MESON Chess Problem Database

Problem Display
PID: 87555 (3R1R2/3q4/8/3Npn2/1P2k3/1Q4P1/8/4K3 w - - 0 1)

Ivanovsky, Nikolai Aleksandrovich

Problemista, 1972

3R1R2/3q4/8/3Npn2/1P2k3/1Q4P1/8/4K3

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Sf6#
    • 1...Qb5
      • 2.Sf6#
    • 1...Qc8
      • 2.Sf6#
    • 1...Qe8
      • 2.Sf6#
    • 1...Qa7
      • 2.Sf6#
    • 1...Qb7
      • 2.Sf6#
    • 1...Qc7
      • 2.Sf6#
    • 1...Qh7
      • 2.Sf6#
    • 1...Sxg3
      • 2.Qc4#
    • 1...Sh4
      • 2.Qc4#
    • 1...Sh6
      • 2.Qc4#
    • 1...Se7
      • 2.Qc4#
    • 1...Sg7
      • 2.Qc4#
  • Keys
    • 1.Kd2!
      • threat
        • 2.Qd3#
      • 1...Qxd5+
        • 2.Qxd5#
      • 1...Kd4
        • 2.Qd3#
      • 1...Qb5
        • 2.Sf6#
      • 1...Sd4
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • Q(d);::S(E)
    • S(c);N_GUARD,XP(C)::QAR2(B)
    • S(c);N_GUARD::QAR2(B)
  • Actual
    • K(A);P_SPINS(E),S_FLIGHT
    • Threat
      • QAB1(B)
    • Vars
      • Q(d);CHECK,OGATE,XS(E)::QAB1(B),XQ(d)
      • K(a);N_PINS(E),P-FLIGHT::QAR1(B)
      • Q(d);N_PINS(E)::S(E)
      • S(c);N_PINS(E),SBLOCK::S(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).