MESON Chess Problem Database

Problem Display
PID: 770 (2nRBR2/r5pK/4k1N1/bp5p/4P3/2p1Q1p1/4N3/3rnq2 w - - 0 1)

Holladay, Edgar Dinwiddie

1st Prize, British Chess Magazine, 1954

2nRBR2/r5pK/4k1N1/bp5p/4P3/2p1Q1p1/4N3/3rnq2

#2

8 + 12

3147 Chess Problems: Introduction to an Art 1963
3105 FIDE Album (1945-1955) 1964
1542 Chess Life & Review 1970
6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Sef4#
    • 1...Qh3
      • 2.Sef4#
    • 1...Qg1
      • 2.Sef4#
    • 1...Qh1
      • 2.Sef4#
    • 1...Qf4
      • 2.Sexf4#
    • 1...Qf5
      • 2.exf5#
    • 1...Ra1
      • 2.Sd4#
    • 1...Rb1
      • 2.Sd4#
    • 1...Rc1
      • 2.Sd4#
    • 1...Rd4
      • 2.Sxd4#
    • 1...Rd5
      • 2.exd5#
    • 1...Sd3
      • 2.Sd4#
    • 1...Sf3
      • 2.Sef4#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qe5#
      • 1...Rxd4
        • 2.Sxd4#
      • 1...Qf4
        • 2.Sexf4#
      • 1...Qf5
        • 2.exf5#
      • 1...Bc7
        • 2.Bd7#
      • 1...Sd3
        • 2.Qd5#
      • 1...Sf3
        • 2.Sef4#
      • 1...Qf6!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qe5#
      • 1...Qxf4
        • 2.Sexf4#
      • 1...Rd5
        • 2.exd5#
      • 1...Bc7
        • 2.Bf7#
      • 1...Sd3
        • 2.Sd4#
      • 1...Sf3
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • Q(c);N_GUARD::S(A)
    • Q(c);N_GUARD::S(A),XQ(c)
    • Q(c);OGATE,P_PINS(D)::QAR(B)+P(C)DCHECK,XQ(c)
    • R(a);N_GUARD::S(A)
    • R(a);N_GUARD::S(A),XR(a)
    • R(a);OGATE::QAR(B)+P(C)DCHECK,XR(a)
    • S(b);S_CUTR(a)::S(A)
    • S(b);S_CUTQ(c)::S(A)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(a);XQ(B)::S(A),XR(a)
        • Q(c);N_GUARD::S(A),XQ(c)
        • Q(c);OGATE,P_PINS(D)::P(C),XQ(c)
        • B(f);S_CUTR(j)::B(G)
        • S(b);S_CUTR(a)::QAB1(B)
        • S(b);S_CUTQ(c)::S(A)
      • Refutation
        • Q(c);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • Q(c);XQ(B)::S(A),XQ(c)
      • R(a);OGATE::P(C),XR(a)
      • B(f);S_CUTR(j)::B(G)
      • S(b);S_CUTR(a)::S(A)
      • S(b);S_CUTQ(c)::QAB1(B)
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