MESON Chess Problem Database

Problem Display
PID: 16979 (1R5n/kN3r1R/p1n5/8/8/8/7B/1Q4bK w - - 0 1)

Holladay, Edgar Dinwiddie

American Chess Bulletin, 1945

1R5n/kN3r1R/p1n5/8/8/8/7B/1Q4bK

#2

6 + 6

3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb7
      • 2.Rhxb7#
      • 2.Qxb7#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sxc6#
      • 1...Sxb8
        • 2.Qxb8#
      • 1...Sxd8
        • 2.Bxg1#
        • 2.Qxg1#
      • 1...Sb4
        • 2.Qxg1#
      • 1...Sd4
        • 2.Qb6#
      • 1...Sa5
        • 2.Bxg1#
        • 2.Qxg1#
      • 1...Se5
        • 2.Bxg1#
      • 1...Se7
        • 2.Qb7#
      • 1...a5!
    • 1.Qxg1+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Rf2!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Sxc6#
      • 1...Sxa5
        • 2.Bxg1#
        • 2.Qxg1#
      • 1...Sxb8
        • 2.Qxb8#
      • 1...Sb4
        • 2.Qxg1#
      • 1...Sd4
        • 2.Qb6#
      • 1...Se5
        • 2.Bxg1#
      • 1...Se7
        • 2.Qb7#
      • 1...Sd8
        • 2.Bxg1#
        • 2.Qxg1#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);P_PINR(e)
      • Threat
        • S(D),XS(c)
      • Vars
        • S(c);OGATE,XR(F)::QAB1(A),XS(c)
        • S(c);N_GUARD::QAB(A),XB(a)
        • S(c);S_CUTB(a)::QAB1(A)
        • S(c);N_GUARD::B(C),XB(a)
        • S(c);N_SPINR(e),S_CUTR(e)::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK,XB(a)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(A),XS(c)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • S(D);P_PINR(e)
    • Threat
      • S(D),XS(c)
    • Vars
      • S(c);OGATE,XR(F)::QAB1(A),XS(c)
      • S(c);N_GUARD::QAB(A),XB(a)
      • S(c);S_CUTB(a)::QAB1(A)
      • S(c);N_GUARD::B(C),XB(a)
      • S(c);N_SPINR(e),S_CUTR(e)::QAR1(A)
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