MESON Chess Problem Database

Problem Display
PID: 1163 (1b2q3/5p2/4rp1n/R2B1k1K/3R1B2/8/8/Q7 w - - 0 1)

Shire, David J

2nd Prize, Problem Observer, 1994

1b2q3/5p2/4rp1n/R2B1k1K/3R1B2/8/8/Q7

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf4
      • 2.Be4#
    • 1...Be5
      • 2.Qb1#
  • Tries
    • 1.Ba2+?
      • 1...Re5
        • 2.Qb1#
      • 1...Be5
        • 2.Bb1#
        • 2.Qb1#
      • 1...Qb5!
    • 1.Bb3+?
      • 1...Re5
        • 2.Qb1#
      • 1...Be5
        • 2.Bc2#
        • 2.Qb1#
      • 1...Qb5!
    • 1.Bc4+?
      • 1...Re5
        • 2.Qb1#
      • 1...Be5
        • 2.Bd3#
        • 2.Qb1#
      • 1...Qb5!
    • 1.Bc6+?
      • 1...Be5
        • 2.Qb1#
      • 1...Re5!
  • Keys
    • 1.Be5!
      • threat
        • 2.Be4#
        • 2.Rf4#
      • 1...Kxe5
        • 2.Bc6#
      • 1...Rxe5
        • 2.Qf1#
      • 1...Bxe5
        • 2.Qb1#
      • 1...fxe5
        • 2.Qf1#
      • 1...Qb5
        • 2.Rf4#
      • 1...Qa4
        • 2.Be4#
      • 1...Qc6
        • 2.Rf4#
      • 1...Ra6
        • 2.Rf4#
      • 1...Rb6
        • 2.Rf4#
      • 1...Rc6
        • 2.Rf4#
      • 1...Rd6
        • 2.Rf4#
      • 1...Re7
        • 2.Rf4#

There are these versions: 33568

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • B(f);SBLOCK,XB(C)::R(D)+B(E),DCHECK
    • B(f);S_CUTR(b)::QAB(A)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB(A)
      • Refutation
        • Q(g);P_SPINQ(g)
    • Try
      • B(E);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB(A)
      • Refutation
        • Q(g);P_SPINQ(g)
    • Try
      • B(E);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB(A)
      • Refutation
        • Q(g);P_SPINQ(g)
    • Try
      • B(E);CHECK
      • Vars
        • B(f);P_SPINB(f)::QAB(A)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • B(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XB(C)::R(D)+B(E)
      • R(b);SBLOCK,XB(C)::QAR(A)
      • B(f);SBLOCK,XB(C)::QAB(A)
      • P(c);SBLOCK,XB(C)::QAR(A)
      • Q(g);::R1(B)
      • Q(g);::B(E)
      • R(b);::R1(B)
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