MESON Chess Problem Database

Problem Display
PID: 184294 (6K1/1b3Q2/1N4p1/4p1b1/4kNP1/Rn3n1R/3p1P2/7q w - - 0 1)

Hermanson, Halvar

The Problemist, 1980

6K1/1b3Q2/1N4p1/4p1b1/4kNP1/Rn3n1R/3p1P2/7q

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qc4#
    • 1...Sbd4
      • 2.Re3#
    • 1...Sfd4
      • 2.Re3#
  • Tries
    • 1.Se6?
      • threat
        • 2.Qxg6#
      • 1...Sbd4
        • 2.Sc5#
      • 1...Sfd4
        • 2.Sxg5#
      • 1...Sh4
        • 2.Qxb7#
      • 1...Kd3!
    • 1.Ra4+?
      • 1...Sfd4
        • 2.Re3#
      • 1...Sbd4!
    • 1.Qxg6+?
      • 1...Kxf4
        • 2.Qf5#
      • 1...Kd4!
  • Keys
    • 1.Se2!
      • threat
        • 2.Qxg6#
      • 1...Kd3
        • 2.Qc4#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bc8
        • 2.Qd5#
      • 1...Sbd4
        • 2.Sg3#
      • 1...Sfd4
        • 2.Sc3#
      • 1...Sh4
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(e);P-FLIGHT::QAR1(G)
    • S(c);OGATE,SBLOCK::R1(B)
    • S(d);OGATE,SBLOCK::R1(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB(G),XP(h)
      • Vars
        • S(c);N_GUARD,SBLOCK::S(D)
        • S(d);N_GUARD,SBLOCK::S(D),XB(g)
        • S(d);::QAB(G),XB(i)
      • Refutation
        • K(e);P_SPINS(c),S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • S(d);OGATE,P_SPINS(d)::R1(C)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(G);CHECK,XP(h)
      • Vars
        • K(e);P-FLIGHT,XS(D)::QAR1(G)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAB(G),XP(h)
    • Vars
      • K(e);P_SPINS(c),S_FLIGHT::QAB1(G)
      • B(i);N_GUARD,P_PINQ(G)::QAB1(G),XB(i)
      • B(i);N_GUARD::QAB1(G)
      • S(c);SBLOCK::S(D)
      • S(d);SBLOCK::S(D)
      • S(d);::QAB(G),XB(i)
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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).