MESON Chess Problem Database

Problem Display
PID: 6811 (5b2/2Q5/3q1B2/1p6/5k2/p7/5PnN/KB4n1 w - - 0 1)

Meurs, Abraham

Brisbane Sports and Radio, 1933

5b2/2Q5/3q1B2/1p6/5k2/p7/5PnN/KB4n1

#2

6 + 7

3979 Systematic Terminology 1984
136 Problem Observer 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5+
      • 2.Qxe5#
    • 1...Bh6
      • 2.Qxd6#
    • 1...Bg7
      • 2.Qxd6#
  • Tries
    • 1.Qc1+?
      • 1...Se3
        • 2.Qxe3#
      • 1...Qd2!
    • 1.Qc4+?
      • 1...Qd4+
        • 2.Qxd4#
      • 1...bxc4!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qg3#
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qd3
        • 2.Qe5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Se2
        • 2.Qf3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Se3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • Q(f);CHECK,OGATE::QAB1(F),XQ(f)
    • B(g);N_GUARD::QAB(F),XQ(f)
    • B(g);N_GUARD,P_PINB(E)::QAB(F),XQ(f)
  • Tries
    • Try
      • Q(F);CHECK,N_PINQ(f)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(F),XS(b)
      • Refutation
        • Q(f);P_SPINQ(f)
    • Try
      • Q(F);CHECK,N_PINQ(f)
      • Vars
        • Q(f);CHECK,N_GUARD,P_SPINQ(f)::QAR2(F),XQ(f)
      • Refutation
        • P(e);XQ(F)
  • Actual
    • Q(F);N_PINQ(f)
    • Threat
      • QAB1(F)
    • Vars
      • Q(f);OGATE,P_PINQ(F),XB(E)::QAR2(F),XQ(f)
      • Q(f);N_GUARD::QAB1(F)
      • Q(f);N_GUARD,P_PINQ(F)::QAB1(F),XQ(f)
      • Q(f);N_GUARD,P_PINQ(F)::QAR2(F),XQ(f)
      • S(a);N_GUARD::QAR1(F)
      • S(a);N_GUARD::QAR1(F),XS(a)
      • S(b);N_GUARD::QAB1(F),XS(b)
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