MESON Chess Problem Database

Problem Display
PID: 6934 (B7/pR2N2q/r5n1/4n2r/3bk1p1/p3N2p/4KQ1B/8 w - - 0 1)

Gugel, Lev Nikolaevich

2nd Prize, 64 Shakhmatnoe obozrenie, 1935

B7/pR2N2q/r5n1/4n2r/3bk1p1/p3N2p/4KQ1B/8

#2

7 + 11

6479 Problemschach (Sidler) 1968
5862 An ABC of Chess Problems 1970
3098 FIDE Album (1914-1944) (I) 1971
4640 Chess Wizardry: The New ABC of Chess Problems 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Qf5#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rh6
      • 2.Qf5#
    • 1...Ba1
      • 2.Rb4#
    • 1...Bb2
      • 2.Rb4#
    • 1...Bc3
      • 2.Rb4#
    • 1...Bxe3
      • 2.Rb4#
      • 2.Qxe3#
    • 1...Bc5
      • 2.Rb4#
    • 1...Sf4+
      • 2.Qxf4#
    • 1...Sh4
      • 2.Qf4#
    • 1...Sxe7
      • 2.Qf4#
    • 1...Sf8
      • 2.Qf4#
    • 1...Sh8
      • 2.Qf4#
  • Keys
    • 1.S7f5!
      • threat
        • 2.Sg3#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Bxe3
        • 2.Rb4#
      • 1...Ba1
        • 2.Rb4#
      • 1...Bb2
        • 2.Rb4#
      • 1...Bc3
        • 2.Rb4#
      • 1...Bc5
        • 2.Rb4#
      • 1...Bb6
        • 2.Re7#
      • 1...Sd3
        • 2.Re7#
      • 1...Sf3
        • 2.Re7#
      • 1...Sc4
        • 2.Re7#
      • 1...Sc6
        • 2.Sd6#
      • 1...Sd7
        • 2.Rb6#
      • 1...Sf7
        • 2.Rb6#
        • 2.Re7#
      • 1...g3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 6
  • Sets
    • R(g);N_GUARD::QAB1(B)
    • R(g);N_GUARD::QAB1(B),XR(g)
    • B(c);::B(G)+R(E),DCHECK
    • S(i);CHECK,N_GUARD::QAR1(B),XS(i)
    • S(i);N_GUARD::QAR1(B)
    • S(i);N_GUARD,XS(F)::QAR1(B)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • S(i);CHECK,N_GUARD::QAR1(B),XS(i)
      • R(g);OGATE,XS(F)::QAB1(B),XR(g)
      • B(c);XS(D)::B(G)+R(E),DCHECK
      • B(c);::B(G)+R(E),DCHECK
      • B(c);S_CUTR(h)::B(G)+R(E)
      • S(f);::B(G)+R(E),DCHECK
      • S(f);S_CUTR(h)::S(F)
      • S(f);N_GUARD,S_CUTQ(k)::B(G)+R(E)
      • P(e);::S(F),XP(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).