MESON Chess Problem Database

Problem Display
PID: 153539 (4r3/b7/2n2pNN/3p1Qpq/rB4pp/5Pk1/2n3P1/5R1K w - - 0 1)

Grabowski, Kazimierz

Good Companions (March), 1916

4r3/b7/2n2pNN/3p1Qpq/rB4pp/5Pk1/2n3P1/5R1K

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg6
      • 2.Qxg4#
    • 1...Qxh6
      • 2.Qxg4#
    • 1...Se3
      • 2.Be1#
    • 1...gxf3
      • 2.Qh3#
  • Tries
    • 1.Qe5+?
      • 1...Sxe5
        • 2.Sf5#
      • 1...fxe5
        • 2.Sf5#
      • 1...Rxe5!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Sf5#
      • 1...Qxg6
        • 2.Qxg4#
      • 1...Qxh6
        • 2.Qxg4#
      • 1...gxf3
        • 2.Qh3#
      • 1...Se3
        • 2.Be1#
      • 1...S2d4
        • 2.Be1#
      • 1...S6d4
        • 2.Bd6#
      • 1...Se7
        • 2.Qd6#
      • 1...f5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(h);N_GUARD,XS(G)::QAR1(F),XP(d)
    • Q(h);N_GUARD,XS(H)::QAR1(F),XP(d)
    • S(a);N_GUARD,S_CUTB(k),S_CUTR(l)::B(E)
    • P(d);OGATE,XP(D)::QAR1(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • S(i);XQ(F)::S(H)
        • P(j);XQ(F)::S(H)
      • Refutation
        • R(l);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • S(H)
    • Vars
      • Q(h);N_GUARD,XS(G)::QAR1(F),XP(d)
      • Q(h);N_GUARD,XS(H)::QAR1(F),XP(d)
      • P(d);OGATE,XP(D)::QAR1(F)
      • S(a);N_GUARD,S_CUTB(k)::B(E)
      • S(i);N_GUARD,S_CUTR(c)::B(E)
      • S(i);N_GUARD,S_CUTR(l)::QAB(F)
      • P(j);::S(H),XP(j)
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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).