MESON Chess Problem Database

Problem Display
PID: 237001 (2r3nn/5pp1/Q1p2k2/2K3R1/3N2B1/8/4RN2/2B2bq1 w - - 0 1)

Goldschmeding, Cornelis

Schakend Nederland, 1973

2r3nn/5pp1/Q1p2k2/2K3R1/3N2B1/8/4RN2/2B2bq1

#2

8 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg4
      • 2.Sxg4#
    • 1...Ra8
      • 2.Qxc6#
    • 1...Rb8
      • 2.Qxc6#
    • 1...Rf8
      • 2.Qxc6#
    • 1...Se7
      • 2.Se4#
    • 1...Sg6
      • 2.Rf5#
  • Keys
    • 1.Sxc6!
      • threat
        • 2.Qa1#
      • 1...Qxf2+
        • 2.Rxf2#
      • 1...Rxc6+
        • 2.Qxc6#
      • 1...Qxg4
        • 2.Sxg4#
      • 1...Qh2
        • 2.Se4#
      • 1...Qg3
        • 2.Se4#
      • 1...Ra8
        • 2.Sa7#
      • 1...Rb8
        • 2.Sxb8#
      • 1...Rd8
        • 2.Sxd8#
      • 1...Re8
        • 2.Se7#
      • 1...Sg6
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • Q(b);XB(E)::S(C),XQ(b)
    • R(g);N_GUARD::QAR(H),XP(c)
    • S(h);SBLOCK::S(C)
    • S(i);SBLOCK::R1(G)
  • Actual
    • S(D);P_SPINS(C),XP(c)
    • Threat
      • QAB(H)
    • Vars
      • Q(b);CHECK,OGATE,P_PINS(D),XS(C)::R(B),XQ(b)
      • R(g);CHECK,OGATE,P_SPINR(g),XS(D)::QAR(H),XR(g)
      • Q(b);N_PINS(C),P_PINS(D),XB(E)::S(C),XQ(b)
      • Q(b);N_PINS(C),P_PINS(D)::S(C)
      • R(g);::QAR(H)+S(D)
      • R(g);::QAR(H)+S(D),XR(g)
      • S(i);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).