MESON Chess Problem Database

Problem Display
PID: 157949 (1n2N3/BP6/2k2p2/5B2/P1q1PKb1/8/4N3/1R5Q w - - 0 1)

Antonov, Yuri Mikhailovich

Probleemblad, 1973

1n2N3/BP6/2k2p2/5B2/P1q1PKb1/8/4N3/1R5Q

#2

10 + 5

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Sd4#
    • 1...Qd5
      • 2.exd5#
    • 1...Qa6
      • 2.Sd4#
    • 1...Qf7
      • 2.Sd4#
    • 1...Qg8
      • 2.Sd4#
    • 1...Qc1+
      • 2.Qxc1#
    • 1...Qc2
      • 2.Sd4#
    • 1...Qd4
      • 2.Sxd4#
    • 1...Qxe4+
      • 2.Qxe4#
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qc7#
      • 1...Qc1+
        • 2.Rxc1#
      • 1...Qxe4+
        • 2.Bxe4#
      • 1...Qf7
        • 2.Sd4#
      • 1...Sa6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD,N_PINP(E)::S(C)
    • Q(a);N_PINP(E)::P(E),XQ(a)
    • Q(a);CHECK,N_PINP(E),OGATEB::QAR(B),XQ(a)
    • Q(a);N_GUARD::S(C),XQ(a)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XP(E)::QAB(B),XQ(a)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • Q(a);CHECK,N_PINP(E),OGATEB::R(A),XQ(a)
      • Q(a);CHECK,OGATE,XP(E)::B(G),XQ(a)
      • Q(a);N_GUARD,N_PINP(E)::S(C)
      • S(e);N_GUARD::QAB1(B)
      • S(e);N_GUARD::QAB1(B),XS(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).