MESON Chess Problem Database

Problem Display
PID: 9859 (N7/R2K4/P2pp3/Pkp1R3/pn1Q4/b2r4/bN4p1/4BB2 w - - 0 1)

Holladay, Edgar Dinwiddie

Correspondence Chess, 1960

N7/R2K4/P2pp3/Pkp1R3/pn1Q4/b2r4/bN4p1/4BB2

#2

10 + 10

3174 The Two-move Chess Problem Tradition and Development 1966
6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb2
      • 2.Qxb4#
    • 1...Sc2
      • 2.Sc7#
      • 2.Qxa4#
    • 1...Sd5
      • 2.Qxa4#
    • 1...Sxa6
      • 2.Rb7#
      • 2.Qxa4#
    • 1...Sc6
      • 2.Sc7#
      • 2.Qxa4#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sc7#
      • 1...Sxa6
        • 2.Sxa3#
        • 2.Sxd6#
        • 2.Rb7#
      • 1...Sd5
        • 2.Sxa3#
        • 2.Sxd6#
      • 1...Bxc4!
    • 1.Bxb4?
      • threat
        • 2.Sc7#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Bxb4!
    • 1.Qxd3+?
      • 1...Kxa5
        • 2.Qb5#
      • 1...Sxd3
        • 2.Sc7#
      • 1...Bc4!
  • Keys
    • 1.Kxd6!
      • threat
        • 2.Rxc5#
      • 1...Kxa5
        • 2.Rxc5#
      • 1...Sxa6
        • 2.Rb7#
      • 1...Bd5
        • 2.Qxc5#
      • 1...Sc2
        • 2.Sc7#
      • 1...Sd5
        • 2.Qxa4#
      • 1...Sc6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD,XS(C)::QAR1(D),XS(f)
    • S(f);N_SPINP(h),OGATE::QAB1(D),XP(e)
  • Tries
    • Try
      • S(C);N_PINR(d)
      • Threat
        • S(J)
      • Refutation
        • B(a);XS(C)
    • Try
      • B(A);XS(f)
      • Threat
        • S(J)
      • Vars
        • B(a);N_GUARD,N_SPINR(d)::QAB1(D),XB(a)
      • Refutation
        • B(c);XB(A)
    • Try
      • Q(D);CHECK,XR(d)
      • Vars
        • K(g);P-FLIGHT,P_SPINS(f),XP(E)::QAR1(D)
        • S(f);P_SPINS(f),XQ(D)::S(J)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • K(I);P-FLIGHT,P_SPINQ(D),XP(i)
    • Threat
      • R1(F),XP(h)
    • Vars
      • K(g);N_SPINR(d),P-FLIGHT,P_SPINS(f),XP(E)::R(F),XP(h)
      • S(f);SBLOCK,XP(G)::R(H)
      • B(a);N_PINQ(D),N_SPINP(h)::QAR1(D),XP(h)
      • S(f);::S(J)
      • S(f);N_PINQ(D),N_SPINP(h)::QAB1(D),XP(e)
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