MESON Chess Problem Database

Problem Display
PID: 77355 (1r6/3Q4/4p3/b1p5/5BB1/rp3Kp1/1pPp4/n2kN2R w - - 0 1)

Holladay, Edgar Dinwiddie

HM., The Problemist, 1979

1r6/3Q4/4p3/b1p5/5BB1/rp3Kp1/1pPp4/n2kN2R

#2

7 + 11

6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Qxd2#
    • 1...Bb6
      • 2.Qxd2#
    • 1...Bc7
      • 2.Qxd2#
    • 1...Bd8
      • 2.Qxd2#
    • 1...bxc2+
      • 2.Sd3#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Sg2#
      • 1...Kc1
        • 2.Sg2#
      • 1...Sxc2
        • 2.Sxc2#
      • 1...g2
        • 2.Sxg2#
      • 1...Rh8!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Sg2#
      • 1...dxe1S+
        • 2.Kxg3#
      • 1...bxc2+
        • 2.Sd3#
      • 1...Kc1
        • 2.Sg2#
      • 1...Sxc2
        • 2.Sxc2#
      • 1...dxe1Q
        • 2.Kg2#
      • 1...dxe1B
        • 2.Kg2#
      • 1...dxe1R
        • 2.Kg2#
        • 2.Kxg3#
      • 1...g2
        • 2.Sxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • R(k);S_CUTB(h)::QAR1(G),XP(d)
    • B(h);N_GUARD::QAR1(G),XP(d)
    • P(f);CHECK,SBLOCK,XP(C)::R(B)+S(A)
  • Tries
    • Try
      • Q(G);
      • Threat
        • R(B)+S(A)
      • Vars
        • K(b);P-FLIGHT::R(B)+S(A)
        • S(a);XP(C)::R(B)+S(A),XS(a)
        • P(g);::R(B)+S(A),XP(g)
      • Refutation
        • R(k);
  • Actual
    • Q(G);N_PINP(d)
    • Threat
      • R(B)+S(A)
    • Vars
      • P(d);CHECK,P_SPINS(d),XS(A)::B(F)+K(D),XP(g)
      • P(f);CHECK,SBLOCK,XP(C)::R(B)+S(A)
      • K(b);P-FLIGHT,P_SPINP(d)::R(B)+S(A)
      • S(a);XP(C)::R(B)+S(A),XS(a)
      • P(d);P_SPINQ(d),XS(A)::B(F)+K(D)
      • P(d);P_SPINB(d),XS(A)::B(F)+K(D)
      • P(g);::R(B)+S(A),XP(g)
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