MESON Chess Problem Database

Problem Display
PID: 6778 (8/8/8/8/2NRQBB1/1q5b/4PPp1/4k1K1 w - - 0 1)

Blaine, Harry (Harley, Brian)

Morning Post, 1933

(First published on Sat Oct 14 1933)

8/8/8/8/2NRQBB1/1q5b/4PPp1/4k1K1

#2

8 + 4

15085 Australian Chess Forum 1996
3310 2345 Chess Problems 1997
56 The Problemist 2008
15290 Harley Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qxb1#
    • 1...Qd3
      • 2.exd3#
    • 1...Qf3
      • 2.exf3#
    • 1...Qg3
      • 2.Qb1#
  • Tries
    • 1.Qb1+?
      • 1...Qd1
        • 2.Bd2#
        • 2.Rxd1#
        • 2.Qxd1#
      • 1...Qxb1!
  • Keys
    • 1.Bg3!
      • threat
        • 2.f3#
      • 1...Qxg3
        • 2.Qb1#
      • 1...Qd3
        • 2.exd3#
      • 1...Qe3
        • 2.fxe3#
      • 1...Qf3
        • 2.exf3#
      • 1...Qb8
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD::QAR(F),XQ(c)
    • Q(c);OGATE::QAR(F)+P(B),XQ(c)
    • Q(c);N_GUARD::QAR(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • Q(c);XQ(F)
  • Actual
    • B(G);
    • Threat
      • B(G)+P(C)
    • Vars
      • Q(c);N_GUARD,XB(G)::QAR(F)
      • Q(c);OGATE::QAR(F)+P(B),XQ(c)
      • Q(c);OGATE,P_PINP(C)::B(G)+P(C),XQ(c)
      • Q(c);N_GUARD::B(G)+P(C)
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