MESON Chess Problem Database

Problem Display
PID: 77111 (2r5/1N5p/4R3/2pk1P1K/R1p1p1pQ/r7/2NPPP2/6bb w - - 0 1)

Holladay, Edgar Dinwiddie

2nd Prize, BCF, 1958-1959

2r5/1N5p/4R3/2pk1P1K/R1p1p1pQ/r7/2NPPP2/6bb

#2

10 + 10

6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rd8
      • 2.Qxd8#
    • 1...c3
      • 2.Se3#
    • 1...e3
      • 2.Qxh1#
  • Tries
    • 1.Se3+?
      • 1...Kd4
        • 2.Rxc4#
        • 2.Qf6#
      • 1...Rxe3!
    • 1.Sb4+?
      • 1...Kd4
        • 2.Qf6#
      • 1...cxb4!
    • 1.Qg3?
      • threat
        • 2.Rd6#
        • 2.Qe5#
        • 2.Qd6#
      • 1...Rc6
        • 2.Re5#
        • 2.Qe5#
      • 1...Rd8
        • 2.Qe5#
      • 1...Bh2
        • 2.Rd6#
      • 1...e3
        • 2.Qe5#
        • 2.Qd6#
      • 1...Rxg3!
    • 1.d4?
      • threat
        • 2.Rd6#
      • 1...cxd4
        • 2.Sb4#
      • 1...cxd4 ep
        • 2.Se3#
      • 1...exd4 ep
        • 2.Qxh1#
      • 1...Rc6
        • 2.Re5#
      • 1...Rd8
        • 2.Qxd8#
      • 1...e3
        • 2.Qxh1#
      • 1...Bh2!
  • Keys
    • 1.f4!
      • threat
        • 2.Rd6#
      • 1...exf4 ep
        • 2.e4#
      • 1...gxf4 ep
        • 2.Qxe4#
      • 1...Rc6
        • 2.Re5#
      • 1...Rd8
        • 2.Qxd8#
      • 1...e3
        • 2.Qxh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(j);N_GUARD::QAR(F),XR(j)
    • P(d);S_CUTR(c)::S(A)
    • P(e);OGATEB::QAB(F),XB(b)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • R(c);XS(A)
    • Try
      • S(A);CHECK
      • Vars
        • K(h);P-FLIGHT::QAB(F)
      • Refutation
        • P(g);XS(A)
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • R(j);::QAR1(F)
        • B(a);::R1(I)
      • Refutation
        • R(c);XQ(F)
    • Try
      • P(B);
      • Threat
        • R1(I)
      • Vars
        • P(g);N_GUARD,SBLOCK,XP(B)::S(A)
        • P(d);EP,S_CUTR(c),XP(B)::S(A)
        • P(e);EP,OGATEB,XP(B)::QAB(F),XB(b)
        • R(j);SBLOCK::R1(I)
        • R(j);N_GUARD::QAR(F),XR(j)
        • P(e);OGATEB::QAB(F),XB(b)
      • Refutation
        • B(a);
  • Actual
    • P(D);
    • Threat
      • R1(I)
    • Vars
      • P(e);EP,OGATE,XP(D)::P(C)
      • P(f);EP,OGATE,XP(D)::QAB1(F),XP(e)
      • R(j);SBLOCK::R1(I)
      • R(j);N_GUARD::QAR(F),XR(j)
      • P(e);OGATEB::QAB(F),XB(b)
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