MESON Chess Problem Database

Problem Display
PID: 246399 (8/7K/2Q3B1/3p2B1/6N1/5krp/3pNprn/1R2bqn1 w - - 0 1)

Hjelle, David

Sjakk-Nytt, 1947

8/7K/2Q3B1/3p2B1/6N1/5krp/3pNprn/1R2bqn1

#2

7 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe2
      • 2.Se5#
    • 1...Sxg4
      • 2.Sd4#
  • Tries
    • 1.Qxd5+?
      • 1...Kxg4
        • 2.Rb4#
        • 2.Qf5#
      • 1...Kxe2!
    • 1.Qc4?
      • threat
        • 2.Se5#
        • 2.Rb3#
      • 1...Qxe2
        • 2.Qf4#
      • 1...Rxg4
        • 2.Rb3#
        • 2.Qd3#
      • 1...Sxe2
        • 2.Se5#
      • 1...Sxg4
        • 2.Sd4#
      • 1...d4
        • 2.Se5#
      • 1...d1Q
        • 2.Se5#
      • 1...d1S
        • 2.Se5#
      • 1...d1B
        • 2.Se5#
      • 1...d1R
        • 2.Se5#
      • 1...dxc4!
    • 1.Qf6+?
      • 1...Kxg4
        • 2.Qf4#
        • 2.Qf5#
      • 1...Kxe2!
  • Keys
    • 1.Qc2!
      • 1...Kxe2
        • 2.Qd1#
      • 1...Kxg4
        • 2.Qf5#
      • 1...Qxe2
        • 2.Qf5#
      • 1...Rxg4
        • 2.Qd3#
      • 1...Sxe2
        • 2.Se5#
      • 1...Sxg4
        • 2.Sd4#
      • 1...d1Q
        • 2.Se5#
      • 1...d1S
        • 2.Se5#
      • 1...d1B
        • 2.Se5#
      • 1...d1R
        • 2.Se5#
      • 1...d4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK,XS(B)::S(C)
    • S(g);SBLOCK,XS(C)::S(B)
  • Tries
    • Try
      • Q(E);CHECK,XP(k)
      • Refutation
        • K(h);S_FLIGHT,XS(B)
    • Try
      • Q(E);N_PINP(k)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);SBLOCK,XS(B)::QAR1(E)
        • S(c);XS(B)::S(C)
        • S(g);SBLOCK,XS(C)::S(B)
        • P(k);::S(C)
        • P(d);::S(C)
      • Refutation
        • P(k);XQ(E)
    • Try
      • Q(E);CHECK,N_PINP(k)
      • Refutation
        • K(h);S_FLIGHT,XS(B)
  • Actual
    • Q(E);N_PINP(k)
    • Vars
      • K(h);OGATEB,P_SPINP(d),S_FLIGHT,XS(B)::QAB1(E)
      • K(h);S_FLIGHT,XS(C)::QAB1(E)
      • Q(b);SBLOCK,XS(B)::QAR2(E)
      • R(i);SBLOCK,XS(C)::QAR2(E)
      • S(c);SBLOCK,XS(B)::S(C)
      • S(g);SBLOCK,XS(C)::S(B)
      • P(d);::S(C)
      • P(k);N_GUARD::QAB1(E)
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).