MESON Chess Problem Database

Problem Display
PID: 8211 (K1R2n2/b1N4B/4P3/1Q6/3k2N1/3r4/b7/4B3 w - - 0 1)

Burger, Robert Eugene

3rd Prize, The Problemist, 1995/II

K1R2n2/b1N4B/4P3/1Q6/3k2N1/3r4/b7/4B3

#2

8 + 5

145 StrateGems 1998

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Qd5#
    • 1...Bb1
      • 2.Qb4#
      • 2.Qd5#
    • 1...Bc4
      • 2.Qe5#
    • 1...Bd5+
      • 2.Qxd5#
    • 1...Bc5
      • 2.Qxd3#
  • Tries
    • 1.Rd8+?
      • 1...Bd5+
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Sd7!
    • 1.Qa4+?
      • 1...Bc4
        • 2.Qxa7#
      • 1...Kc5!
    • 1.Qc6?
      • threat
        • 2.Sb5#
      • 1...Bc5
        • 2.Qe4#
      • 1...Rb3
        • 2.Qd5#
      • 1...Bc4!
    • 1.Qb2+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Kc5!
    • 1.Qf5?
      • threat
        • 2.Sb5#
      • 1...Bd5+
        • 2.Qxd5#
      • 1...Rb3
        • 2.Qd5#
      • 1...Bc4
        • 2.Qe5#
      • 1...Bc5
        • 2.Qxd3#
        • 2.Qe4#
        • 2.Qf4#
      • 1...Kc4!
    • 1.Qb6+?
      • 1...Kc4
        • 2.Se5#
        • 2.Qb4#
      • 1...Bxb6!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Sb5#
      • 1...Kc4
        • 2.Qb4#
      • 1...Kc5
        • 2.Sb5#
      • 1...Rb3
        • 2.Qd5#
      • 1...Bc4
        • 2.Qxa7#
      • 1...Bc5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(b);S_CUTB(a)::QAR1(C)
    • B(a);SBLOCK::QAB1(C)
    • B(a);CHECK,N_GUARD::QAR1(C),XB(a)
    • B(d);SBLOCK::QAR1(C),XR(b)
  • Tries
    • Try
      • R(H);CHECK
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);P_SPINB(a),SBLOCK::QAB(C),XB(d)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • S(E)
      • Vars
        • B(d);SBLOCK::QAR1(C)
        • R(b);S_CUTB(a)::QAR1(C)
      • Refutation
        • B(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
        • R(b);N_GUARD,P_SPINR(b)::QAB1(C),XR(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • S(E)
      • Vars
        • B(a);CHECK,N_GUARD::QAR1(C),XB(a)
        • R(b);S_CUTB(a)::QAR1(C)
        • B(a);SBLOCK::QAB1(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • B(d);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • S(E)
    • Vars
      • K(c);P-FLIGHT::QAR1(C)
      • K(c);S_FLIGHT::R(H)+S(E)
      • R(b);S_CUTB(a)::QAR1(C)
      • B(a);SBLOCK::QAB(C),XB(d)
      • B(d);SBLOCK::QAR1(C)
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