MESON Chess Problem Database

Problem Display
PID: 11151 (2b4B/K6N/2p5/R3n1p1/N1P1k3/6rB/2n1PP2/1Q1R4 w - - 0 1)

Gugel, Lev Nikolaevich

1/2 Prize, 64 Shakhmatnoe obozrenie, 1937

2b4B/K6N/2p5/R3n1p1/N1P1k3/6rB/2n1PP2/1Q1R4

#2

11 + 7

3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc4
      • 2.Rd4#
    • 1...Sg4
      • 2.Rd4#
    • 1...Sg6
      • 2.Rd4#
    • 1...Sd7
      • 2.Rd4#
    • 1...Sf7
      • 2.Rd4#
  • Tries
    • 1.Sc3+?
      • 1...Kf4
        • 2.Bxe5#
      • 1...Rxc3!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qxe5#
      • 1...Kf4
        • 2.Qxe5#
      • 1...Sxc4
        • 2.Sc5#
        • 2.Sf6#
      • 1...Sd3
        • 2.Sc3#
      • 1...Sf3
        • 2.Sc3#
        • 2.Sc5#
        • 2.Sf6#
      • 1...Sg4
        • 2.Sxg5#
      • 1...Sg6
        • 2.Sc5#
        • 2.Sf6#
      • 1...Sd7
        • 2.Bf5#
      • 1...Sf7
        • 2.Sc5#
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(d);XP(G)::R1(B)
    • S(d);::R1(B)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);N_SPINS(a),P-FLIGHT::B(K),XS(d)
      • Refutation
        • R(b);XS(F)
  • Actual
    • Q(A);N_PINS(a)
    • Threat
      • QAR1(A),XS(d)
    • Vars
      • K(c);P-FLIGHT,P_SPINS(d)::QAB1(A),XS(d)
      • S(d);S_CUTR(b)::S(F)
      • S(d);S_CUTR(b)::S(J),XP(e)
      • S(d);S_CUTB(g)::B(E)
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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).