MESON Chess Problem Database

Problem Display
PID: 76664 (8/2Kp3B/p2N1pn1/5QN1/2pk1B2/6bR/8/4R3 w - - 0 1)

Holladay, Edgar Dinwiddie

1st Prize, American Chess Problemist, 1951-1952

8/2Kp3B/p2N1pn1/5QN1/2pk1B2/6bR/8/4R3

#2

8 + 7

6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Rd1#
      • 2.Re4#
    • 1...Bh2
      • 2.Rd1#
      • 2.Re4#
    • 1...Bxf4
      • 2.Re4#
    • 1...Bh4
      • 2.Rd1#
      • 2.Re4#
    • 1...c3
      • 2.Sf3#
      • 2.Be3#
      • 2.Rd1#
    • 1...a5
      • 2.Sb5#
  • Tries
    • 1.Rxg3?
      • threat
        • 2.Rd1#
        • 2.Re4#
      • 1...Sxf4
        • 2.Re4#
      • 1...Se5!
    • 1.Qe4+?
      • 1...Kc5
        • 2.Qxc4#
      • 1...Kc3!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Rd1#
      • 1...Kd3
        • 2.Qd2#
      • 1...Bxe1
        • 2.Sf5#
      • 1...Bxf4
        • 2.Re4#
      • 1...Sxf4
        • 2.Sf3#
      • 1...Se5
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(a);P_PINS(F),XB(C)::R1(A)
    • P(d);N_GUARD::S(F)
  • Tries
    • Try
      • R(B);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(f);XB(C)::R1(A)
      • Refutation
        • S(f);
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(D),XP(b)
      • Refutation
        • K(c);P_SPINB(a),S_FLIGHT
  • Actual
    • Q(D);
    • Threat
      • R(A)
    • Vars
      • K(c);P-FLIGHT,P_SPINB(a),P_SPINS(f)::QAR1(D)
      • B(a);XR(A)::S(F)
      • B(a);P_PINS(F),XB(C)::R1(A)
      • S(f);XB(C)::S(E)
      • S(f);::B(C)
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