MESON Chess Problem Database

Problem Display
PID: 263843 (8/2RN4/2p2R1B/r2B3r/2bk1n2/Q1np4/3N1P1P/5K2 w - - 0 1)

van Grieken, JL

Tijdschrift vd NSB, 1935

8/2RN4/2p2R1B/r2B3r/2bk1n2/Q1np4/3N1P1P/5K2

#2

10 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Rd6#
      • 2.Qd6#
    • 1...Ra4
      • 2.Qc5#
    • 1...Rc5
      • 2.Qxc5#
    • 1...Ra6
      • 2.Qc5#
    • 1...Ra7
      • 2.Qc5#
    • 1...Ra8
      • 2.Qc5#
    • 1...Bb5
      • 2.Qc5#
  • Tries
    • 1.Qxc3+?
      • 1...Kxd5
        • 2.Qxc4#
      • 1...Kxc3!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Sf3#
      • 1...Raxd5
        • 2.Qc5#
      • 1...Rhxd5
        • 2.Bg7#
      • 1...Bxd5
        • 2.Qb4#
      • 1...Scxd5
        • 2.Qb2#
      • 1...Sfxd5
        • 2.Be3#
      • 1...cxd5
        • 2.Rxc4#
      • 1...Rh3
        • 2.Bg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 6
  • Sets
    • R(f);N_GUARD::QAB1(E)
    • R(f);N_GUARD::QAB1(E),XR(f)
    • B(c);S_CUTR(f)::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK,XS(a)
      • Vars
        • K(d);P-FLIGHT,XB(F)::QAB1(E),XB(c)
      • Refutation
        • K(d);S_FLIGHT,XQ(E)
  • Actual
    • R(G);
    • Threat
      • S(B)
    • Vars
      • R(f);N_GUARD,P_SPINR(f),XB(F)::QAB1(E)
      • R(g);N_GUARD,P_SPINR(g),XB(F)::B(H)
      • B(c);OGATEB,P_SPINB(c),XB(F)::QAR2(E)
      • S(a);OGATEB,P_SPINS(a),XB(F)::QAB(E)
      • S(e);OGATE,P_SPINS(e),XB(F)::B(H)
      • P(h);OGATE,P_SPINP(h),XB(F)::R1(I),XB(c)
      • R(g);N_GUARD::B(H)
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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).