MESON Chess Problem Database

Problem Display
PID: 76876 (4Bn2/3Rp3/K1p1k3/1R3b1N/2pp2Q1/8/2N5/b3nqr1 w - - 0 1)

Holladay, Edgar Dinwiddie

British Chess Magazine, 1957

4Bn2/3Rp3/K1p1k3/1R3b1N/2pp2Q1/8/2N5/b3nqr1

#2

7 + 11

6232 Holladay Chess Problems 2007
56 The Problemist 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2
      • 2.Qxf5#
    • 1...Qg2
      • 2.Qxf5#
    • 1...Rh1
      • 2.Qg8#
    • 1...Sg2
      • 2.Qg8#
    • 1...Sf3
      • 2.Qxf5#
    • 1...c3
      • 2.Sxd4#
    • 1...d3
      • 2.Qxc4#
  • Tries
    • 1.Sf4+?
      • 1...Kf6
        • 2.Rxf5#
      • 1...Qxf4!
    • 1.Qe2+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Qxe2!
  • Keys
    • 1.Qxd4!
      • threat
        • 2.Re5#
      • 1...Bxd4
        • 2.Sxd4#
      • 1...Sxd7
        • 2.Qxd7#
      • 1...cxb5
        • 2.Qd5#
      • 1...Qe2
        • 2.Sf4#
      • 1...Qf4
        • 2.Sxf4#
      • 1...Sd3
        • 2.Qxc4#
      • 1...Sf3
        • 2.Sf4#
      • 1...Sg6
        • 2.Sg7#
      • 1...c3
        • 2.Qe5#
      • 1...c5
        • 2.Rb6#
        • 2.Qd5#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::QAB1(B),XB(g)
    • R(d);N_GUARD::QAB(B)
    • S(b);S_CUTR(d)::QAB(B)
    • S(b);S_CUTQ(c)::QAB1(B),XB(g)
    • P(e);P_PINR(C),S_CUTB(a)::S(A),XP(f)
    • P(f);OGATE::QAB(B),XP(e)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(i);N_SPINB(g),P-FLIGHT::R1(C),XB(g)
      • Refutation
        • Q(c);XS(D)
    • Try
      • Q(B);CHECK,N_PINB(g)
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR2(B),XB(g)
      • Refutation
        • Q(c);XQ(B)
  • Actual
    • Q(B);N_PINB(g),XP(f)
    • Threat
      • R1(C)
    • Vars
      • B(a);XQ(B)::S(A),XB(a)
      • S(k);OGATE,XR(F)::QAB1(B),XS(k)
      • P(h);N_GUARD,XR(C)::QAB1(B)
      • Q(c);N_GUARD::S(D)
      • Q(c);N_GUARD::S(D),XQ(c)
      • S(b);S_CUTQ(c)::QAB(B),XP(e)
      • S(b);S_CUTQ(c)::S(D)
      • S(k);S_CUTR(d)::S(D)
      • P(e);P_PINR(C),S_CUTB(a)::QAR1(B)
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