MESON Chess Problem Database

Problem Display
PID: 262740 (3K4/8/7p/pR1p1p1r/2k1p1Q1/1RNb1q2/2NPP3/2b2B2 w - - 0 1)

Markovtsy, Vassyl Yuriovich

3rd Comm., SuperProblem, 2018

3K4/8/7p/pR1p1p1r/2k1p1Q1/1RNb1q2/2NPP3/2b2B2

#2

9 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.exd3#
    • 1...Qg2
      • 2.exd3#
    • 1...Qf2
      • 2.exd3#
    • 1...a4
      • 2.R3b4#
    • 1...d4
      • 2.Qg8#
    • 1...f4
      • 2.Qc8#
  • Tries
    • 1.Sa3+?
      • 1...Kd4
        • 2.Rxd5#
        • 2.Qg7#
      • 1...Bxa3!
    • 1.Se3+?
      • 1...Kd4
        • 2.Rxd5#
        • 2.Qg7#
      • 1...Qxe3!
    • 1.Sxd5?
      • threat
        • 2.Sb6#
      • 1...Qf2
        • 2.exd3#
      • 1...Qe3
        • 2.Sdxe3#
      • 1...Bxc2!
    • 1.Qg8?
      • threat
        • 2.Qxd5#
      • 1...e3
        • 2.exd3#
      • 1...f4!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Sd6#
      • 1...Qxe4
        • 2.exd3#
      • 1...Bxe4
        • 2.exf3#
      • 1...dxe4
        • 2.Qg8#
      • 1...fxe4
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(c);N_GUARD::P(D),XB(b)
    • P(f);N_GUARD::R1(E)
    • P(g);N_SPINP(e),OGATEB::QAB(G)
    • P(h);N_SPINP(e),OGATE::QAR(G)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • B(a);XS(B)
    • Try
      • S(B);CHECK
      • Refutation
        • Q(c);XS(B)
    • Try
      • S(F);XP(g)
      • Threat
        • S(F)
      • Vars
        • Q(c);N_GUARD::P(D),XB(b)
        • Q(c);N_GUARD::S(F),XQ(c)
      • Refutation
        • B(b);XS(B)
    • Try
      • Q(G);N_PINP(e),P_PINP(g)
      • Threat
        • QAB1(G),XP(g)
      • Vars
        • P(e);N_GUARD,S_CUTQ(c)::P(D),XB(b)
      • Refutation
        • P(h);
  • Actual
    • S(F);XP(e)
    • Threat
      • QAR(G)+S(F),DCHECK
    • Vars
      • Q(c);N_GUARD,P_SPINQ(c),XS(F)::P(D),XB(b)
      • B(b);P_SPINB(b),XS(F)::B(A)+P(D),XQ(c)
      • P(g);OGATEB,P_SPINP(g),XS(F)::QAB(G)
      • P(h);OGATE,P_SPINP(h),XS(F)::QAR(G)
HTML5 logo

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).