MESON Chess Problem Database

Problem Display
PID: 259385 (2R2K2/2np1B2/Ppk1p3/p4p2/1nP5/B2NQ3/8/8 w - - 0 1)

Velikhanov, Kenan

Buletin Problemistic, 1990

2R2K2/2np1B2/Ppk1p3/p4p2/1nP5/B2NQ3/8/8

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qxb6#
    • 1...Sa2
      • 2.Se5#
    • 1...Sc2
      • 2.Se5#
    • 1...Sd5
      • 2.Se5#
    • 1...b5
      • 2.Qc5#
    • 1...d5
      • 2.Qxe6#
    • 1...d6
      • 2.Be8#
  • Tries
    • 1.Bxb4?
      • threat
        • 2.Se5#
      • 1...d6
        • 2.Be8#
      • 1...e5
        • 2.Sxe5#
        • 2.Bd5#
      • 1...axb4!
    • 1.Rxc7+?
      • 1...Kd6
        • 2.Qxb6#
        • 2.Qe5#
      • 1...Kxc7!
    • 1.Qe5?
      • threat
        • 2.Rxc7#
        • 2.Qxc7#
      • 1...b5
        • 2.Qxc7#
        • 2.Qc5#
      • 1...d6
        • 2.Be8#
        • 2.Qb5#
      • 1...Sd5
        • 2.Qd6#
      • 1...Sxa6!
    • 1.Qxe6+?
      • 1...d6
        • 2.Be8#
        • 2.Qe8#
      • 1...dxe6!
  • Keys
    • 1.Be8!
      • threat
        • 2.Qxe6#
      • 1...Kd6
        • 2.Qxb6#
      • 1...Sxa6
        • 2.Qf3#
      • 1...e5
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • K(e);N_GUARD,N_SPINS(g),P-FLIGHT,P_SPINS(a)::QAR2(C),XP(d)
    • S(a);::S(B)
    • P(d);N_GUARD::QAR1(C)
    • P(h);N_GUARD::QAR2(C),XP(f)
    • P(h);OGATEB,SBLOCK::B(F)
  • Tries
    • Try
      • B(A);XS(a)
      • Threat
        • S(B)
      • Vars
        • P(h);OGATEB::B(F)
      • Refutation
        • P(b);XB(A)
    • Try
      • R(G);CHECK,XS(g)
      • Refutation
        • K(e);P-FLIGHT,XR(G)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(C)
      • Refutation
        • S(a);XP(E)
    • Try
      • Q(C);CHECK,XP(f)
      • Refutation
        • P(h);XQ(C)
  • Actual
    • B(F);P_PINP(h)
    • Threat
      • QAR2(C),XP(f)
    • Vars
      • K(e);N_GUARD,N_SPINP(h),N_SPINS(g),P-FLIGHT,P_SPINS(a)::QAR2(C),XP(d)
      • S(a);N_GUARD,XP(E)::QAB(C)
      • P(f);OGATEB::QAR(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).