MESON Chess Problem Database

Problem Display
PID: 81507 (8/1N1b4/4k1P1/1nR4p/rr3p1B/pq6/B4Q2/5K2 w - - 0 1)

Holladay, Edgar Dinwiddie

The Field, 1952

(First published on Sat Jan 26 1952)

8/1N1b4/4k1P1/1nR4p/rr3p1B/pq6/B4Q2/5K2

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4+
      • 2.Qe2#
    • 1...Sd6
      • 2.Sd8#
  • Tries
    • 1.Bxb3+?
      • 1...Rc4
        • 2.Qe1#
        • 2.Qe2#
      • 1...Rxb3!
    • 1.Qe3+?
      • 1...Re4
        • 2.Qh3#
      • 1...fxe3!
    • 1.Qg2?
      • threat
        • 2.Qh3#
      • 1...Qc4+
        • 2.Qe2#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Rc4
        • 2.Qd5#
      • 1...Sd4
        • 2.Qe4#
      • 1...Sd6
        • 2.Sd8#
      • 1...f3!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qh3#
      • 1...Qc4+
        • 2.Qe2#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Rc4
        • 2.Qd5#
      • 1...Sd4
        • 2.Qe4#
      • 1...Sd6
        • 2.Sd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);CHECK,S_CUTR(d)::QAR(C)
    • S(f);SBLOCK::S(G)
  • Tries
    • Try
      • B(B);CHECK,XQ(b)
      • Refutation
        • R(d);XB(B)
    • Try
      • Q(C);CHECK
      • Vars
        • R(d);P_SPINR(d)::QAB(C)
      • Refutation
        • P(e);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • Q(b);CHECK,S_CUTR(d)::QAR(C)
        • Q(b);N_GUARD::QAB1(C),XQ(b)
        • R(d);N_SPINQ(b),S_CUTQ(b)::QAB1(C)
        • S(f);S_CUTR(d)::QAR2(C)
        • S(f);SBLOCK::S(G)
      • Refutation
        • P(e);
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • Q(b);CHECK,S_CUTR(d)::QAR(C)
      • Q(b);N_GUARD::QAB1(C),XQ(b)
      • R(d);N_SPINQ(b),S_CUTQ(b)::QAB1(C)
      • S(f);S_CUTR(d)::QAR2(C)
      • S(f);SBLOCK::S(G)
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