MESON Chess Problem Database

Problem Display
PID: 176120 (5N2/5rQ1/2br1P2/3P1R2/2BkP3/1P1N4/n2B2pK/4R3 w - - 0 1)

Weigel, Richard

Schach-Echo, 1939

5N2/5rQ1/2br1P2/3P1R2/2BkP3/1P1N4/n2B2pK/4R3

#2

12 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Se6#
    • 1...Re6
      • 2.Sxe6#
    • 1...Rdxf6
      • 2.Se6#
    • 1...Rdd7
      • 2.Se6#
    • 1...Rd8
      • 2.Se6#
    • 1...Rfxf6
      • 2.Qa7#
    • 1...Ra7
      • 2.Qxa7#
    • 1...Rxf8
      • 2.Qa7#
    • 1...g1Q+
      • 2.Qxg1#
    • 1...g1S
      • 2.Qxg1#
    • 1...g1B+
      • 2.Qxg1#
    • 1...g1R
      • 2.Qxg1#
  • Tries
    • 1.Be3+?
      • 1...Kxe4
        • 2.Rf4#
        • 2.Qg4#
      • 1...Kc3!
    • 1.Qxg2?
      • threat
        • 2.Qg1#
        • 2.Qf2#
      • 1...Rg7
        • 2.Qf2#
      • 1...Rh7+!
    • 1.Qg3?
      • threat
        • 2.Qf2#
        • 2.Qe5#
        • 2.Qe3#
      • 1...g1Q+
        • 2.Qxg1#
      • 1...g1B+
        • 2.Qxg1#
      • 1...Rxd5
        • 2.Se6#
        • 2.Qf2#
        • 2.Qe3#
      • 1...Re6
        • 2.Sxe6#
        • 2.Qf2#
        • 2.Qe3#
      • 1...Re7
        • 2.Qf2#
        • 2.Qe3#
      • 1...Rh7+!
    • 1.Qg5?
      • threat
        • 2.Qe3#
      • 1...g1Q+
        • 2.Qxg1#
      • 1...g1B+
        • 2.Qxg1#
      • 1...Rh7+!
  • Keys
    • 1.Rf4!
      • threat
        • 2.e5#
      • 1...g1Q+
        • 2.Qxg1#
      • 1...g1B+
        • 2.Qxg1#
      • 1...Rdxf6
        • 2.Se6#
      • 1...Rfxf6
        • 2.Qa7#
      • 1...Bxd5
        • 2.exd5#
      • 1...Sc3
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(e);N_GUARD,XP(H)::S(L)
    • R(e);N_GUARD::S(L),XR(e)
    • R(e);N_GUARD,P_SPINR(e),XP(J)::S(L)
    • R(e);N_GUARD::S(L)
    • R(f);OGATE,P_SPINR(f),XP(J)::QAB(K)
    • R(f);OGATE::QAB(K),XR(f)
    • R(f);OGATE,XS(L)::QAB(K)
    • P(b);CHECK,OGATE::QAB(K),XQ(b)
    • P(b);OGATE::QAB(K),XS(b)
    • P(b);CHECK,OGATE::QAB(K),XB(b)
    • P(b);OGATE::QAB(K),XR(b)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(K);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);::QAB(K)
      • Refutation
        • R(f);CHECK
    • Try
      • Q(K);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);CHECK,OGATE::QAB(K),XQ(b)
        • P(b);CHECK,OGATE::QAB(K),XB(b)
      • Refutation
        • R(f);CHECK
    • Try
      • Q(K);
      • Threat
        • QAB1(K)
      • Vars
        • P(b);CHECK,OGATE::QAB(K),XQ(b)
        • P(b);CHECK,OGATE::QAB(K),XB(b)
      • Refutation
        • R(f);CHECK
  • Actual
    • R(I);
    • Threat
      • R(I)+P(G)
    • Vars
      • P(b);CHECK,OGATE::QAB(K),XQ(b)
      • P(b);CHECK,OGATE::QAB(K),XB(b)
      • R(e);N_GUARD,P_SPINR(e),XP(J)::S(L)
      • R(f);OGATE,P_SPINR(f),XP(J)::QAB(K)
      • B(d);OGATE,XP(H)::R(I)+P(G),XB(d)
      • S(a);SBLOCK::B(B)
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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).