MESON Chess Problem Database

Problem Display
PID: 157154 (N1QnR3/5P1K/3p1P2/1pbk3B/5Pp1/1n1P3b/2N5/8 w - - 0 1)

Hermanson, Halvar

Schackvarlden, 1925

N1QnR3/5P1K/3p1P2/1pbk3B/5Pp1/1n1P3b/2N5/8

#2

10 + 8

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Sb6#
    • 1...Bb4
      • 2.Sb6#
    • 1...Bd4
      • 2.Sb4#
    • 1...Bb6
      • 2.Sxb6#
    • 1...Sd4
      • 2.Se3#
    • 1...Sc6
      • 2.Sc7#
      • 2.Qe6#
    • 1...Se6
      • 2.Qb7#
    • 1...Sb7
      • 2.Qxb7#
    • 1...Sxf7
      • 2.Bxf7#
      • 2.Qb7#
    • 1...g3
      • 2.Bf3#
  • Tries
    • 1.Qb7+?
      • 1...Sc6
        • 2.Sc7#
      • 1...Sxb7!
    • 1.Qd7?
      • threat
        • 2.Sc7#
        • 2.Re5#
      • 1...Sxf7
        • 2.Sc7#
        • 2.Bxf7#
        • 2.Qb7#
      • 1...Bg1
        • 2.Re5#
      • 1...Bf2
        • 2.Re5#
      • 1...Ba3
        • 2.Re5#
      • 1...Be3
        • 2.Re5#
      • 1...Bb4
        • 2.Re5#
      • 1...Bb6
        • 2.Re5#
      • 1...Ba7
        • 2.Re5#
      • 1...Sc6
        • 2.Sc7#
        • 2.Qe6#
      • 1...Se6
        • 2.Qb7#
      • 1...Bd4!
    • 1.Qc6+?
      • 1...Sxc6
        • 2.Sc7#
      • 1...Kxc6!
  • Keys
    • 1.Rg8!
      • threat
        • 2.Rg5#
      • 1...Sxf7
        • 2.Bxf7#
      • 1...Bd4
        • 2.Sb4#
      • 1...Sd4
        • 2.Se3#
      • 1...Sc6
        • 2.Sc7#
      • 1...Se6
        • 2.Qb7#
      • 1...g3
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(e);N_GUARD::S(H)
    • B(e);N_GUARD,SBLOCK::S(A)
    • B(e);N_GUARD::S(H),XB(e)
    • S(a);SBLOCK,S_CUTB(e)::S(A)
    • S(h);N_GUARD::QAB(I)
    • S(h);N_GUARD::QAB(I),XS(h)
    • P(c);OGATE::B(D)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • S(h);P_SPINS(h)::S(H)
      • Refutation
        • S(h);XQ(I)
    • Try
      • Q(I);P_PINP(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);::R1(J)
        • S(h);N_GUARD::QAB(I)
      • Refutation
        • B(e);
    • Try
      • Q(I);CHECK
      • Vars
        • S(h);SBLOCK,XQ(I)::S(H)
      • Refutation
        • K(f);S_FLIGHT,XQ(I)
  • Actual
    • R(J);
    • Threat
      • R(J)
    • Vars
      • S(h);OGATE,XP(F)::B(D),XS(h)
      • B(e);N_GUARD,SBLOCK::S(A)
      • S(a);SBLOCK,S_CUTB(e)::S(A)
      • S(h);SBLOCK::S(H)
      • S(h);N_GUARD,SBLOCK::QAB(I)
      • P(c);OGATE::B(D)
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).