MESON Chess Problem Database

Problem Display
PID: 198338 (3N4/8/1p6/1p1kBp2/1Pb2Kp1/1r1N3p/B1Q5/8 w - - 0 1)

Niemeijer, Meindert

De Wereldkroniek, 1920

3N4/8/1p6/1p1kBp2/1Pb2Kp1/1r1N3p/B1Q5/8

#2

7 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd3
      • 2.Qxd3#
    • 1...Bxd3
      • 2.Qxd3#
      • 2.Qc6#
    • 1...h2
      • 2.Qg2#
  • Tries
    • 1.Kxf5?
      • threat
        • 2.Sf4#
      • 1...Bxd3+
        • 2.Qxd3#
      • 1...Rxd3
        • 2.Qxd3#
      • 1...Rxb4!
    • 1.Bxb3?
      • 1...Bxb3
        • 2.Qxb3#
        • 2.Qc6#
      • 1...h2
        • 2.Qg2#
      • 1...g3!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qh1#
      • 1...Rxd3
        • 2.Qxd3#
      • 1...Bxd3
        • 2.Bxb3#
        • 2.Qxd3#
      • 1...Rb1
        • 2.Sc1#
      • 1...Rb2
        • 2.Sxb2#
      • 1...g3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(a);OGATE,P_SPINB(c),XS(C)::QAR2(B),XR(a)
    • P(b);N_GUARD::QAB(B)
  • Tries
    • Try
      • K(E);P-FLIGHT,XP(g)
      • Threat
        • S(C)
      • Vars
        • B(c);CHECK,OGATE,P_SPINR(a),XS(C)::QAR2(B),XB(c)
        • R(a);OGATE,P_SPINB(c),XS(C)::QAR2(B),XR(a)
      • Refutation
        • R(a);P_SPINB(c),XP(D)
    • Try
      • B(A);P_PINB(c),XR(a)
      • Vars
        • P(b);N_GUARD::QAB(B)
      • Refutation
        • P(d);
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • R(a);OGATE,P_SPINB(c),P_SPINR(a),XS(C)::QAR2(B),XR(a)
      • R(a);N_GUARD,P_SPINB(c)::QAR(B)+S(C)
      • R(a);N_GUARD,P_SPINB(c)::QAR(B)+S(C),XR(a)
      • P(d);N_GUARD::QAB(B)
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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).