MESON Chess Problem Database

Problem Display
PID: 119785 (1N6/k1P5/2nP4/2p4b/K3Q3/b4B2/8/8 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Schweizerische Schachzeitung, 1912

1N6/k1P5/2nP4/2p4b/K3Q3/b4B2/8/8

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Qb7#
    • 1...Sd4
      • 2.Qb7#
    • 1...Se5
      • 2.Qb7#
    • 1...Se7
      • 2.Qb7#
    • 1...Sxb8
      • 2.Qb7#
  • Tries
    • 1.Qxc6?
      • threat
        • 2.Qb7#
        • 2.Qa6#
      • 1...Bxf3
        • 2.Qa6#
      • 1...Be8!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qa6#
      • 1...Kb6
        • 2.Qa6#
      • 1...Kb7
        • 2.Qa6#
      • 1...Ka8
        • 2.Qa6#
      • 1...Sxb8
        • 2.c8S#
      • 1...Sb4
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(d);OGATE::QAR1(C)
    • S(d);OGATE,XS(F)::QAR1(C)
  • Tries
    • Try
      • Q(C);XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • B(c);XB(A)::QAR1(C)
      • Refutation
        • B(c);P_PINQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(e);S_FLIGHT::QAR1(C)
      • K(e);P-FLIGHT,P_SPINS(d)::QAB1(C)
      • K(e);P-FLIGHT,P_SPINS(d)::QAR2(C)
      • S(d);SBLOCK,XS(F)::P=S
      • S(d);S_CUTB(a)::QAB(C),XP(b)
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).