MESON Chess Problem Database

Problem Display
PID: 164340 (2Q1r1bB/6R1/B4R2/2r5/1pq5/nNk5/2p1p3/K1N5 w - - 0 1)

Hermanson, Halvar

Novi Temi, 1978

2Q1r1bB/6R1/B4R2/2r5/1pq5/nNk5/2p1p3/K1N5

#2

8 + 9

SOLUTION

  • SOUND
  • Tries
    • 1.Rf3+?
      • 1...Qd3
        • 2.Rxd3#
        • 2.Re7#
      • 1...Re3!
    • 1.Rg3+?
      • 1...Qd3
        • 2.Rxd3#
        • 2.Re6#
      • 1...Re3!
    • 1.Re7?
      • threat
        • 2.Rf3#
      • 1...Qxb3
        • 2.Rd6#
      • 1...Qb5
        • 2.Rf4#
      • 1...Qf4
        • 2.Rxf4#
      • 1...Rf5
        • 2.Rxf5#
      • 1...Qxa6!
    • 1.Qh3+?
      • 1...Qd3
        • 2.Qxd3#
      • 1...Re3!
  • Keys
    • 1.Re6!
      • threat
        • 2.Rg3#
      • 1...Qxb3
        • 2.Rd7#
      • 1...Qxa6
        • 2.Rg4#
      • 1...Qb5
        • 2.Rg4#
      • 1...Qg4
        • 2.Rxg4#
      • 1...Rg5
        • 2.Rxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • R(h);P_SPINR(h)
    • Try
      • R(F);CHECK
      • Refutation
        • R(h);P_SPINR(h)
    • Try
      • R(F);
      • Threat
        • B(H)+R(E),DCHECK
      • Vars
        • Q(f);N_GUARD,P_SPINR(g),XS(C)::B(H)+R(E)
        • Q(f);N_GUARD,P_SPINR(g)::B(H)+R(E)
        • Q(f);N_GUARD,P_SPINR(g)::B(H)+R(E),XQ(f)
        • R(g);N_GUARD,P_SPINQ(f)::B(H)+R(E),XR(g)
      • Refutation
        • Q(f);P_SPINR(g),XB(D)
    • Try
      • Q(G);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::QAR1(G),XQ(f)
      • Refutation
        • R(h);P_SPINR(h)
  • Actual
    • R(E);
    • Threat
      • B(H)+R(F),DCHECK
    • Vars
      • Q(f);N_GUARD,P_SPINR(g),XS(C)::B(H)+R(F)
      • Q(f);N_GUARD,P_SPINR(g),XB(D)::B(H)+R(F)
      • Q(f);N_GUARD,P_SPINR(g)::B(H)+R(F)
      • Q(f);N_GUARD,P_SPINR(g)::B(H)+R(F),XQ(f)
      • R(g);N_GUARD,P_SPINQ(f)::B(H)+R(F),XR(g)
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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).