MESON Chess Problem Database

Problem Display
PID: 23454 (8/8/8/8/8/8/kPP5/1nQ1K2R w - - 0 1)

van Dijk, Nils Gustav Gerard

Ostledingen, 1959

8/8/8/8/8/8/kPP5/1nQ1K2R

#2

5 + 2

4884 154 norske miniatyrproblemer 1974
2012 Miniature Chess Problems from Many Countries 1981
3295 Einfuhrung in die Welt des Schachproblem 1984

SOLUTION

  • SOUND
  • Tries
    • 1.Ke2?
      • threat
        • 2.Qxb1#
      • 1...Ka1
        • 2.Qxb1#
      • 1...Sd2
        • 2.Qa1#
      • 1...Sa3
        • 2.Qa1#
      • 1...Sc3+!
    • 1.Rh3?
      • 1...Ka1
        • 2.Ra3#
      • 1...Sd2
        • 2.Ra3#
      • 1...Sa3
        • 2.Rxa3#
      • 1...Sc3!
  • Keys
    • 1.Kf2!
      • threat
        • 2.Qxb1#
      • 1...Ka1
        • 2.Qxb1#
      • 1...Sd2
        • 2.Qa1#
      • 1...Sa3
        • 2.Qa1#
      • 1...Sc3
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAB1(A),XS(a)
      • Vars
        • K(b);P-FLIGHT,P_SPINS(a)::QAR1(A),XS(a)
        • S(a);OGATE::QAR1(A)
      • Refutation
        • S(a);CHECK
    • Try
      • R(C);
      • Vars
        • K(b);P-FLIGHT,P_SPINS(a)::R(C)
        • S(a);N_GUARD::R1(C)
        • S(a);N_GUARD::R1(C),XS(a)
      • Refutation
        • S(a);
  • Actual
    • K(B);S_FLIGHT
    • Threat
      • QAB1(A),XS(a)
    • Vars
      • K(b);P-FLIGHT,P_SPINS(a)::QAR1(A),XS(a)
      • S(a);OGATE::QAR1(A)
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