MESON Chess Problem Database

Problem Display
PID: 271672 (8/4rN2/n1Q2ppN/3B2P1/R3Pkp1/BR4n1/3P4/K7 w - - 0 1)

Udartsev, Valentin Filipovich

HM., Buletin Problemistic, 1976

8/4rN2/n1Q2ppN/3B2P1/R3Pkp1/BR4n1/3P4/K7

#2

11 + 7

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Bd6#
      • 2.Qd6#
    • 1...Ra7
      • 2.Bd6#
      • 2.Qd6#
    • 1...Rb7
      • 2.Bd6#
      • 2.Qd6#
    • 1...Rc7
      • 2.Bd6#
      • 2.Qd6#
    • 1...Sf1
      • 2.Qxf6#
    • 1...Sh1
      • 2.Qxf6#
    • 1...Se2
      • 2.Qxf6#
    • 1...Sxe4
      • 2.Qxf6#
  • Tries
    • 1.Bc1?
      • threat
        • 2.d4#
      • 1...Rxe4
        • 2.Qd6#
      • 1...Sxe4
        • 2.Qxf6#
      • 1...Sf1
        • 2.Qxf6#
      • 1...Se2
        • 2.Qxf6#
      • 1...Sf5!
    • 1.e5+?
      • 1...Se4
        • 2.Rxe4#
        • 2.Qxf6#
      • 1...Sb4!
  • Keys
    • 1.Qc1!
      • threat
        • 2.d4#
      • 1...Rxe4
        • 2.Bd6#
      • 1...Sxe4
        • 2.Qf1#
      • 1...Sf5
        • 2.Qf1#
      • 1...Rc7
        • 2.Bd6#
      • 1...Sf1
        • 2.Qxf1#
      • 1...Se2
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAR2(I),XP(e)
    • S(a);N_GUARD,P_SPINS(a),XP(F)::QAR2(I),XP(e)
  • Tries
    • Try
      • B(C);
      • Threat
        • B(C)+P(B)
      • Vars
        • R(g);N_GUARD,P_SPINR(g),XP(F)::QAB(I)
        • S(a);N_GUARD,P_SPINS(a),XP(F)::QAR2(I),XP(e)
        • S(a);N_GUARD::QAR2(I),XP(e)
      • Refutation
        • S(a);
    • Try
      • P(F);CHECK
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+P(B)
    • Vars
      • R(g);N_GUARD,P_SPINR(g),XP(F)::B(C)
      • S(a);N_GUARD,P_SPINS(a),XP(F)::QAR(I)
      • S(a);N_GUARD::QAR(I)
      • R(g);N_GUARD::B(C)
      • S(a);N_GUARD::QAR(I),XS(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).