MESON Chess Problem Database

Problem Display
PID: 162759 (3Q4/1qp4b/1b2p3/1B4p1/3Pk1P1/3Np2K/2nPR1P1/8 w - - 0 1)

Tkachenko, Sergiy Ivanovich

Die Schwalbe, 2016

3Q4/1qp4b/1b2p3/1B4p1/3Pk1P1/3Np2K/2nPR1P1/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Rxe3#
    • 1...Se1
      • 2.Rxe3#
    • 1...Sa3
      • 2.Rxe3#
    • 1...Sb4
      • 2.Rxe3#
    • 1...Sxd4
      • 2.Rxe3#
  • Tries
    • 1.Qxg5?
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qe5#
      • 1...Bxd4
        • 2.Sf2#
      • 1...e5
        • 2.Qxe5#
      • 1...Qd5
        • 2.Qf4#
      • 1...Bf5!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
      • 1...Bxd4
        • 2.Qf3#
      • 1...e5
        • 2.Qxe5#
      • 1...Qd5
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::R1(B),XP(b)
    • S(a);N_GUARD,XP(F)::R1(B),XP(b)
  • Tries
    • Try
      • Q(I);XP(d)
      • Threat
        • QAR1(I)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT,XP(F)::QAB1(I)
        • B(e);SBLOCK,XP(F)::S(D)
        • P(f);::QAR1(I),XP(f)
        • Q(g);SBLOCK::QAR1(I)
      • Refutation
        • B(i);P_PINP(G)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • K(c);N_SPINP(b),S_FLIGHT::QAR1(I)
      • B(e);SBLOCK,XP(F)::QAB1(I)
      • P(f);::QAR1(I),XP(f)
      • Q(g);SBLOCK::S(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).