MESON Chess Problem Database

Problem Display
PID: 125521 (3B4/2pR4/3pBR2/q2pkPr1/4N2b/N1n1P1n1/2PP1PP1/4K3 w - - 0 1)

Eriksson, Finn Olof

Norsk Sjakkblad, 1937

3B4/2pR4/3pBR2/q2pkPr1/4N2b/N1n1P1n1/2PP1PP1/4K3

#2

13 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Scxe4
      • 2.f4#
    • 1...Sgxe4
      • 2.d4#
    • 1...dxe4
      • 2.Sc4#
  • Tries
    • 1.Sc4+?
      • 1...Kxe4
        • 2.d3#
        • 2.f3#
      • 1...dxc4!
    • 1.Bg8?
      • threat
        • 2.Re7#
      • 1...Kxe4
        • 2.Re7#
      • 1...Scxe4
        • 2.f4#
      • 1...Sgxe4
        • 2.d4#
      • 1...Sxf5
        • 2.Re6#
      • 1...dxe4
        • 2.Sc4#
      • 1...Rg7!
  • Keys
    • 1.Bf7!
      • threat
        • 2.Re7#
      • 1...Kxe4
        • 2.Re7#
      • 1...Scxe4
        • 2.f4#
      • 1...Sgxe4
        • 2.d4#
      • 1...Sxf5
        • 2.Re6#
      • 1...dxe4
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);P_PINP(C),SBLOCK,XS(H)::P(D)
    • S(b);P_PINP(D),SBLOCK,XS(H)::P(C)
    • P(e);N_GUARD,SBLOCK,XS(H)::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • P(e);XS(F)
    • Try
      • B(J);
      • Threat
        • R(L)
      • Vars
        • K(f);P-FLIGHT,XS(H)::R(L)
        • S(a);P_PINP(C),SBLOCK,XS(H)::P(D)
        • S(b);P_PINP(D),SBLOCK,XS(H)::P(C)
        • S(b);P_PINP(D),SBLOCK,XP(I)::R1(K)
        • P(e);N_GUARD,SBLOCK,XS(H)::S(F)
      • Refutation
        • R(g);
  • Actual
    • B(J);
    • Threat
      • R(L)
    • Vars
      • K(f);P-FLIGHT,XS(H)::R(L)
      • S(a);P_PINP(C),SBLOCK,XS(H)::P(D)
      • S(b);P_PINP(D),SBLOCK,XS(H)::P(C)
      • S(b);P_PINP(D),SBLOCK,XP(I)::R1(K)
      • P(e);N_GUARD,SBLOCK,XS(H)::S(F)
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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).