MESON Chess Problem Database

Problem Display
PID: 101368 (8/8/1pQ1p3/1Bpnp1K1/1Bn3N1/2Pk1p2/R2P1P2/3R4 w - - 0 1)

Janet, Frank

Good Companions, 1920

8/8/1pQ1p3/1Bpnp1K1/1Bn3N1/2Pk1p2/R2P1P2/3R4

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.d3#
    • 1...Sxc3
      • 2.dxc3#
    • 1...Se3
      • 2.dxe3#
    • 1...Sxb4
      • 2.Qxf3#
    • 1...Sf4
      • 2.Qxf3#
    • 1...Sf6
      • 2.Qxf3#
    • 1...Sc7
      • 2.Qxf3#
    • 1...Se7
      • 2.Qxf3#
    • 1...cxb4
      • 2.Qxc4#
  • Tries
    • 1.Bxc4+?
      • 1...Ke4
        • 2.Sf6#
        • 2.Re1#
        • 2.d3#
      • 1...Kxc4!
    • 1.Re1?
      • threat
        • 2.Sxe5#
      • 1...e4
        • 2.Se5#
      • 1...Sxc3!
  • Keys
    • 1.Se3!
      • 1...Ke2
        • 2.d4#
      • 1...Ke4
        • 2.d3#
      • 1...Sxc3
        • 2.dxc3#
      • 1...Sxe3
        • 2.dxe3#
      • 1...Sxb4
        • 2.Bxc4#
      • 1...cxb4
        • 2.Qxc4#
      • 1...Sf4
        • 2.Bxc4#
      • 1...Sf6
        • 2.Bxc4#
      • 1...Sc7
        • 2.Bxc4#
      • 1...Se7
        • 2.Bxc4#
      • 1...e4
        • 2.Bxc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 5
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINS(c),OGATE,P_SPINS(e),S_FLIGHT::P(C)
    • S(e);OGATE,XP(E)::R(A)+P(C),XS(e)
    • S(e);OGATE::R(A)+P(C),XS(e)
    • S(e);OGATE,XB(F)::QAR2(J),XP(b)
    • S(e);OGATE::QAR2(J),XP(b)
    • P(d);OGATE,XB(F)::QAB1(J),XS(c)
  • Tries
    • Try
      • B(H);CHECK,XS(c)
      • Refutation
        • K(a);P_SPINP(d),S_FLIGHT,XB(H)
    • Try
      • R(A);
      • Threat
        • S(G),XP(f)
      • Vars
        • P(f);::S(G)
      • Refutation
        • S(e);XP(E)
  • Actual
    • S(G);
    • Vars
      • K(a);OGATE,S_FLIGHT::R(B)+P(C)
      • K(a);N_SPINS(c),OGATE,P_SPINS(e),S_FLIGHT::P(C)
      • S(e);OGATE,XP(E)::R(A)+P(C),XS(e)
      • S(e);OGATE,XS(G)::R(A)+P(C),XS(e)
      • S(e);XB(F)::B(H),XS(c)
      • P(d);OGATE,XB(F)::QAB1(J),XS(c)
      • S(e);::B(H),XS(c)
      • P(f);SBLOCK::B(H),XS(c)
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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).