MESON Chess Problem Database

Problem Display
PID: 244463 (BBr3b1/8/1Q1P1N1K/1pnrkPPp/8/1pPp4/1N2q3/4RR2 w - - 0 1)

Eerkes, Allard Pieter

Tijdschrift vd KNSB, 1942

BBr3b1/8/1Q1P1N1K/1pnrkPPp/8/1pPp4/1N2q3/4RR2

#2

12 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6
      • 2.Bxd6#
      • 2.Qxd6#
    • 1...Se4
      • 2.Sd7#
    • 1...b4
      • 2.Sc4#
  • Tries
    • 1.Sxd3+?
      • 1...Sxd3
        • 2.Rxe2#
      • 1...Rxd3!
    • 1.Rxe2+?
      • 1...Se4
        • 2.Sd7#
        • 2.Rxe4#
      • 1...dxe2!
    • 1.Qxc5?
      • threat
        • 2.Sxd3#
      • 1...d2
        • 2.Sd3#
        • 2.Rxe2#
      • 1...Rcxc5!
  • Keys
    • 1.Qxb5!
      • threat
        • 2.Sc4#
      • 1...Rxd6
        • 2.Sxd3#
      • 1...Rd4
        • 2.Sd7#
      • 1...Sa4
        • 2.Sxd3#
      • 1...Se4
        • 2.Sd7#
      • 1...Sa6
        • 2.Sxd3#
      • 1...Se6
        • 2.Sxd3#
        • 2.Qxd5#
      • 1...Sb7
        • 2.Sxd3#
      • 1...Sd7
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(e);N_GUARD,N_SPINQ(a),SBLOCK::S(I)
    • P(d);N_GUARD::S(C)
  • Tries
    • Try
      • S(C);CHECK,XP(c)
      • Vars
        • S(e);XS(C)::R(A),XQ(a)
      • Refutation
        • R(f);XS(C)
    • Try
      • R(A);CHECK,XQ(a)
      • Refutation
        • P(c);XR(A)
    • Try
      • Q(G);P_PINR(f),XS(e)
      • Threat
        • S(C),XP(c)
      • Refutation
        • R(i);N_SPINR(f),XQ(G)
  • Actual
    • Q(G);XP(d)
    • Threat
      • S(C)
    • Vars
      • R(f);N_GUARD,P_PINS(I),P_SPINR(f),P_SPINS(e),XP(H)::S(C),XP(c)
      • R(f);P_SPINS(e)::S(I)
      • S(e);N_GUARD,P_SPINR(f)::S(C),XP(c)
      • S(e);N_GUARD,N_SPINQ(a),P_SPINR(f),SBLOCK::S(I)
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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).