MESON Chess Problem Database

Problem Display
PID: 88535 (1r2k1Br/2Q1B2n/b7/8/2n2K2/8/8/8 w k - 0 1)

Holladay, Edgar Dinwiddie

American Chess Problemist, 1950

1r2k1Br/2Q1B2n/b7/8/2n2K2/8/8/8

#2

4 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qd8#
    • 1...Rb2
      • 2.Qd8#
    • 1...Rb3
      • 2.Qd8#
    • 1...Rb4
      • 2.Qd8#
    • 1...Rb5
      • 2.Qd8#
    • 1...Rb6
      • 2.Qd8#
    • 1...Rb7
      • 2.Qd8#
    • 1...Rd8
      • 2.Qxd8#
    • 1...Bc8
      • 2.Qd8#
  • Tries
    • 1.Bc5?
      • threat
        • 2.Bf7#
        • 2.Qe7#
      • 1...Rxg8
        • 2.Qe7#
      • 1...Rb7
        • 2.Bf7#
        • 2.Qc8#
      • 1...Se5
        • 2.Qe7#
      • 1...Sg5
        • 2.Qe7#
      • 1...Sd6!
    • 1.Bd6?
      • threat
        • 2.Bf7#
        • 2.Qe7#
      • 1...Rxg8
        • 2.Qe7#
      • 1...Rb7
        • 2.Bf7#
        • 2.Qc8#
      • 1...Se5
        • 2.Qe7#
      • 1...Sg5
        • 2.Qe7#
      • 1...Sxd6!
    • 1.Bf6?
      • threat
        • 2.Qe7#
        • 2.Qf7#
      • 1...Kf8
        • 2.Qf7#
      • 1...Rxg8
        • 2.Qe7#
      • 1...Rb7
        • 2.Qd8#
        • 2.Qc8#
      • 1...Se5
        • 2.Qe7#
      • 1...Sd6
        • 2.Qe7#
      • 1...Sg5
        • 2.Qe7#
      • 1...Sxf6!
    • 1.Bd8?
      • threat
        • 2.Qe7#
      • 1...Kf8
        • 2.Qf7#
      • 1...Rxd8
        • 2.Qf7#
      • 1...Rb7!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Qe7#
      • 1...Kxf8
        • 2.Qf7#
      • 1...Sxf8
        • 2.Bf7#
      • 1...Rb7
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(d);N_GUARD::QAR1(B)
    • R(d);N_GUARD::QAR1(B),XR(d)
    • B(b);S_CUTR(d)::QAR1(B)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);XB(D)::QAR1(B)
        • S(a);::QAR1(B)
        • S(c);::QAR1(B)
      • Refutation
        • S(a);
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);XB(D)::QAR1(B)
        • S(a);::QAR1(B)
        • S(c);::QAR1(B)
      • Refutation
        • S(a);XB(C)
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P-FLIGHT::QAR1(B)
        • R(f);XB(D)::QAR1(B)
        • S(a);::QAR1(B)
        • S(c);::QAR1(B)
      • Refutation
        • S(c);XB(C)
    • Try
      • B(C);
      • Threat
        • QAR1(B)
      • Vars
        • K(e);P-FLIGHT::QAR1(B)
        • R(d);SBLOCK,XB(C)::QAB1(B)
      • Refutation
        • R(d);
  • Actual
    • B(C);
    • Threat
      • QAR1(B)
    • Vars
      • K(e);P-FLIGHT,XB(C)::QAR1(B)
      • S(c);SBLOCK,XB(C)::B(D)
      • R(d);N_GUARD,S_CUTB(b)::QAR2(B)
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