MESON Chess Problem Database

Problem Display
PID: 101053 (2r4n/Bqp2Q1K/2P4p/3Pp2r/3N1Np1/2Ppk3/1R5p/6bB w - - 0 1)

Kubbel, Evgeny Ivanovich

Good Companions (October), 1916

2r4n/Bqp2Q1K/2P4p/3Pp2r/3N1Np1/2Ppk3/1R5p/6bB

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6
      • 2.Sxc6#
    • 1...Qxb2
      • 2.Sb3#
    • 1...Qb3
      • 2.Sxb3#
      • 2.Sb5#
    • 1...Qb5
      • 2.Sxb5#
    • 1...d2
      • 2.Sc2#
    • 1...exd4
      • 2.Bxd4#
    • 1...exf4
      • 2.Sf5#
    • 1...e4
      • 2.Sg2#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Sg2#
        • 2.Qe4#
      • 1...Qxb2
        • 2.Sb3#
      • 1...exf4
        • 2.Qe4#
      • 1...d2
        • 2.Sc2#
        • 2.Sg2#
      • 1...e4
        • 2.Sg2#
        • 2.Qxe4#
      • 1...Rxf5!
  • Keys
    • 1.d6!
      • threat
        • 2.Sd5#
      • 1...Qxc6
        • 2.Sxc6#
      • 1...Qxb2
        • 2.Sb3#
      • 1...exd4
        • 2.Bxd4#
      • 1...exf4
        • 2.Sf5#
      • 1...d2
        • 2.Sc2#
      • 1...Qb3
        • 2.Sxb3#
        • 2.Sb5#
      • 1...Qb5
        • 2.Sxb5#
      • 1...e4
        • 2.Sg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(i);XP(G)::B(H)+S(D),XQ(i)
    • Q(i);N_GUARD,XR(B)::B(H)+S(D)
    • Q(i);N_GUARD::B(H)+S(D),XQ(i)
    • P(c);SBLOCK::B(H)+S(D),DCHECK
    • P(f);OGATE,P_SPINP(f),XS(D)::B(H),XP(f)
    • P(f);SBLOCK,XS(E)::B(H)+S(D),DCHECK
    • P(f);SBLOCK::S(E)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);N_GUARD,XR(B)::B(H)+S(D)
        • P(f);XS(E)::QAR1(I)
      • Refutation
        • R(g);XQ(I)
  • Actual
    • P(F);
    • Threat
      • S(E)
    • Vars
      • Q(i);XP(G)::B(H)+S(D),XQ(i)
      • Q(i);N_GUARD,XR(B)::B(H)+S(D)
      • P(f);OGATE,P_SPINP(f),XS(D)::B(H),XP(f)
      • P(f);SBLOCK,XS(E)::B(H)+S(D),DCHECK
      • P(c);SBLOCK::B(H)+S(D),DCHECK
      • Q(i);N_GUARD::B(H)+S(D),XQ(i)
      • P(f);SBLOCK::S(E)
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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).