MESON Chess Problem Database

Problem Display
PID: 144049 (2r1bbK1/2pk1n1Q/R1N3Pp/7p/4N1r1/B6B/8/5R2 w - - 0 1)

Gugel, Lev Nikolaevich

Magyar Sakkvilag, 1930

2r1bbK1/2pk1n1Q/R1N3Pp/7p/4N1r1/B6B/8/5R2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...h4
      • 2.Bxg4#
  • Tries
    • 1.Rd1+?
      • 1...Bd6
        • 2.Sc5#
      • 1...Ke6!
    • 1.Qxf7+?
      • 1...Be7
        • 2.Sf6#
        • 2.Rd1#
        • 2.Qf5#
        • 2.Qxe7#
      • 1...Bxf7+!
  • Keys
    • 1.g7!
      • threat
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Sg5
        • 2.gxf8S#
      • 1...Sd6
        • 2.Sc5#
      • 1...Sd8
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(b);N_GUARD::B(C),XR(a)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • B(i);P_SPINB(i)::S(D)
      • Refutation
        • K(e);N_SPINS(f),S_FLIGHT
    • Try
      • Q(H);CHECK,XS(f)
      • Refutation
        • B(h);CHECK,XQ(H)
  • Actual
    • P(G);N_PINS(f)
    • Threat
      • QAB(H)
    • Vars
      • K(e);S_FLIGHT::QAB1(H)
      • S(f);N_PINP(G)::PXB(i)=S
      • S(f);SBLOCK,S_CUTB(i)::S(D)
      • S(f);N_GUARD,SBLOCK::S(F)
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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).