MESON Chess Problem Database

Problem Display
PID: 153087 (8/8/8/Q3n3/8/2NB4/R1p5/2k1nK2 w - - 0 1)

Blaine, Harry (Harley, Brian)

Morning Post, 1936

(First published on Sat Dec 12 1936)

8/8/8/Q3n3/8/2NB4/R1p5/2k1nK2

#2

5 + 4

15290 Harley Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sg2
      • 2.Rxc2#
    • 1...S1f3
      • 2.Rxc2#
    • 1...Sc6
      • 2.Qg5#
    • 1...Sd7
      • 2.Qg5#
  • Tries
    • 1.Se2+?
      • 1...Kd1
        • 2.Qxe1#
      • 1...Kb1!
    • 1.Sa4?
      • threat
        • 2.Ra1#
        • 2.Qxe1#
      • 1...Kd1
        • 2.Qxe1#
      • 1...S1xd3
        • 2.Ra1#
      • 1...S5xd3
        • 2.Ra1#
      • 1...Sg2
        • 2.Ra1#
      • 1...S1f3
        • 2.Ra1#
      • 1...S5f3
        • 2.Ra1#
      • 1...Kb1!
    • 1.Ra1+?
      • 1...Kb2
        • 2.Qa3#
      • 1...Kd2!
    • 1.Qxe5?
      • threat
        • 2.Qf4#
        • 2.Qxe1#
        • 2.Qe3#
        • 2.Qg5#
      • 1...Sxd3
        • 2.Qe3#
      • 1...Sg2
        • 2.Rxc2#
      • 1...Sf3
        • 2.Rxc2#
      • 1...Kd2!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Ra1#
      • 1...Kb1
        • 2.Ra1#
      • 1...Kxd1
        • 2.Qxe1#
      • 1...cxd1Q
        • 2.Qa3#
      • 1...cxd1S
        • 2.Qd2#
      • 1...cxd1B
        • 2.Qd2#
        • 2.Qa3#
      • 1...cxd1R
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::R1(B),XP(c)
    • S(d);OGATE::QAB(E)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(E),XS(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(E),XS(b)
        • S(b);XB(D)::R(B)
        • S(d);XB(D)::R(B)
        • S(b);::R(B)
        • S(d);::R(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);XS(d)
      • Threat
        • DUALS(4)
      • Vars
        • S(b);XB(D)::QAB(E)
        • S(b);N_GUARD::R1(B),XP(c)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • R(B)
    • Vars
      • K(a);P-FLIGHT,P_SPINP(c)::R1(B)
      • K(a);OGATEB,P-FLIGHT,XS(C)::QAR1(E),XS(b)
      • P(c);SBLOCK,XS(C)::QAB(E)
      • P(c);XS(C)::QAB1(E)
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