MESON Chess Problem Database

Problem Display
PID: 180508 (7B/Q1N1p1n1/5n2/1N1PkPp1/4B1P1/2b2K2/1pP5/1b6 w - - 0 1)

Lider, Valentin Viktorovich

3rd Prize, Tidskrift for Schack, 1976

7B/Q1N1p1n1/5n2/1N1PkPp1/4B1P1/2b2K2/1pP5/1b6

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Qd4#
    • 1...Bd2
      • 2.Qd4#
    • 1...Bb4
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Ba5
      • 2.Qd4#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qxc3#
      • 1...Sxe4
        • 2.Bxg7#
      • 1...Sxf5
        • 2.Bxf5#
      • 1...Be1
        • 2.Qd4#
      • 1...Bd2
        • 2.Qd4#
      • 1...Bb4
        • 2.Qd4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Ba5
        • 2.Qd4#
      • 1...Se6
        • 2.Bd3#
      • 1...Sxd5!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qxc3#
      • 1...Sxe4
        • 2.Qxe7#
      • 1...Sxd5
        • 2.Bxg7#
      • 1...Sxf5
        • 2.d6#
      • 1...Be1
        • 2.Qd4#
      • 1...Bd2
        • 2.Qd4#
      • 1...Bb4
        • 2.Qd4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Ba5
        • 2.Qd4#
      • 1...Se6
        • 2.dxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD::QAB1(H)
    • B(c);N_GUARD::QAB1(H),XB(c)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAB(H),XB(c)
      • Vars
        • S(f);OGATEB,P_SPINS(f),XB(C)::B(J),XS(h)
        • S(h);OGATE,P_SPINS(f),XP(G)::QAR(H)+B(C),XS(h)
        • B(c);N_GUARD::QAB1(H)
        • B(c);N_GUARD::QAB1(H),XB(c)
        • S(h);P_SPINS(f)::QAR(H)+B(C)
      • Refutation
        • S(f);P_SPINS(h),XP(F)
  • Actual
    • Q(H);
    • Threat
      • QAB(H),XB(c)
    • Vars
      • S(f);P_SPINS(h),XB(C)::QAR2(H),XP(g)
      • S(f);OGATEB,P_SPINS(f),XP(F)::B(J),XS(h)
      • S(h);P_SPINS(f),XP(G)::QAR(H)+P(F)
      • B(c);N_GUARD::QAB1(H)
      • B(c);N_GUARD::QAB1(H),XB(c)
      • S(h);OGATE,P_SPINS(f)::QAR(H)+P(F),XS(h)
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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).