MESON Chess Problem Database

Problem Display
PID: 26011 (4QNK1/n2P2p1/1n2R3/2kp2qR/1r5b/2P1N1p1/3P4/5BBb w - - 0 1)

Markovtsy, Vassyl Yuriovich

The Problemist, 2001

4QNK1/n2P2p1/1n2R3/2kp2qR/1r5b/2P1N1p1/3P4/5BBb

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.d4#
    • 1...Rb2
      • 2.d4#
    • 1...Rb3
      • 2.d4#
    • 1...Rb5
      • 2.d4#
    • 1...Sxd7
      • 2.Sxd7#
    • 1...d4
      • 2.Qe7#
  • Tries
    • 1.Sc2+?
      • 1...Qe3
        • 2.cxb4#
      • 1...Rd4
        • 2.Bxd4#
        • 2.cxd4#
      • 1...d4!
    • 1.cxb4+?
      • 1...Kd4
        • 2.Sc2#
        • 2.Sf5#
      • 1...Kxb4!
  • Keys
    • 1.d8S!
      • threat
        • 2.Sb7#
      • 1...Qxd8
        • 2.Sc4#
      • 1...Qe7
        • 2.Sc4#
      • 1...Sa4
        • 2.Sd7#
      • 1...Sc4
        • 2.d4#
      • 1...Sd7
        • 2.Sxd7#
      • 1...Sa8
        • 2.Sd7#
      • 1...Sbc8
        • 2.Sd7#
      • 1...d4
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::P(C)
    • S(h);XP(H)::S(J),XS(h)
    • P(f);P_SPINQ(g)::QAB(I)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • Q(g);P_SPINP(f),P_SPINQ(g)::P(D),XR(c)
      • Refutation
        • P(f);P_SPINP(f),P_SPINQ(g)
    • Try
      • P(D);CHECK,XR(c)
      • Refutation
        • K(e);S_FLIGHT,XP(D)
  • Actual
    • P(H);
    • Threat
      • S(H)
    • Vars
      • Q(g);N_GUARD,P_SPINP(f),XS(H)::B(B)+S(E)
      • Q(g);N_GUARD,P_SPINP(f)::B(B)+S(E)
      • S(h);N_GUARD::S(J)
      • S(h);S_CUTR(c)::P(C)
      • S(h);N_GUARD::S(J),XS(h)
      • P(f);P_SPINQ(g)::QAB(I)
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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).