MESON Chess Problem Database

Problem Display
PID: 180332 (3N2B1/1q3r2/3p4/Qb1kb2R/3nr3/3PBP2/2R5/2N2K2 w - - 0 1)

Lider, Valentin Viktorovich

1st Comm., diagrammes 03. TT, 1975

3N2B1/1q3r2/3p4/Qb1kb2R/3nr3/3PBP2/2R5/2N2K2

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.dxe4#
    • 1...Sf5
      • 2.fxe4#
  • Tries
    • 1.Bxf7+?
      • 1...Se6
        • 2.Bxe6#
        • 2.fxe4#
      • 1...Qxf7!
    • 1.Qa2+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Sb3!
    • 1.Qxb5+?
      • 1...Sxb5
        • 2.dxe4#
      • 1...Qxb5!
  • Keys
    • 1.Sa2!
      • threat
        • 2.Sb4#
      • 1...Sxc2
        • 2.Sc3#
      • 1...Sxf3
        • 2.Sc3#
      • 1...Se2
        • 2.dxe4#
      • 1...Sb3
        • 2.Sc3#
      • 1...Sf5
        • 2.fxe4#
      • 1...Sc6
        • 2.Sc3#
      • 1...Se6
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);N_PINP(D),P_PINP(F)::P(D),XR(b)
    • S(a);OGATE::P(F),XR(b)
  • Tries
    • Try
      • B(J);CHECK,XR(h)
      • Refutation
        • Q(g);XB(J)
    • Try
      • Q(G);CHECK,N_PINB(c),P_PINB(e)
      • Vars
        • B(c);N_GUARD,N_SPINB(e),P_SPINB(c)::QAB1(G),XB(c)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(G);CHECK,N_SPINP(D),P_PINB(e),P_SPINP(F),XB(c)
      • Vars
        • S(a);XQ(G)::P(D),XR(b)
      • Refutation
        • Q(g);N_PINP(F),P_PINP(D),XQ(G)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • S(a);XR(C)::S(A)
      • S(a);XP(F)::S(A)
      • S(a);N_PINP(D),P_PINP(F)::P(D),XR(b)
      • S(a);::S(A)
      • S(a);OGATE::P(F),XR(b)
      • S(a);N_SPINR(h)::S(A)
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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).