MESON Chess Problem Database

Problem Display
PID: 160915 (8/7p/6pN/3R3B/1p3kb1/6Nn/n2KPr1B/5Q2 w - - 0 1)

Leiss, Hans-Dieter

Stern, 1970

8/7p/6pN/3R3B/1p3kb1/6Nn/n2KPr1B/5Q2

#2

8 + 8

6490 yacpdb 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.e3#
  • Tries
    • 1.Sgf5+?
      • 1...Ke4
        • 2.Rd4#
        • 2.Re5#
      • 1...Kg5!
    • 1.Bxg6?
      • threat
        • 2.Sh1#
        • 2.Se4#
        • 2.Sh5#
      • 1...Bxe2
        • 2.Rf5#
      • 1...Bf5
        • 2.Rxf5#
      • 1...Bf3
        • 2.Sh5#
        • 2.Rf5#
      • 1...Bh5
        • 2.Sh1#
        • 2.Se4#
        • 2.Sxh5#
        • 2.Rf5#
      • 1...hxg6!
    • 1.Qxf2+?
      • 1...Bf3
        • 2.Qe3#
        • 2.Qxf3#
        • 2.e3#
      • 1...Sxf2!
  • Keys
    • 1.Kd3!
      • threat
        • 2.Sh1#
        • 2.Se4#
      • 1...Rf3+
        • 2.e3#
      • 1...Bxe2+
        • 2.Sxe2#
      • 1...Bf5+
        • 2.Se4#
      • 1...Sc1+
        • 2.Qxc1#
      • 1...Bf3
        • 2.e3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);N_PINP(C)::P(C)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(e);N_SPINR(b),S_FLIGHT
    • Try
      • B(G);XP(g)
      • Threat
        • DUALS(3)
      • Vars
        • B(f);N_GUARD,XP(C)::R1(F)
        • B(f);N_GUARD::R1(F),XB(f)
      • Refutation
        • P(h);XB(G)
    • Try
      • Q(A);CHECK,N_SPINP(C),XR(b)
      • Refutation
        • S(c);XQ(A)
  • Actual
    • K(B);N_SPINP(C),P-FLIGHT
    • Threat
      • DUALS(2)
    • Vars
      • R(b);CHECK::P(C)
      • B(f);CHECK,XP(C)::B(D)+S(E),DCHECK,XB(f)
      • B(f);CHECK::B(D)+S(E)
      • S(a);CHECK,N_GUARD::QAB(A),XS(a)
      • B(f);N_SPINR(b)::P(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).