MESON Chess Problem Database

Problem Display
PID: 102288 (8/8/3p4/3k4/1P1N1K2/4Pp2/3Nb3/2qQ4 w - - 0 1)

Stockman, Curt Sixten Gabriel

Svenska Dagbladet, 1920

8/8/3p4/3k4/1P1N1K2/4Pp2/3Nb3/2qQ4

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Qxf3#
    • 1...Bc4
      • 2.Qxf3#
    • 1...Bb5
      • 2.Qxf3#
    • 1...Ba6
      • 2.Qxf3#
  • Tries
    • 1.Qxc1?
      • threat
        • 2.Qc6#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Bb5!
    • 1.Qg1?
      • threat
        • 2.Qg5#
        • 2.Qg8#
        • 2.e4#
      • 1...Qxd2
        • 2.Qg8#
      • 1...Qb1
        • 2.Qg8#
      • 1...Qc2
        • 2.Qg8#
      • 1...Qc7
        • 2.Qg5#
        • 2.e4#
      • 1...Qc8
        • 2.e4#
      • 1...Bd3
        • 2.Qg8#
      • 1...f2
        • 2.Qg5#
        • 2.Qg8#
      • 1...Qxg1!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sb6#
      • 1...Qxe3+
        • 2.Sxe3#
      • 1...Kxc4
        • 2.Qb3#
      • 1...Qxc4
        • 2.e4#
      • 1...Bxc4
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(b);OGATE::QAB(A),XP(c)
  • Tries
    • Try
      • Q(A);XQ(a)
      • Threat
        • QAB1(A)
      • Vars
        • B(b);N_GUARD::QAB1(A),XB(b)
      • Refutation
        • B(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);P_PINP(C),XS(B)::QAB(A)
        • Q(a);::QAB(A)
        • Q(a);::P(C)
        • B(b);::QAB(A)
      • Refutation
        • Q(a);XQ(A)
  • Actual
    • S(B);P_SPINP(C)
    • Threat
      • S(B)
    • Vars
      • Q(a);CHECK,XP(C)::S(B),XQ(a)
      • K(d);OGATEB,S_FLIGHT,XS(B)::QAB1(A)
      • Q(a);N_PINP(C),P_PINS(E),SBLOCK,XS(B)::P(C)
      • B(b);OGATE,SBLOCK,XS(B)::QAB(A),XP(c)
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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).