MESON Chess Problem Database

Problem Display
PID: 76927 (8/K1N5/pRpp1B2/pbk1nPp1/7q/2P5/1Q1N4/2R5 w - - 0 1)

Svyatov, Gennadi

Die Schwalbe, 1963

8/K1N5/pRpp1B2/pbk1nPp1/7q/2P5/1Q1N4/2R5

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qa3#
    • 1...Qf2
      • 2.Qa3#
    • 1...Qg3
      • 2.Qa3#
    • 1...Qh1
      • 2.Qa3#
    • 1...Qh2
      • 2.Qa3#
    • 1...Qh3
      • 2.Qa3#
    • 1...Qb4
      • 2.cxb4#
    • 1...Qd4
      • 2.cxd4#
    • 1...Qh5
      • 2.Qa3#
    • 1...Qh6
      • 2.Qa3#
    • 1...Qh7
      • 2.Qa3#
    • 1...Qh8
      • 2.Qa3#
    • 1...Bc4
      • 2.Qa3#
    • 1...Sc4
      • 2.Sb3#
    • 1...Sg4
      • 2.Bd4#
      • 2.Qa3#
    • 1...g4
      • 2.Qa3#
    • 1...d5
      • 2.Be7#
  • Tries
    • 1.Qa2?
      • threat
        • 2.Se6#
      • 1...d5
        • 2.Be7#
      • 1...Qh7
        • 2.Se4#
        • 2.Qa3#
      • 1...Bc4
        • 2.Qa3#
      • 1...Sc4
        • 2.Sb3#
      • 1...Qc4!
  • Keys
    • 1.c4!
      • threat
        • 2.Se6#
      • 1...Qxc4
        • 2.Se4#
      • 1...Bxc4
        • 2.Sb3#
      • 1...Sxc4
        • 2.Qa3#
      • 1...d5
        • 2.Be7#
      • 1...Qh7
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • Q(a);N_GUARD::QAB(B)
    • Q(a);OGATE::R(A)+P(D)DCHECK,XQ(a)
    • Q(a);N_GUARD,P_PINS(I)::QAB(B)
    • B(c);S_CUTQ(a)::QAB(B)
    • S(e);SBLOCK::S(C)
    • P(f);S_CUTQ(a)::QAB(B)
    • P(i);OGATEB::B(G)
  • Tries
    • Try
      • Q(B);
      • Threat
        • S(I)
      • Vars
        • P(i);OGATEB::B(G)
        • B(c);S_CUTQ(a)::QAB(B)
        • S(e);SBLOCK::S(C)
      • Refutation
        • Q(a);
  • Actual
    • P(D);
    • Threat
      • S(I)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XP(D)::S(C)
      • B(c);P_SPINB(c),XP(D)::S(C)
      • S(e);P_SPINS(e),XP(D)::QAB(B)
      • P(i);OGATEB::B(G)
      • Q(a);N_GUARD,P_PINS(I)::S(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).