MESON Chess Problem Database

Problem Display
PID: 19485 (8/3R4/B1pNN1Kb/8/1Qr5/1p1k4/1nbnpP2/2R1B3 w - - 0 1)

Hynonen, Veikko August

7th HM., Banska Bystrica (BABY) TT, 1959

8/3R4/B1pNN1Kb/8/1Qr5/1p1k4/1nbnpP2/2R1B3

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Rc3#
      • 2.Qc3#
    • 1...Bd1
      • 2.Rc3#
      • 2.Qc3#
    • 1...Bg7
      • 2.Qxd2#
    • 1...Bf8
      • 2.Qxd2#
    • 1...Sf1
      • 2.Qc3#
    • 1...Sf3
      • 2.Qc3#
  • Tries
    • 1.Sb5+?
      • 1...Rd4
        • 2.Sc5#
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Ke4!
    • 1.Bxc4+?
      • 1...Sdxc4
        • 2.Qc3#
      • 1...Sbxc4!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qd4#
      • 1...Kc3+
        • 2.Se4#
      • 1...Be3
        • 2.Qxe3#
      • 1...Bg7
        • 2.Qe3#
      • 1...Sf3
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(i);N_GUARD::QAR1(D),XS(c)
    • S(c);::QAR1(D)
  • Tries
    • Try
      • S(F);CHECK,N_PINR(g)
      • Refutation
        • K(f);P_SPINR(g),S_FLIGHT
    • Try
      • B(E);CHECK,XR(g)
      • Vars
        • S(c);XB(E)::QAR1(D)
      • Refutation
        • S(a);XB(E)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • K(f);CHECK,P-FLIGHT,P_SPINB(b),P_SPINS(c)::S(F)
      • B(i);N_GUARD::QAR1(D),XB(i)
      • B(i);N_GUARD::QAR1(D)
      • S(c);N_GUARD::QAB(D)
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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).