MESON Chess Problem Database

Problem Display
PID: 231205 (5Kn1/2b1N3/3Pp3/4k3/1B3p1Q/3P1p1b/2N1Pr2/8 w - - 0 1)

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

Zadachi i Etyudi, 1927

5Kn1/2b1N3/3Pp3/4k3/1B3p1Q/3P1p1b/2N1Pr2/8

#2

8 + 8

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Qg5#
    • 1...Bg2
      • 2.Qg5#
    • 1...Bxd6
      • 2.Bc3#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Sdc6#
      • 1...Kxd4
        • 2.Qxf4#
      • 1...Sxe7!
    • 1.Qh5+?
      • 1...Kf6
        • 2.Sxg8#
      • 1...Bf5!
    • 1.e4?
      • threat
        • 2.Sc6#
        • 2.Sg6#
      • 1...Bxd6
        • 2.Bc3#
      • 1...Sxe7
        • 2.Qh8#
      • 1...fxe4 ep
        • 2.Qd4#
        • 2.d4#
      • 1...Bf5
        • 2.Sc6#
      • 1...Rg2
        • 2.Sc6#
      • 1...Rxc2!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sc6#
      • 1...Kd4
        • 2.Qxf4#
      • 1...Bxd6
        • 2.Bc3#
      • 1...Sxe7
        • 2.Qh8#
      • 1...fxe3
        • 2.d4#

This is a version

Version by Aleksandr Zigurov.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(c);N_GUARD::QAR2(E)
    • B(g);P_PINS(G),SBLOCK,XP(F)::B(D)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • K(e);P_SPINP(d),S_FLIGHT,XS(A)::QAR2(E),XP(d)
      • Refutation
        • S(h);XS(G)
    • Try
      • Q(E);CHECK
      • Vars
        • K(e);S_FLIGHT::S(G),XS(h)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);P_PINS(G),SBLOCK,XP(F)::B(D)
        • S(h);N_GUARD,XS(G)::QAB(E)
        • B(c);::S(G)
        • R(a);::S(G)
      • Refutation
        • R(a);XS(A)
  • Actual
    • S(A);
    • Threat
      • S(G)
    • Vars
      • K(e);P_SPINP(d),S_FLIGHT::QAR2(E),XP(d)
      • B(g);P_PINS(G),SBLOCK,XP(F)::B(D)
      • S(h);N_GUARD,XS(G)::QAB(E)
      • P(d);XS(A)::P(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).