MESON Chess Problem Database

Problem Display
PID: 76666 (7n/3p3K/7R/r2Qn1N1/2b1p1k1/4B3/4p3/bq1B1R1N w - - 0 1)

Holladay, Edgar Dinwiddie

3rd Prize, Chess Life, 1951-1952

7n/3p3K/7R/r2Qn1N1/2b1p1k1/4B3/4p3/bq1B1R1N

#2

8 + 10

6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Qxe4#
    • 1...Qc1
      • 2.Qxe4#
    • 1...Qxd1
      • 2.Qxe4#
    • 1...Qb2
      • 2.Qxe4#
    • 1...Qb3
      • 2.Qxe4#
    • 1...Qb4
      • 2.Qxe4#
    • 1...Qb5
      • 2.Qxe4#
    • 1...Qb6
      • 2.Qxe4#
    • 1...Qb8
      • 2.Qxe4#
    • 1...Sd3
      • 2.Bxe2#
      • 2.Rg1#
    • 1...Sc6
      • 2.Rg1#
      • 2.Rf4#
    • 1...Seg6
      • 2.Rg1#
    • 1...Sef7
      • 2.Rg1#
      • 2.Rf4#
  • Tries
    • 1.Sf2+?
      • 1...Kg3
        • 2.Rg1#
      • 1...Kf5!
    • 1.Qxd7+?
      • 1...Be6
        • 2.Qxe6#
      • 1...Sxd7!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Rf4#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Sd3
        • 2.Bxe2#
      • 1...Sf3
        • 2.Sf2#
      • 1...Seg6
        • 2.Sef2#
      • 1...Shg6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::QAR2(E),XP(e)
    • Q(b);N_GUARD,N_SPINP(c),XB(A)::QAR2(E),XP(e)
    • S(h);::R(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(f);N_SPINP(c),P-FLIGHT::R(B)
      • Refutation
        • K(f);N_SPINP(c),P_SPINS(h),S_FLIGHT
    • Try
      • Q(E);CHECK,XP(i)
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::QAB(E),XB(d)
      • Refutation
        • S(h);XQ(E)
  • Actual
    • S(F);P_SPINS(F),XP(e)
    • Threat
      • R1(B)
    • Vars
      • Q(b);CHECK,OGATE,XS(F)::QAR2(E),XQ(b)
      • S(h);N_GUARD,N_PINS(F),S_CUTB(d)::B(A),XP(c)
      • S(h);N_SPINP(c),SBLOCK::S(C)
      • S(h);N_PINS(F)::S(F)
      • S(j);N_PINS(F)::S(F)
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