MESON Chess Problem Database

Problem Display
PID: 157015 (B2bR1N1/6r1/1p1Q1pp1/1R1Pq3/2P1k1pN/4P3/3K4/8 w - - 0 1)

Andersen, Idon Bruno Hovedskou

Thema Danicum, 1982

B2bR1N1/6r1/1p1Q1pp1/1R1Pq3/2P1k1pN/4P3/3K4/8

#2

10 + 8

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Rxe6#
      • 2.Qf4#
      • 2.Qxe6#
    • 1...Qe7
      • 2.Sxf6#
      • 2.Qf4#
    • 1...Qxe8
      • 2.Qf4#
    • 1...Bc7
      • 2.Sxf6#
    • 1...f5
      • 2.Rxe5#
      • 2.Qxe5#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qd3#
      • 1...Qe6
        • 2.Rxe6#
      • 1...Qe7
        • 2.d6#
      • 1...Qxe8!
    • 1.Qb4?
      • threat
        • 2.Qb1#
        • 2.c5#
      • 1...Qe6
        • 2.Rxe6#
      • 1...Qe7
        • 2.d6#
      • 1...Rb7
        • 2.Qb1#
      • 1...Re7
        • 2.Qb1#
      • 1...Be7
        • 2.Qb1#
      • 1...Qxe8!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qxg4#
      • 1...Qxe6
        • 2.Rxe6#
      • 1...Re7
        • 2.Sxf6#
      • 1...Be7
        • 2.d6#
      • 1...g3
        • 2.Qg4#
      • 1...f5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_SPINQ(c),OGATE,XR(I)::QAR1(G)
    • B(h);N_GUARD::S(J),XP(e)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • Q(c);OGATEB::R(I),XQ(c)
        • Q(c);S_CUTR(g)::B(H)+P(F)
      • Refutation
        • Q(c);N_SPINQ(c),XR(I)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);OGATEB::R(I),XQ(c)
        • Q(c);S_CUTR(g)::B(H)+P(F)
        • R(g);::QAB(G)
        • R(g);N_SPINQ(c)::QAB(G)
        • B(h);N_SPINQ(c)::QAB(G)
      • Refutation
        • Q(c);N_SPINQ(c),XR(I)
  • Actual
    • Q(G);
    • Threat
      • QAR2(G),XP(b)
    • Vars
      • Q(c);OGATE,XQ(G)::R(I),XQ(c)
      • R(g);S_CUTB(h)::S(J),XP(e)
      • B(h);S_CUTR(g)::B(H)+P(F)
      • P(b);::QAR2(G)
      • P(e);N_GUARD::QAR1(G),XQ(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).