MESON Chess Problem Database

Problem Display
PID: 246392 (n2b1Q2/q1p3pb/2P5/2N1knpN/rR4P1/2P5/B3P3/5RK1 w - - 0 1)

Hjelle, David

Sjakk-Nytt, 1946

n2b1Q2/q1p3pb/2P5/2N1knpN/rR4P1/2P5/B3P3/5RK1

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc5+
      • 2.Qxc5#
    • 1...Qb8
      • 2.Sd3#
      • 2.Sd7#
    • 1...Qa5
      • 2.Sd3#
      • 2.Sd7#
    • 1...Qa6
      • 2.Sd7#
    • 1...Qb7
      • 2.Sd3#
      • 2.Sd7#
    • 1...Ra3
      • 2.Re4#
    • 1...Ra5
      • 2.Re4#
    • 1...Ra6
      • 2.Re4#
    • 1...Bg8
      • 2.Rxf5#
    • 1...Se3
      • 2.Sd7#
    • 1...Sd4
      • 2.cxd4#
    • 1...Sb6
      • 2.Sd3#
  • Tries
    • 1.Qxd8?
      • threat
        • 2.Qd5#
      • 1...Rxa2
        • 2.Re4#
      • 1...Bg8
        • 2.Rxf5#
      • 1...Se3
        • 2.Qe7#
        • 2.Qd4#
      • 1...Sd6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#
        • 2.Qd4#
      • 1...Sb6
        • 2.Sd3#
      • 1...Qxc5+!
  • Keys
    • 1.Rd1!
      • threat
        • 2.Rd5#
      • 1...Qxc5+
        • 2.Qxc5#
      • 1...Rxa2
        • 2.Re4#
      • 1...Bg8
        • 2.Qxf5#
      • 1...Se3
        • 2.Sd7#
      • 1...Sd4
        • 2.cxd4#
      • 1...Se7
        • 2.Qxg7#
      • 1...Sb6
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(e);CHECK,OGATE,XS(H)::QAR2(K),XQ(e)
    • Q(e);N_PINS(H)::S(H)
    • R(a);N_GUARD::R1(F)
    • B(h);N_GUARD::R1(A),XS(c)
    • S(c);N_PINS(H)::S(H)
    • S(c);N_PINS(H),OGATE::P(E),XS(c)
    • S(i);N_PINS(H)::S(H)
  • Tries
    • Try
      • Q(K);XB(j)
      • Threat
        • QAR1(K)
      • Vars
        • R(a);N_GUARD,XB(C)::R1(F)
        • B(h);N_GUARD::R1(A),XS(c)
        • S(c);N_GUARD::QAR2(K)
        • S(i);N_PINS(H)::S(H)
      • Refutation
        • Q(e);CHECK,XS(H)
  • Actual
    • R(A);
    • Threat
      • R1(A)
    • Vars
      • Q(e);CHECK,OGATE,XS(H)::QAR2(K),XQ(e)
      • R(a);N_GUARD,XB(C)::R1(F)
      • B(h);N_GUARD::QAR1(K),XS(c)
      • S(c);N_PINS(H)::S(H)
      • S(c);N_PINS(H),OGATE::P(E),XS(c)
      • S(c);N_GUARD,S_CUTB(j)::QAB(K),XP(g)
      • S(i);N_PINS(H)::S(H)
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).