MESON Chess Problem Database

Problem Display
PID: 73706 (1R4RK/k5p1/N1ppP3/1P2Q3/8/3p2rp/5n1b/6qb w - - 0 1)

Heilbut, H

Tijdschrift vd KNSB, 1938

1R4RK/k5p1/N1ppP3/1P2Q3/8/3p2rp/5n1b/6qb

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Rxg7#
      • 2.Qxg7#
    • 1...d5
      • 2.Qc7#
    • 1...g5
      • 2.Rg7#
      • 2.Qg7#
    • 1...g6
      • 2.Rg7#
      • 2.Qg7#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Rb7#
        • 2.b6#
      • 1...dxc5
        • 2.Qc7#
        • 2.Qxc5#
      • 1...Qb1
        • 2.Rb7#
      • 1...cxb5!
    • 1.Ra8+?
      • 1...Kb7
        • 2.Rgb8#
      • 1...Kb6!
    • 1.Qxd6?
      • threat
        • 2.Qc5#
        • 2.Qc7#
        • 2.Qe7#
        • 2.Qd7#
      • 1...cxb5
        • 2.Qb6#
      • 1...c5
        • 2.Qxc5#
        • 2.Qb6#
      • 1...Qc1
        • 2.Qc7#
        • 2.Qe7#
        • 2.Qd7#
      • 1...Rg2
        • 2.Qc5#
      • 1...Re3
        • 2.Qc5#
      • 1...Rf3
        • 2.Qc5#
      • 1...Rg4
        • 2.Qc5#
      • 1...Rg6
        • 2.Qc5#
      • 1...Sd1
        • 2.Qc7#
        • 2.Qe7#
        • 2.Qd7#
      • 1...Se4
        • 2.Qc7#
        • 2.Qe7#
        • 2.Qd7#
      • 1...Sg4
        • 2.Rxg7#
        • 2.Qc7#
        • 2.Qe7#
        • 2.Qd7#
      • 1...Rg5!
  • Keys
    • 1.Sb4!
      • threat
        • 2.b6#
      • 1...cxb5
        • 2.Qd4#
      • 1...Sd1
        • 2.Qa1#
      • 1...Se4
        • 2.Sxc6#
      • 1...Sg4
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(i);OGATE::QAR2(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);::R1(E)
      • Refutation
        • P(h);XP(A)
    • Try
      • R(E);CHECK
      • Vars
        • K(j);P-FLIGHT::R1(F)
      • Refutation
        • K(j);S_FLIGHT
    • Try
      • Q(B);XP(i)
      • Threat
        • DUALS(4)
      • Vars
        • P(h);OGATE,XP(A)::QAB1(B)
        • R(f);::QAB(B)
      • Refutation
        • R(f);
  • Actual
    • S(C);
    • Threat
      • P(A)
    • Vars
      • P(h);N_GUARD,XP(A)::QAB(B)
      • S(c);S_CUTQ(a)::QAR(B)
      • S(c);S_CUTB(b)::S(C),XP(h)
      • S(c);S_CUTR(f)::QAR(B),XP(k)
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