MESON Chess Problem Database

Problem Display
PID: 103762 (8/p1Q2bK1/8/5p2/p2k1p2/N1nPnPN1/3R2P1/8 w - - 0 1)

Selivanov, VK

Na Smenu!, 1964

8/p1Q2bK1/8/5p2/p2k1p2/N1nPnPN1/3R2P1/8

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc4
      • 2.dxc4#
    • 1...Se4
      • 2.dxe4#
    • 1...Scd5
      • 2.Sb5#
      • 2.Se2#
    • 1...Sed5
      • 2.Sc2#
      • 2.Sxf5#
  • Tries
    • 1.Sb5+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Sxb5!
    • 1.Sxf5+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Sxf5+!
    • 1.Qd6+?
      • 1...Scd5
        • 2.Sb5#
        • 2.Se2#
      • 1...Sed5
        • 2.Sc2#
        • 2.Sxf5#
      • 1...Bd5!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qc5#
      • 1...Kd5
        • 2.Qd6#
      • 1...Sxe4
        • 2.dxe4#
      • 1...fxe4
        • 2.dxe4#
      • 1...Bd5
        • 2.Qxc3#
      • 1...Scd5
        • 2.Sb5#
      • 1...Sed5
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(h);OGATE::R(A)+P(D),XB(h)
    • S(a);OGATE::R(A)+P(D),XS(a)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(G)
      • Refutation
        • S(a);XS(C)
    • Try
      • S(F);CHECK,XP(f)
      • Vars
        • K(d);P-FLIGHT::QAR1(G)
      • Refutation
        • S(b);CHECK,XS(F)
    • Try
      • Q(G);CHECK
      • Refutation
        • B(h);P_SPINB(h)
  • Actual
    • S(F);
    • Threat
      • QAB1(G)
    • Vars
      • K(d);P-FLIGHT::QAR1(G)
      • S(a);OGATE,XS(F)::R(A)+P(D),XS(a)
      • P(f);OGATE,XS(F)::R(A)+P(D),XP(f)
      • B(h);SBLOCK::QAB1(G),XS(a)
      • S(a);N_GUARD,SBLOCK::S(C)
      • S(b);N_GUARD,SBLOCK::S(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).