MESON Chess Problem Database

Problem Display
PID: 67400 (4K3/4NR2/1pQ5/8/8/1Np1k1P1/R1r1qb1n/5B2 w - - 0 1)

Yaroslavtsev, Arkady Ivanovich

1st Comm., Moscow Ty., 1991

4K3/4NR2/1pQ5/8/8/1Np1k1P1/R1r1qb1n/5B2

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sf5#
      • 2.Qe6#
    • 1...Qc4
      • 2.Sf5#
    • 1...Qa6
      • 2.Sf5#
      • 2.Qe6#
    • 1...Qe1
      • 2.Sf5#
      • 2.Qe6#
    • 1...Qd2
      • 2.Sf5#
      • 2.Qe6#
  • Tries
    • 1.Qxc3+?
      • 1...Ke4
        • 2.Rf4#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Rxc3!
  • Keys
    • 1.Ra4!
      • threat
        • 2.Qe4#
      • 1...Kd3
        • 2.Qe4#
      • 1...Qd3
        • 2.Qh6#
      • 1...Qf3
        • 2.Qxb6#
      • 1...Qc4
        • 2.Sf5#
      • 1...Qg4
        • 2.Sd5#
      • 1...Qb5
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(b);::S(F)
  • Tries
    • Try
      • Q(E);CHECK,XP(e)
      • Vars
        • K(f);P-FLIGHT::R1(G)
        • Q(b);N_GUARD,P_SPINQ(b)::QAR1(E),XQ(b)
      • Refutation
        • R(a);XQ(E)
  • Actual
    • R(B);
    • Threat
      • QAR1(E)
    • Vars
      • K(f);P-FLIGHT,P_PINS(F),P_SPINQ(b)::QAB1(E)
      • Q(b);::QAB(E)
      • Q(b);::QAB(E),XP(g)
      • Q(b);::S(F)
      • Q(b);P_PINQ(E)::R1(B)
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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).