MESON Chess Problem Database

Problem Display
PID: 134123 (2R5/1B4Kn/1n6/2P1k3/3NpNPP/3PqP2/Q7/4R3 w - - 0 1)

Taraba, Jozef

Pravda, 1979

2R5/1B4Kn/1n6/2P1k3/3NpNPP/3PqP2/Q7/4R3

#2

12 + 5

14580 Chess Compositions (Taraba) 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qa1#
      • 2.Qb2#
    • 1...Kxf4
      • 2.Qh2#
    • 1...Qc1
      • 2.Rxe4#
    • 1...Qg1
      • 2.Rxe4#
    • 1...Qd2
      • 2.Rxe4#
    • 1...Qf2
      • 2.Rxe4#
    • 1...Qxd4
      • 2.Sg6#
    • 1...Qxf4
      • 2.Sc6#
  • Tries
    • 1.Re8+?
      • 1...Kxf4
        • 2.Qh2#
      • 1...Kxd4!
    • 1.Qd5+?
      • 1...Kxf4
        • 2.Qd6#
      • 1...Sxd5!
    • 1.Qe6+?
      • 1...Kxf4
        • 2.Qd6#
      • 1...Kxd4!
    • 1.Qf7?
      • threat
        • 2.Sc6#
      • 1...Qxd4
        • 2.Sg6#
        • 2.Re8#
        • 2.Qf5#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Kxd4!
    • 1.Qb2?
      • threat
        • 2.Sg6#
      • 1...Kxf4
        • 2.Qh2#
      • 1...Qxd4
        • 2.Rxe4#
      • 1...Qxf4
        • 2.Re8#
      • 1...Sf8!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Sc6#
      • 1...Kxd4
        • 2.Qb2#
      • 1...Qxd4
        • 2.Re8#
      • 1...Qxf4
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • K(c);OGATEB,S_FLIGHT,XS(F)::QAB(B)
    • Q(a);OGATE,P_SPINP(b)::R1(A),XP(b)
    • Q(a);OGATE,P_PINP(G),P_SPINP(b)::R1(A),XP(b)
    • Q(a);P_SPINP(b),SBLOCK,XS(E)::S(F)
    • Q(a);P_SPINP(b),SBLOCK,XS(F)::S(E)
  • Tries
    • Try
      • R(L);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(F)::QAB(B)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(F)::QAB(B)
      • Refutation
        • S(d);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(F)::QAB(B)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
    • Try
      • Q(B);
      • Threat
        • S(E)
      • Vars
        • S(e);N_GUARD::QAB1(B),XS(e)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
    • Try
      • Q(B);
      • Threat
        • S(F)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XS(F)::QAB(B)
        • Q(a);OGATE,P_SPINP(b),P_SPINQ(a),XS(E)::R1(A),XP(b)
        • Q(a);P_SPINP(b),SBLOCK,XS(F)::R(L)
      • Refutation
        • S(e);
  • Actual
    • Q(B);
    • Threat
      • S(E)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XS(E)::QAB(B)
      • Q(a);P_SPINP(b),SBLOCK,XS(E)::R(L)
      • Q(a);OGATE,P_SPINP(b),P_SPINQ(a),XS(F)::R1(A),XP(b)
HTML5 logo

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).