MESON Chess Problem Database

Problem Display
PID: 251272 (8/1P6/K1p5/pNr5/pk1B4/4p3/3nQ3/R1N5 w - - 0 1)

van Dijk, Nils Gustav Gerard

3rd Comm., Jerusalem Post, 1957

8/1P6/K1p5/pNr5/pk1B4/4p3/3nQ3/R1N5

#2

7 + 7

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Rxb1#
    • 1...Sf1
      • 2.Rb1#
    • 1...Sb3
      • 2.Sa2#
    • 1...Sf3
      • 2.Rb1#
    • 1...Sc4
      • 2.Bc3#
    • 1...Se4
      • 2.Rb1#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Rxa4#
      • 1...Rxc3
        • 2.b8Q#
        • 2.b8R#
      • 1...a3!
    • 1.Rb1+?
      • 1...Sb3
        • 2.Sa2#
      • 1...Sxb1!
  • Keys
    • 1.Sa3!
      • 1...Rxc1
        • 2.b8Q#
        • 2.b8R#
      • 1...Rc2
        • 2.Sxc2#
        • 2.b8Q#
        • 2.b8R#
      • 1...Rc3
        • 2.b8Q#
        • 2.b8R#
      • 1...Rc4
        • 2.b8Q#
        • 2.b8R#
      • 1...Rb5
        • 2.Sc2#
      • 1...Rd5
        • 2.Sc2#
      • 1...Re5
        • 2.Sc2#
      • 1...Rf5
        • 2.Sc2#
      • 1...Rg5
        • 2.Sc2#
      • 1...Rh5
        • 2.Sc2#
      • 1...Sb1
        • 2.Qb2#
      • 1...Sf1
        • 2.Qb2#
      • 1...Sb3
        • 2.Sd3#
      • 1...Sf3
        • 2.Qb2#
      • 1...Sc4
        • 2.Sc2#
      • 1...Se4
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 6
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::R(A),XS(a)
    • S(a);N_GUARD::R(A)
    • S(a);SBLOCK::S(B)
    • S(a);S_CUTR(f)::B(D)
  • Tries
    • Try
      • S(E);
      • Threat
        • R1(A),XP(c)
      • Vars
        • R(f);N_GUARD,XS(E)::P=Q
      • Refutation
        • P(c);
    • Try
      • R(A);CHECK
      • Vars
        • S(a);P_SPINS(a)::S(B)
      • Refutation
        • S(a);XR(A)
  • Actual
    • S(E);
    • Vars
      • R(f);N_GUARD,XS(B)::P=Q
      • R(f);N_GUARD::P=Q
      • R(f);N_GUARD::S(E)
      • S(a);OGATE::QAR2(C)
      • S(a);SBLOCK::S(B)
      • S(a);S_CUTR(f)::S(E)
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