MESON Chess Problem Database

Problem Display
PID: 146311 (8/B2K4/8/Rn1N1n2/Npk5/2pr4/P3Q3/8 w - - 0 1)

Easter, Norris

Bristol Times and Mirror, 1928

(First published on Thu Jun 21 1928)

8/B2K4/8/Rn1N1n2/Npk5/2pr4/P3Q3/8

#2

7 + 6

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qe6#
    • 1...Sbd4
      • 2.Sab6#
      • 2.Sdb6#
      • 2.Rc5#
    • 1...Sfd4
      • 2.Se3#
      • 2.Sdb6#
    • 1...Sd6
      • 2.Se3#
  • Tries
    • 1.Sb2+?
      • 1...Kxd5
        • 2.Rxb5#
        • 2.Qe6#
      • 1...cxb2!
    • 1.Bg1?
      • threat
        • 2.Sb6#
      • 1...Kxd5
        • 2.Sb6#
        • 2.Qe6#
      • 1...Sfd4
        • 2.Se3#
        • 2.Sdb6#
      • 1...Se3!
    • 1.Bf2?
      • threat
        • 2.Sb6#
      • 1...Kxd5
        • 2.Sb6#
        • 2.Qe6#
      • 1...Sfd4
        • 2.Se3#
        • 2.Sdb6#
      • 1...Se3!
    • 1.Qg4+?
      • 1...Kxd5
        • 2.Rxb5#
      • 1...Sbd4
        • 2.Sab6#
        • 2.Sdb6#
        • 2.Rc5#
      • 1...Sfd4
        • 2.Sdb6#
      • 1...Rd4!
    • 1.Qe4+?
      • 1...Sbd4
        • 2.Sab6#
        • 2.Sdb6#
        • 2.Rc5#
      • 1...Sfd4
        • 2.Sdb6#
      • 1...Rd4!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qxd3#
      • 1...Kd4
        • 2.Qe4#
      • 1...Kxd5
        • 2.Qe4#
      • 1...Sbd4
        • 2.Sb6#
      • 1...Sfd4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINR(b),OGATEB,P_SPINS(e),S_FLIGHT,XS(E)::QAB1(B)
    • S(f);N_PINS(E)::S(E)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • P(a);XS(C)
    • Try
      • B(F);
      • Threat
        • S(C)
      • Refutation
        • S(f);
    • Try
      • B(F);
      • Threat
        • S(C)
      • Refutation
        • S(f);
    • Try
      • Q(B);CHECK,N_PINR(b)
      • Vars
        • K(d);P_SPINS(e),S_FLIGHT,XS(E)::R(D),XS(e)
        • S(f);N_PINS(E),P_SPINS(f)::S(E)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • Q(B);CHECK,N_PINR(b)
      • Vars
        • S(f);N_PINS(E),P_SPINS(f)::S(E)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • S(C);
    • Threat
      • QAB1(B),XR(b)
    • Vars
      • K(d);N_PINS(E),N_SPINR(b),P-FLIGHT::QAR1(B)
      • K(d);N_SPINR(b),S_FLIGHT,XS(E)::QAB1(B)
      • S(e);N_PINS(E),SBLOCK::S(E)
      • S(f);N_PINS(E),SBLOCK::S(E)
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