MESON Chess Problem Database

Problem Display
PID: 9827 (8/4r1n1/8/Q4N2/5k2/3P1N1K/7n/7B w - - 0 1)

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

1st Prize, Sydsvenska Dagbladet Snallposten, 1910

8/4r1n1/8/Q4N2/5k2/3P1N1K/7n/7B

#2

6 + 4

5007 Zadachi i Etyudi 1995
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxe5#
    • 1...Ra7
      • 2.Qe5#
    • 1...Rb7
      • 2.Qe5#
    • 1...Rc7
      • 2.Qe5#
    • 1...Rd7
      • 2.Qe5#
    • 1...Rf7
      • 2.Qe5#
    • 1...Se6
      • 2.Qe5#
  • Tries
    • 1.S5h4?
      • threat
        • 2.Qg5#
      • 1...Ke3
        • 2.Qd2#
      • 1...Sxf3
        • 2.Sg2#
      • 1...Re5
        • 2.Qxe5#
      • 1...Se6
        • 2.Qd2#
        • 2.Qe5#
      • 1...Sf5!
    • 1.Sxe7?
      • threat
        • 2.Qd2#
        • 2.Qe5#
        • 2.Qg5#
      • 1...Ke3
        • 2.Qd2#
      • 1...Sf5
        • 2.Sd5#
        • 2.Qe5#
      • 1...Sf1
        • 2.Qe5#
        • 2.Qg5#
      • 1...Sg4
        • 2.Qg5#
      • 1...Se6
        • 2.Qd2#
        • 2.Qe5#
      • 1...Sxf3!
    • 1.Sxg7?
      • threat
        • 2.Qg5#
      • 1...Ke3
        • 2.Qd2#
      • 1...Rxg7
        • 2.Qe5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Sxf3!
    • 1.Qb4+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Kxf5!
    • 1.Qa4+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Kxf5!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qg5#
      • 1...Kxe3
        • 2.Qd2#
      • 1...Sxf3
        • 2.Sg2#
      • 1...Re5
        • 2.Qxe5#
      • 1...Sf5
        • 2.Sd5#
      • 1...Se6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD::QAB1(E),XR(c)
    • R(c);N_GUARD::QAB1(E)
    • S(d);S_CUTR(c)::QAB1(E)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB1(E)
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
        • S(a);SBLOCK,XS(C)::S(F)
        • R(c);N_GUARD::QAB1(E),XR(c)
      • Refutation
        • S(d);
    • Try
      • S(F);XR(c)
      • Threat
        • DUALS(3)
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
        • S(a);::QAB1(E)
      • Refutation
        • S(a);XS(C)
    • Try
      • S(F);XS(d)
      • Threat
        • QAB1(E)
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
        • R(c);N_GUARD,XS(F)::QAB1(E)
        • R(c);N_GUARD::QAB1(E),XR(c)
      • Refutation
        • S(a);XS(C)
    • Try
      • Q(E);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(E),XR(c)
      • Refutation
        • K(b);P-FLIGHT,XS(F)
    • Try
      • Q(E);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(E),XR(c)
      • Refutation
        • K(b);P-FLIGHT,XS(F)
  • Actual
    • S(F);
    • Threat
      • QAB1(E)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(F)::QAB1(E)
      • S(a);SBLOCK,XS(C)::S(F)
      • R(c);N_GUARD::QAB1(E),XR(c)
      • S(d);SBLOCK::S(F)
      • S(d);S_CUTR(c)::QAB1(E)
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).