MESON Chess Problem Database

Problem Display
PID: 144187 (1B4K1/5n2/1p2PPNp/1p1kn1bR/3p4/1N1P4/Q1R3r1/8 w - - 0 1)

Gugel, Lev Nikolaevich

Magyar Sakkvilag, 1930

1B4K1/5n2/1p2PPNp/1p1kn1bR/3p4/1N1P4/Q1R3r1/8

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Sa1#
      • 2.Sxc1#
      • 2.Sd2#
      • 2.Sa5#
    • 1...Bd2
      • 2.Sa1#
      • 2.Sc1#
      • 2.Sxd2#
      • 2.Sa5#
    • 1...Be3
      • 2.Sa1#
      • 2.Sc1#
      • 2.Sd2#
      • 2.Sa5#
    • 1...Bf4
      • 2.Sa1#
      • 2.Sc1#
      • 2.Sd2#
      • 2.Sa5#
    • 1...Bh4
      • 2.Sa1#
      • 2.Sc1#
      • 2.Sd2#
      • 2.Sa5#
    • 1...Bxf6
      • 2.Sa1#
      • 2.Sc1#
      • 2.Sd2#
      • 2.Sa5#
    • 1...Sxd3
      • 2.Sd2#
    • 1...Sf3
      • 2.Sa1#
      • 2.Sc1#
      • 2.Sd2#
      • 2.Sa5#
      • 2.Sf4#
    • 1...Sg4
      • 2.Sa1#
      • 2.Sc1#
      • 2.Sd2#
      • 2.Sa5#
      • 2.Sf4#
    • 1...Sc6
      • 2.Sa1#
      • 2.Sc1#
      • 2.Sd2#
      • 2.Sa5#
      • 2.Sc5#
      • 2.Sf4#
    • 1...Sxg6
      • 2.Sa1#
      • 2.Sc1#
      • 2.Sd2#
      • 2.Sa5#
    • 1...Sd7
      • 2.Sa1#
      • 2.Sc1#
      • 2.Sd2#
      • 2.Sa5#
      • 2.Sf4#
  • Tries
    • 1.Sc5+?
      • 1...Kc6
        • 2.Se7#
        • 2.Qa8#
      • 1...Sc4!
    • 1.Qa8+?
      • 1...Sc6
        • 2.Sf4#
        • 2.Qxc6#
      • 1...Kxe6!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Se7#
      • 1...Kxc6
        • 2.Qa8#
      • 1...Bxf6
        • 2.Qxg2#
      • 1...Sxd3
        • 2.Qxg2#
      • 1...Sxc6
        • 2.Sf4#
      • 1...Sxg6
        • 2.Qxg2#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Bc1
        • 2.Qxg2#
      • 1...Bd2
        • 2.Sa5#
      • 1...Be3
        • 2.Qxg2#
      • 1...Bf4
        • 2.Qxg2#
      • 1...Bh4
        • 2.Qxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD,P_SPINB(f),XP(D)::QAB(A)+S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • S(e);P_SPINB(f),P_SPINS(e)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(d);S_FLIGHT,XP(F)
  • Actual
    • R(B);
    • Threat
      • S(H)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(B)::QAB(A)
      • B(f);P_PINS(H),P_SPINS(e),XP(G)::QAB(A),XR(a)
      • S(e);N_GUARD,P_SPINB(f),XP(D)::QAB(A),XR(a)
      • S(e);P_SPINB(f),SBLOCK,XR(B)::S(H)
      • S(e);N_GUARD,P_SPINB(f),XS(H)::QAB(A),XR(a)
      • S(i);N_GUARD::R1(B),XS(i)
      • B(f);P_PINS(H),P_SPINS(e)::QAB(A),XR(a)
      • B(f);P_PINS(H),P_SPINS(e),S_CUTR(a)::QAB(A)+S(C)
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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).