MESON Chess Problem Database

Problem Display
PID: 73714 (2N1BB2/p3NKQp/rp2pp1r/2k5/R1p3p1/4R2b/q1p5/8 w - - 0 1)

Eerkes, Allard Pieter

Tijdschrift vd KNSB, 1938

2N1BB2/p3NKQp/rp2pp1r/2k5/R1p3p1/4R2b/q1p5/8

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Sc6+?
      • 1...Kb5
        • 2.Sb4#
        • 2.Sd4#
        • 2.Sa5#
        • 2.Se5#
        • 2.S6xa7#
        • 2.Sb8#
        • 2.Sd8#
        • 2.Rb4#
      • 1...Kd5!
    • 1.Rd3?
      • threat
        • 2.Sd5#
        • 2.Sf5#
        • 2.Sg6#
        • 2.Sg8#
      • 1...Rg6
        • 2.Sd5#
        • 2.Sf5#
        • 2.Sxg6#
        • 2.Sg8#
      • 1...b5
        • 2.Sc6#
      • 1...f5
        • 2.Sd5#
        • 2.Sxf5#
        • 2.Sg6#
        • 2.Sg8#
        • 2.Qd4#
        • 2.Qe5#
      • 1...cxd3!
    • 1.Re5+?
      • 1...fxe5
        • 2.Qxe5#
      • 1...Kd4!
  • Keys
    • 1.Kxe6!
      • threat
        • 2.Sf5#
      • 1...c3+
        • 2.Sd5#
      • 1...b5+
        • 2.Sc6#
      • 1...f5+
        • 2.Sg6#
      • 1...Kd4
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(j);OGATE::QAR2(E)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • R(A);
      • Threat
        • DUALS(4)
      • Vars
        • P(h);SBLOCK::B(H)+S(C)
      • Refutation
        • P(d);XR(A)
    • Try
      • R(A);CHECK
      • Vars
        • P(j);OGATE,XR(A)::QAR2(E),XP(j)
      • Refutation
        • K(f);P_SPINP(d),S_FLIGHT
  • Actual
    • K(D);S_FLIGHT,XP(i)
    • Threat
      • B(H)+S(C)
    • Vars
      • P(d);CHECK::B(H)+S(C)
      • P(h);CHECK,SBLOCK::B(H)+S(C)
      • P(j);CHECK::B(H)+S(C)
      • K(f);P_SPINP(d),S_FLIGHT::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).