MESON Chess Problem Database

Problem Display
PID: 117403 (1b5K/1B1pN1Q1/7p/Bk2P1R1/pP2N1r1/3P4/8/q7 w - - 0 1)

Livshits, Eduard Yakovlevich

Schweizerische Schachzeitung, 1959

1b5K/1B1pN1Q1/7p/Bk2P1R1/pP2N1r1/3P4/8/q7

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Sxc3#
    • 1...Qxe5
      • 2.Sc3#
    • 1...Qb1
      • 2.Sc3#
    • 1...Qd1
      • 2.Sc3#
    • 1...Qf1
      • 2.Sc3#
    • 1...Qg1
      • 2.Sc3#
    • 1...Qh1
      • 2.Sc3#
    • 1...Qa2
      • 2.Sc3#
    • 1...Bxe5
      • 2.Sd6#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Ba7
      • 2.Sd6#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qxd7#
      • 1...Qxe5
        • 2.Sdc3#
      • 1...Bxe5
        • 2.Sc7#
      • 1...Qc3
        • 2.Sexc3#
        • 2.Sdxc3#
      • 1...d6
        • 2.Qd7#
      • 1...Qc1!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qxd7#
      • 1...Qxe5
        • 2.Sd4#
      • 1...Bxe5
        • 2.Sfd6#
      • 1...Qc3
        • 2.Sxc3#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Qc1
        • 2.Sd4#
      • 1...d5
        • 2.Qd7#
      • 1...d6
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::S(C),XQ(a)
    • Q(a);N_GUARD,P_PINQ(I),P_SPINQ(a),XP(E)::S(C)
    • Q(a);N_GUARD::S(C)
    • B(g);N_GUARD,P_PINQ(I),P_SPINB(g),XP(E)::S(C)
    • B(g);N_GUARD::S(C),XB(g)
    • B(g);N_GUARD::S(C)
  • Tries
    • Try
      • S(H);
      • Threat
        • QAB(I),XP(f)
      • Vars
        • Q(a);N_GUARD,P_PINQ(I),XP(E)::S(H)
        • B(g);N_GUARD,P_PINQ(I),XP(E)::S(H)
        • P(f);::QAB(I)
      • Refutation
        • Q(a);
  • Actual
    • S(H);
    • Threat
      • QAB(I),XP(f)
    • Vars
      • Q(a);N_GUARD,P_PINQ(I),XP(E)::S(H)
      • B(g);N_GUARD,P_PINQ(I),XP(E)::S(H)
      • Q(a);N_GUARD::S(C),XQ(a)
      • Q(a);N_GUARD::S(H),XQ(a)
      • Q(a);N_GUARD::S(H)
      • P(f);::QAB(I)
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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).