MESON Chess Problem Database

Problem Display
PID: 233320 (8/3Q4/8/8/2N5/2Bp4/p3N1p1/rb1k2K1 w - - 0 1)

Neyndorff, Luke

Chess Life, 1984

8/3Q4/8/8/2N5/2Bp4/p3N1p1/rb1k2K1

#2

5 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc2
      • 2.Qa4#
    • 1...Kxe2
      • 2.Qg4#
    • 1...d2
      • 2.Qxd2#
  • Tries
    • 1.Kxg2?
      • 1...Kc2
        • 2.Qa4#
      • 1...Kxe2
        • 2.Qg4#
      • 1...d2
        • 2.Qxd2#
      • 1...Bc2!
    • 1.Sb2+?
      • 1...Kc2
        • 2.Qa4#
      • 1...Kxe2!
    • 1.Bb4?
      • 1...Kc2
        • 2.Qa4#
      • 1...Kxe2
        • 2.Qg4#
      • 1...d2
        • 2.Qxd2#
      • 1...Bc2!
    • 1.Ba5?
      • 1...Kc2
        • 2.Qa4#
      • 1...Kxe2
        • 2.Qg4#
      • 1...d2
        • 2.Qxd2#
      • 1...Bc2!
    • 1.Qd5?
      • 1...Kc2
        • 2.Se3#
      • 1...Kxe2
        • 2.Qh5#
      • 1...d2
        • 2.Qxd2#
      • 1...Bc2!
  • Keys
    • 1.Bd2!
      • 1...Kc2
        • 2.Qa4#
      • 1...Kxe2
        • 2.Qg4#
      • 1...dxe2
        • 2.Se3#
      • 1...Bc2
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINP(f),S_FLIGHT::QAB(E)
    • K(c);N_SPINP(f),OGATEB,S_FLIGHT,XS(B)::QAB(E)
    • P(f);OGATE::QAR1(E),XP(f)
  • Tries
    • Try
      • K(A);P-FLIGHT,XP(e)
      • Vars
        • K(c);N_SPINP(f),S_FLIGHT::QAB(E)
        • K(c);N_SPINP(f),OGATEB,S_FLIGHT,XS(B)::QAB(E)
        • P(f);OGATE::QAR1(E),XP(f)
      • Refutation
        • B(b);
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_SPINP(f),S_FLIGHT::QAB(E)
      • Refutation
        • K(c);N_SPINP(f),S_FLIGHT,XS(B)
    • Try
      • B(C);
      • Vars
        • K(c);N_SPINP(f),S_FLIGHT::QAB(E)
        • K(c);N_SPINP(f),OGATEB,S_FLIGHT,XS(B)::QAB(E)
        • P(f);OGATE::QAR1(E),XP(f)
      • Refutation
        • B(b);
    • Try
      • B(C);
      • Vars
        • K(c);N_SPINP(f),S_FLIGHT::QAB(E)
        • K(c);N_SPINP(f),OGATEB,S_FLIGHT,XS(B)::QAB(E)
        • P(f);OGATE::QAR1(E),XP(f)
      • Refutation
        • B(b);
    • Try
      • Q(E);
      • Vars
        • K(c);N_SPINP(f),S_FLIGHT::S(D)
        • K(c);N_SPINP(f),OGATEB,S_FLIGHT,XS(B)::QAB(E)
        • P(f);OGATE::QAR1(E),XP(f)
      • Refutation
        • B(b);
  • Actual
    • B(C);N_PINP(f)
    • Vars
      • K(c);S_FLIGHT::QAB(E)
      • K(c);OGATEB,S_FLIGHT,XS(B)::QAB(E)
      • P(f);SBLOCK,XS(B)::S(D)
      • B(b);SBLOCK::S(B)
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