MESON Chess Problem Database

Problem Display
PID: 77213 (2B4K/r2n1p2/rRn4p/3N1kpp/5B2/3P1N1P/6Q1/7b w - - 0 1)

Holladay, Edgar Dinwiddie

4th Prize, Pillsbury MT, 1964

2B4K/r2n1p2/rRn4p/3N1kpp/5B2/3P1N1P/6Q1/7b

#2

9 + 10

6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Sd4#
    • 1...Kg6
      • 2.Sh4#
    • 1...Sb4
      • 2.Sd4#
    • 1...Sd4
      • 2.Sxd4#
    • 1...Sa5
      • 2.Sd4#
    • 1...Se5
      • 2.Sd4#
    • 1...Se7
      • 2.Sd4#
    • 1...Sb8
      • 2.Sd4#
    • 1...Sd8
      • 2.Sd4#
  • Tries
    • 1.Bxd7+?
      • 1...Kg6
        • 2.Sh4#
        • 2.Se5#
      • 1...Rxd7!
    • 1.Qg4+?
      • 1...Kg6
        • 2.Sh4#
      • 1...hxg4!
    • 1.Qxg5+?
      • 1...Ke6
        • 2.Sd4#
        • 2.Qe5#
      • 1...hxg5!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qf6#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kg6
        • 2.Se7#
      • 1...Sd4
        • 2.Sxd4#
      • 1...Se5
        • 2.Sd4#
        • 2.Qxe5#
      • 1...f6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • K(b);N_SPINS(i),P_SPINS(f),S_FLIGHT::S(C)
    • K(b);N_SPINS(i),P_SPINP(c),P_SPINS(f),S_FLIGHT::S(C)
    • S(f);N_GUARD::S(C)
    • S(f);N_GUARD::S(C),XS(f)
  • Tries
    • Try
      • B(H);CHECK,XS(i)
      • Refutation
        • R(h);XB(H)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINS(i),P_SPINP(c),P_SPINS(f),S_FLIGHT::S(C)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);CHECK,XP(c)
      • Refutation
        • P(g);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);N_SPINS(i),P_SPINS(f),S_FLIGHT::QAR1(A)
      • K(b);N_SPINS(i),P_SPINS(f),S_FLIGHT::S(F)
      • S(f);N_GUARD::S(C),XS(f)
      • P(j);::QAR1(A),XP(j)
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