MESON Chess Problem Database

Problem Display
PID: 76586 (1nn1Q1B1/3q4/P1Pkbp2/3N4/1N3P2/B7/2R1p3/1KR5 w - - 0 1)

Holladay, Edgar Dinwiddie

4th Prize, Echec et Mat, 1948

1nn1Q1B1/3q4/P1Pkbp2/3N4/1N3P2/B7/2R1p3/1KR5

#2

11 + 7

6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6
      • 2.Qxe6#
    • 1...Qa7
      • 2.Qxe6#
    • 1...Qb7
      • 2.Qxe6#
    • 1...Qc7
      • 2.Qxe6#
    • 1...Qg7
      • 2.Qxe6#
    • 1...Qh7
      • 2.Qxe6#
    • 1...Qd8
      • 2.Qxe6#
    • 1...Bh3
      • 2.Sa2#
      • 2.Sd3#
    • 1...Bg4
      • 2.Sa2#
      • 2.Sd3#
    • 1...Bxd5
      • 2.Sxd5#
    • 1...Bf5
      • 2.Sa2#
      • 2.Sd3#
  • Tries
    • 1.Qxd7+?
      • 1...Bxd7
        • 2.Sa2#
        • 2.Sd3#
      • 1...Sxd7!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Sa2#
      • 1...Qh7+
        • 2.Sc2#
      • 1...Bf5+
        • 2.Sd3#
      • 1...Qxc6
        • 2.Sxc6#
        • 2.Qxe6#
      • 1...Bxd5
        • 2.Sxd5#
      • 1...Sxa6
        • 2.Sxa6#
      • 1...Sxc6
        • 2.Sxc6#
      • 1...Qa7
        • 2.Qxe6#
      • 1...Qb7
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(e);N_GUARD,XP(I)::QAR1(J),XB(c)
    • Q(e);N_GUARD::QAR1(J),XB(c)
    • Q(e);N_GUARD,P_PINS(E)::QAR1(J),XB(c)
    • Q(e);N_GUARD,P_PINR(C)::QAR1(J),XB(c)
    • B(c);XS(G)::B(D)+S(E),XB(c)
  • Tries
    • Try
      • Q(J);CHECK,XQ(e)
      • Refutation
        • S(f);XQ(J)
  • Actual
    • R(C);
    • Threat
      • B(D)+S(E)
    • Vars
      • Q(e);CHECK::B(D)+S(E)
      • B(c);CHECK::B(D)+S(E)
      • B(c);P_SPINB(c),XS(G)::B(D)+S(E),XB(c)
      • S(f);XP(H)::B(D)+S(E),XS(f)
      • S(f);XP(I)::B(D)+S(E),XS(f)
      • Q(e);N_GUARD::QAR1(J),XB(c)
      • Q(e);N_GUARD,P_PINS(E)::QAR1(J),XB(c)
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