MESON Chess Problem Database

Problem Display
PID: 165849 (1N5B/4pp2/KnR5/1RpkpQ1p/2qP2n1/b4p2/B1N5/7b w - - 0 1)

Dyachuk, Vasyl Vasilovich

1st Prize, Taras Shevchenko-200, 2014

1N5B/4pp2/KnR5/1RpkpQ1p/2qP2n1/b4p2/B1N5/7b

#2

9 + 12

23 Die Schwalbe 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qxe5#
    • 1...Sh2
      • 2.Qxe5#
    • 1...Se3
      • 2.Qxe5#
    • 1...Sf6
      • 2.Qxe5#
    • 1...Sh6
      • 2.Qxe5#
  • Tries
    • 1.Se3+?
      • 1...Sxe3
        • 2.Qxe5#
      • 1...Kxd4!
    • 1.Qd3?
      • threat
        • 2.dxc5#
        • 2.dxe5#
      • 1...exd4
        • 2.Qxd4#
      • 1...Bb2
        • 2.Sb4#
      • 1...Sf2
        • 2.Se3#
      • 1...Sf6
        • 2.Se3#
        • 2.dxc5#
      • 1...f6
        • 2.dxc5#
      • 1...e4!
    • 1.Qxg4?
      • threat
        • 2.Se3#
      • 1...exd4
        • 2.Qxd4#
      • 1...Bc1
        • 2.Sb4#
      • 1...hxg4!
    • 1.dxe5?
      • threat
        • 2.Qd3#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Bb2
        • 2.Rxc5#
      • 1...Sf2
        • 2.e6#
      • 1...Sf6
        • 2.e6#
      • 1...f6!
  • Keys
    • 1.dxc5!
      • threat
        • 2.Qd3#
      • 1...Bb2
        • 2.cxb6#
      • 1...Sf2
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • S(e);N_GUARD::QAR1(E),XP(h)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • S(e);XS(B)::QAR1(E),XP(h)
      • Refutation
        • K(g);N_SPINP(f),N_SPINQ(d),P-FLIGHT,P_SPINP(h),XP(C)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(h);N_SPINP(f),OGATE,P_SPINP(h),XP(C)::QAR1(E),XP(h)
        • B(b);N_GUARD::S(B)
        • S(e);N_GUARD::S(B)
        • P(l);::QAR(E)+P(C),XP(f)
      • Refutation
        • P(h);
    • Try
      • Q(E);XS(e)
      • Threat
        • S(B)
      • Vars
        • P(h);OGATE,XP(C)::QAR1(E),XP(h)
        • B(b);N_GUARD::S(B)
      • Refutation
        • P(i);XQ(E)
    • Try
      • P(C);XP(h)
      • Threat
        • QAR2(E)
      • Vars
        • S(e);OGATE,P_SPINS(e),XP(C)::QAR1(E),XS(e)
        • B(b);N_GUARD::R1(G),XP(f)
        • S(e);N_GUARD::QAR(E)+P(C)
      • Refutation
        • P(l);
  • Actual
    • P(C);P_PINP(h),XP(f)
    • Threat
      • QAR2(E)
    • Vars
      • B(b);N_GUARD::R(D)+P(C),XS(j)
      • S(e);N_GUARD::QAR1(E),XP(h)
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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).