MESON Chess Problem Database

Problem Display
PID: 120046 (8/K3p3/1N6/k3r3/1p6/N4b2/2PQ4/8 w - - 0 1)

Svedberg, Erik Daniel

Tidskrift for Schack, 1929

8/K3p3/1N6/k3r3/1p6/N4b2/2PQ4/8

#2

5 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qd5#
    • 1...Rb5
      • 2.Sac4#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Sac4#
        • 2.Sbc4#
        • 2.Qa4#
      • 1...bxa3
        • 2.Qa4#
      • 1...b3
        • 2.Qa4#
        • 2.Qd2#
      • 1...Re4
        • 2.Qa4#
        • 2.Qb5#
        • 2.Qd5#
      • 1...Rb5
        • 2.Sac4#
        • 2.Qxb5#
      • 1...Rc5
        • 2.Qa4#
      • 1...Be2
        • 2.Qa4#
      • 1...Bd5
        • 2.Qa4#
        • 2.Qb5#
      • 1...Bc6!
  • Keys
    • 1.c3!
      • threat
        • 2.cxb4#
      • 1...bxa3
        • 2.c4#
      • 1...bxc3
        • 2.Qxc3#
      • 1...Re4
        • 2.Qd5#
      • 1...Rb5
        • 2.Sac4#
      • 1...b3
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(d);N_GUARD,S_CUTB(a)::QAR(B)
    • R(d);SBLOCK::S(C)
  • Tries
    • Try
      • Q(B);N_PINP(b)
      • Threat
        • DUALS(3)
      • Vars
        • P(b);XS(C)::QAR1(B)
        • R(d);::QAR1(B)
        • B(a);::QAR1(B)
      • Refutation
        • B(a);
  • Actual
    • P(A);N_PINP(b)
    • Threat
      • P(A),XP(b)
    • Vars
      • P(b);XS(C)::QAB(B)+P(A)
      • P(b);OGATE,P_SPINP(b),XP(A)::QAB(B),XP(b)
      • R(d);N_GUARD,S_CUTB(a)::QAR(B)
      • R(d);SBLOCK::S(C)
      • P(b);::QAB(B)+P(A)
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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).