MESON Chess Problem Database

Problem Display
PID: 63271 (B1n5/p7/2pN1R2/n1pk4/3P2r1/1P3PP1/1R1Q1K2/B7 w - - 0 1)

Janevski, Zivko

1st Place, League of Macedonian Problemists, 1998

B1n5/p7/2pN1R2/n1pk4/3P2r1/1P3PP1/1R1Q1K2/B7

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qg5#
    • 1...Re4
      • 2.fxe4#
    • 1...Sc4
      • 2.bxc4#
    • 1...cxd4
      • 2.Qxa5#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Se3#
      • 1...Rxd4
        • 2.Qg5#
      • 1...Sxc4
        • 2.Bxc6#
      • 1...cxd4
        • 2.Qxa5#
      • 1...Re4!
    • 1.Sxc8?
      • threat
        • 2.Se7#
        • 2.Rd6#
      • 1...Rxd4
        • 2.Qg5#
      • 1...cxd4
        • 2.Qxa5#
      • 1...Re4
        • 2.Rd6#
      • 1...Rg6
        • 2.Se7#
      • 1...Rg7
        • 2.Rd6#
      • 1...Sc4
        • 2.Se7#
        • 2.Bxc6#
      • 1...Sb7
        • 2.Se7#
      • 1...Sxb3!
    • 1.Qe1?
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Rd2#
      • 1...Rxd4
        • 2.Qe6#
      • 1...cxd4
        • 2.Qxa5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Rg5
        • 2.Qe4#
      • 1...Sc4!
    • 1.Qe3?
      • threat
        • 2.Qe5#
      • 1...Rxd4
        • 2.Qg5#
        • 2.Qe6#
      • 1...Re4
        • 2.Qxe4#
        • 2.fxe4#
      • 1...Rg5
        • 2.Qe4#
      • 1...Sc4
        • 2.bxc4#
      • 1...cxd4!
    • 1.Qf4?
      • threat
        • 2.Qe5#
      • 1...cxd4
        • 2.Qf5#
      • 1...Rg5
        • 2.Qe4#
      • 1...Sc4
        • 2.bxc4#
      • 1...Rxf4!
    • 1.Qxa5?
      • threat
        • 2.Qxc5#
      • 1...Kxd4
        • 2.Rd2#
      • 1...Rxd4!
    • 1.Qg5+?
      • 1...Kxd4
        • 2.Rd2#
      • 1...Rxg5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Rd2#
      • 1...Rxd4
        • 2.Qe6#
      • 1...cxd4
        • 2.Qb5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Rg5
        • 2.Qe4#
      • 1...Sc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD,P_SPINR(a),SBLOCK,XP(H)::QAR(C)
    • R(a);OGATE::P(F),XR(a)
    • S(b);OGATE::P(E),XS(b)
    • P(c);N_SPINP(e),OGATEB,P_SPINP(c),SBLOCK,XP(H)::QAR(C),XS(b)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • R(a);N_GUARD,P_SPINR(a),SBLOCK,XP(H)::QAR(C)
        • S(b);N_GUARD,XS(I)::B(K),XP(e)
        • P(c);N_SPINP(e),OGATEB,P_SPINP(c),SBLOCK,XP(H)::QAR(C),XS(b)
      • Refutation
        • R(a);
    • Try
      • S(I);XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_GUARD,P_SPINR(a),SBLOCK,XP(H)::QAR(C)
        • P(c);N_SPINP(e),OGATEB,P_SPINP(c),SBLOCK,XP(H)::QAR(C),XS(b)
        • R(a);::R1(J)
        • R(a);::S(I)
        • S(b);N_SPINP(e)::S(I)
      • Refutation
        • S(b);XP(E)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(d);N_SPINP(e),OGATEB,P-FLIGHT,XP(H)::B(A)+R(B),DCHECK
        • R(a);SBLOCK,XP(H)::QAB1(C)
        • P(c);OGATEB,SBLOCK,XP(H)::QAR(C),XS(b)
        • R(a);N_GUARD::QAB1(C),XR(a)
        • R(a);N_GUARD::QAB1(C)
      • Refutation
        • S(b);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(a);N_GUARD::QAB1(C)
        • S(b);OGATE::P(E),XS(b)
      • Refutation
        • P(c);XP(H)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • P(c);SBLOCK,XP(H)::QAR2(C)
        • R(a);N_GUARD::QAB1(C)
        • S(b);OGATE::P(E),XS(b)
      • Refutation
        • R(a);P_PINP(F),XQ(C)
    • Try
      • Q(C);N_PINP(e),P_PINP(c),XS(b)
      • Threat
        • QAR1(C),XP(c)
      • Vars
        • K(d);N_SPINP(c),OGATEB,P-FLIGHT,XP(H)::B(A)+R(B),DCHECK
      • Refutation
        • R(a);XP(H)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);N_SPINP(e),P-FLIGHT,XP(H)::B(A)+R(B),DCHECK
      • Refutation
        • R(a);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(d);N_SPINP(e),OGATEB,P-FLIGHT,XP(H)::B(A)+R(B),DCHECK
      • R(a);SBLOCK,XP(H)::QAB1(C)
      • P(c);OGATEB,SBLOCK,XP(H)::QAR2(C)
      • R(a);N_GUARD::QAB1(C),XR(a)
      • R(a);N_GUARD::QAB1(C)
      • S(b);N_GUARD::QAB1(C),XS(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).