MESON Chess Problem Database

Problem Display
PID: 57421 (b7/6r1/NR1P1RN1/1r1k3q/p2p4/1p1P1p1n/1P1n4/K6Q w - - 0 1)

Holladay, Edgar Dinwiddie

Chess Life, 1956

b7/6r1/NR1P1RN1/1r1k3q/p2p4/1p1P1p1n/1P1n4/K6Q

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Sb4#
    • 1...Sg1
      • 2.Qxh5#
    • 1...Sf2
      • 2.Qxh5#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qe6#
      • 1...Qg4
        • 2.Qe5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Re7
        • 2.Sxe7#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf4
        • 2.Sxf4#
      • 1...Sg5
        • 2.Sf4#
        • 2.Rf5#
        • 2.Qe5#
      • 1...Rxb6!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Rxb5#
      • 1...Rxb6
        • 2.Qc5#
      • 1...Rb4
        • 2.Sxb4#
        • 2.Qc5#
      • 1...Ra5
        • 2.Sb4#
      • 1...Rc5
        • 2.Sb4#
        • 2.Qxc5#
      • 1...Rb7
        • 2.Qc6#
      • 1...Rc7
        • 2.Sxc7#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Se4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • R(g);N_GUARD,SBLOCK::S(E)
    • S(d);OGATE::QAR(B),XQ(i)
  • Tries
    • Try
      • Q(B);N_PINP(c)
      • Threat
        • QAB1(B)
      • Vars
        • Q(i);N_GUARD::QAR1(B)
        • Q(i);N_GUARD::QAR1(B),XQ(i)
        • Q(i);N_GUARD::R(H),XQ(i)
        • R(j);N_GUARD::S(I),XR(j)
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(d);N_GUARD::S(I),XS(d)
      • Refutation
        • R(g);XR(F)
  • Actual
    • Q(B);N_PINP(c)
    • Threat
      • R(F),XR(g)
    • Vars
      • R(g);N_GUARD,XR(F)::QAR1(B)
      • R(g);N_GUARD::S(E)
      • R(j);S_CUTB(k)::QAB1(B)
      • R(j);N_GUARD::S(E),XR(j)
      • B(k);N_GUARD::QAB1(B),XB(k)
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(a);N_GUARD::QAB1(B)
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