd5#
      • 1...Qxc5
        • 2.cxd8S#
      • 1...Sxe6
        • 2.d8S#
      • 1...Rf6
        • 2.exd8S#
      • 1...Bf6
        • 2.Qxh1#
      • 1...Sd6
        • 2.Sxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(h);P_PINR(B),S_CUTB(a)::B(G)
    • R(h);S_CUTB(c)::PXS(j)=S
    • B(a);CHECK,N_GUARD::B(G),XB(a)
    • B(c);N_GUARD::PXS(j)=S
    • B(c);OGATE::QAB(H),XB(a)
    • S(i);SBLOCK,XP(F)::S(I),XS(j)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • Q(e);P_SPINQ(e)::S(I),XS(j)
        • P(b);XR(B)::S(I),XS(j)
      • Refutation
        • K(f);S_FLIGHT,XS(I)
    • Try
      • P(J);XS(i)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);CHECK,N_GUARD::B(G),XB(a)
        • Q(e);P_SPINQ(e),XS(D)::S(I),XS(j)
        • Q(e);XS(I)::B(G)
        • R(h);XP(K)::S(I),XS(j)
        • B(c);XP(K)::B(G)
        • S(j);XS(I)::B(G)
        • P(g);XP(F)::B(G)
        • R(h);::B(G)
      • Refutation
        • S(j);XB(G)
  • Actual
    • P(F);XP(g)
    • Threat
      • QAR(H)+B(G),DCHECK
    • Vars
      • B(a);CHECK::QAR(H)+B(G),DCHECK,XB(a)
      • Q(e);N_GUARD,P_SPINQ(e),XS(D)::PXS(j)=S
      • S(j);OGATE,P_SPINS(j),XB(G)::P=S
      • R(h);S_CUTB(c)::PXS(j)=S
      • B(c);OGATE::QAB(H),XB(a)
      • S(i);SBLOCK::S(I),XS(j)
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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).