MESON Chess Problem Database

Problem Display
PID: 247243 (7k/R3p3/1p5K/4b3/2B1n3/2B1p2p/1Q5R/q7 w - - 0 1)

Fillery, William Edmund Frank

The Problemist, 1954

7k/R3p3/1p5K/4b3/2B1n3/2B1p2p/1Q5R/q7

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb2
      • 2.Ra8#
    • 1...Qb1
      • 2.Ra8#
    • 1...Qc1
      • 2.Ra8#
    • 1...Qe1
      • 2.Ra8#
    • 1...Qh1
      • 2.Ra8#
    • 1...Bg7+
      • 2.Bxg7#
    • 1...Sd2
      • 2.Bxe5#
    • 1...Sf2
      • 2.Bxe5#
    • 1...Sg3
      • 2.Bxe5#
    • 1...Sc5
      • 2.Bxe5#
    • 1...Sg5
      • 2.Bxe5#
    • 1...Sd6
      • 2.Bxe5#
  • Tries
    • 1.Rxe7?
      • threat
        • 2.Rh7#
        • 2.Re8#
      • 1...Bg7+
        • 2.Bxg7#
      • 1...Qf1
        • 2.Rh7#
      • 1...Qg1
        • 2.Rh7#
      • 1...Qa3
        • 2.Rh7#
      • 1...Qa4
        • 2.Rh7#
      • 1...Qa7
        • 2.Re8#
      • 1...Qa8
        • 2.Rh7#
      • 1...Sg5
        • 2.Bxe5#
        • 2.Re8#
      • 1...Sd6
        • 2.Bxe5#
        • 2.Rh7#
      • 1...Sf6!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qg8#
      • 1...Bg7+
        • 2.Qxg7#
      • 1...hxg2
        • 2.Kg6#
      • 1...Sf6
        • 2.Qg7#
      • 1...Qg1
        • 2.Ra8#
      • 1...Sg3
        • 2.Qa8#
      • 1...Sg5
        • 2.Qa8#
      • 1...e6
        • 2.Rh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(a);N_GUARD,XQ(A)::R(F)
    • Q(a);N_GUARD::R(F)
    • B(e);CHECK,OGATE::B(C),XB(e)
    • S(d);N_GUARD::B(C),XB(e)
  • Tries
    • Try
      • R(F);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);CHECK,OGATE::B(C),XB(e)
        • Q(a);::R1(F)
        • Q(a);::R(F)
        • Q(a);SBLOCK::R1(F)
      • Refutation
        • S(d);N_SPINB(e)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(e);CHECK,N_GUARD::QAB1(A),XB(e)
      • P(c);XQ(A)::R(B)+K(E)
      • S(d);N_SPINB(e),S_CUTB(e)::QAB1(A)
      • Q(a);N_GUARD::R(F)
      • S(d);OGATE::QAB1(A)
      • P(g);OGATE::R1(F)
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