MESON Chess Problem Database

Problem Display
PID: 50048 (1n1RR3/1r6/q5pB/p1p5/2B1N1p1/1pP2nQ1/1K1PN3/3k4 w - - 0 1)

Degener, Udo

3rd Comm., Schweizer Schach-Magazin, 1986

1n1RR3/1r6/q5pB/p1p5/2B1N1p1/1pP2nQ1/1K1PN3/3k4

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Sf2#
    • 1...Sg1
      • 2.Qxg1#
    • 1...Sxd2
      • 2.Rxd2#
      • 2.Qg1#
    • 1...Sd4
      • 2.Qg1#
    • 1...Sh4
      • 2.Qg1#
    • 1...Se5
      • 2.Qg1#
    • 1...Sg5
      • 2.Qg1#
  • Tries
    • 1.Sg1?
      • threat
        • 2.Sf2#
      • 1...Qe6
        • 2.Be2#
      • 1...Re7
        • 2.Bxb3#
      • 1...Se5!
    • 1.Sd4?
      • threat
        • 2.Sf2#
      • 1...Qe6
        • 2.Be2#
      • 1...Re7
        • 2.Bxb3#
      • 1...Se5
        • 2.Qg1#
      • 1...Sg5
        • 2.Qg1#
      • 1...g5!
    • 1.Sf4?
      • threat
        • 2.Sf2#
      • 1...Qd6
        • 2.Be2#
      • 1...Qe6
        • 2.Be2#
      • 1...Rd7
        • 2.Bxb3#
      • 1...Re7
        • 2.Bxb3#
      • 1...Sd4
        • 2.Qg1#
      • 1...Se5
        • 2.Qg1#
      • 1...Sd7!
    • 1.Bxb3+?
      • 1...Kxe2
        • 2.Qf2#
      • 1...Rxb3+!
    • 1.Qe1+?
      • 1...Sxe1
        • 2.Sf2#
      • 1...Kxe1!
    • 1.Qg1+?
      • 1...Se1
        • 2.Sf2#
      • 1...Sxg1!
  • Keys
    • 1.Sc1!
      • threat
        • 2.Sf2#
      • 1...Qe6
        • 2.Be2#
      • 1...Re7
        • 2.Bxb3#
      • 1...Se5
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(c);SBLOCK::S(G)
    • S(c);N_GUARD::QAR(E),XS(c)
    • S(c);N_GUARD::QAR(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(G)
      • Vars
        • Q(g);N_GUARD::B(F)
        • R(i);N_GUARD::B(F),XP(b)
      • Refutation
        • S(c);
    • Try
      • S(C);
      • Threat
        • S(G)
      • Vars
        • Q(g);N_GUARD::B(F)
        • R(i);N_GUARD::B(F),XP(b)
        • S(c);N_GUARD::QAR(E)
      • Refutation
        • P(h);
    • Try
      • S(C);
      • Threat
        • S(G)
      • Vars
        • Q(g);N_GUARD::B(F)
        • R(i);N_GUARD::B(F),XP(b)
        • S(c);N_GUARD::QAR(E)
      • Refutation
        • S(j);
    • Try
      • B(F);CHECK,P_SPINB(F),XP(b)
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(E)
      • Refutation
        • R(i);CHECK,XB(F)
    • Try
      • Q(E);CHECK
      • Vars
        • S(c);SBLOCK,XQ(E)::S(G)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • S(c);P_SPINS(c)::S(G)
      • Refutation
        • S(c);XQ(E)
  • Actual
    • S(C);
    • Threat
      • S(G)
    • Vars
      • Q(g);N_GUARD::B(F)
      • R(i);N_GUARD::B(F),XP(b)
      • S(c);N_GUARD::QAR(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).