MESON Chess Problem Database

Problem Display
PID: 156176 (8/4p1n1/R7/1Nn1k1Pp/7N/5P2/1b1Q4/1b5K w - - 0 1)

Metz, J

HM., Sports Referee, 1932

8/4p1n1/R7/1Nn1k1Pp/7N/5P2/1b1Q4/1b5K

#2

7 + 7

1577 Jaarboek 1932

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qd4#
    • 1...Ba3
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Se4
      • 2.f4#
    • 1...Sf5
      • 2.Sg6#
    • 1...e6
      • 2.Qd6#
  • Tries
    • 1.Sg6+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Bxg6!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Sc7#
      • 1...Kxf4!
    • 1.Qxb2+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf4!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Qh2#
      • 1...exd6
        • 2.Qxd6#
      • 1...Bc1
        • 2.Qd4#
      • 1...Sd3
        • 2.Qe3#
      • 1...Se4
        • 2.f4#
      • 1...Sce6
        • 2.Rd5#
      • 1...Sf5
        • 2.Sg6#
      • 1...Sge6
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(b);N_GUARD::QAB1(B)
    • B(b);N_GUARD::QAB1(B),XB(b)
    • S(c);SBLOCK::P(C)
    • S(g);SBLOCK,S_CUTB(a)::S(D)
    • P(f);N_GUARD::QAB1(B)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(B)
      • Refutation
        • B(a);XS(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);P-FLIGHT::S(E)
      • Refutation
        • K(d);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK,XB(b)
      • Vars
        • K(d);P-FLIGHT::QAR1(B)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(G);
    • Threat
      • QAB(B)
    • Vars
      • P(f);OGATE,XR(G)::QAB1(B),XP(f)
      • B(b);N_GUARD::QAB1(B)
      • S(c);N_GUARD,S_CUTB(a)::QAR2(B)
      • S(c);SBLOCK::P(C)
      • S(c);SBLOCK::R1(G)
      • S(g);SBLOCK,S_CUTB(a)::S(D)
      • S(g);SBLOCK::R1(G)
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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).