MESON Chess Problem Database

Problem Display
PID: 273214 (n1b2Q1K/n1pp1N2/3R3p/B1k4P/8/6p1/6Pb/5B2 w - - 0 1)

Maleika, Gerhard

Springaren, 1989

n1b2Q1K/n1pp1N2/3R3p/B1k4P/8/6p1/6Pb/5B2

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...cxd6
      • 2.Qxd6#
    • 1...c6
      • 2.Rxd7#
  • Tries
    • 1.Rd1+?
      • 1...Kc6
        • 2.Sd8#
      • 1...d6!
    • 1.Rd2+?
      • 1...Kc6
        • 2.Sd8#
      • 1...d6!
    • 1.Qe7?
      • threat
        • 2.Qe3#
        • 2.Qe5#
      • 1...cxd6
        • 2.Qxd6#
      • 1...Bg1
        • 2.Qe5#
      • 1...Bb7
        • 2.Qe3#
      • 1...Sb5
        • 2.Qe5#
      • 1...Sb6
        • 2.Qe3#
      • 1...Sc6!
    • 1.Qg7?
      • threat
        • 2.Qc3#
        • 2.Qd4#
        • 2.Qe5#
      • 1...Bg1
        • 2.Qc3#
        • 2.Qe5#
      • 1...Ba6
        • 2.Qd4#
        • 2.Qe5#
      • 1...Bb7
        • 2.Qc3#
        • 2.Qd4#
      • 1...Sb5
        • 2.Qe5#
      • 1...Sc6
        • 2.Qc3#
      • 1...Sb6
        • 2.Qd4#
      • 1...cxd6!
  • Keys
    • 1.Qxh6!
      • threat
        • 2.Qc1#
        • 2.Qe3#
        • 2.Qg5#
      • 1...cxd6
        • 2.Qxd6#
      • 1...Bg1
        • 2.Qc1#
        • 2.Qg5#
      • 1...Ba6
        • 2.Qe3#
        • 2.Qg5#
      • 1...Bb7
        • 2.Qc1#
        • 2.Qe3#
      • 1...Sb5
        • 2.Qg5#
      • 1...Sc6
        • 2.Qc1#
      • 1...Sb6
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(f);OGATE,P_SPINP(f),XR(E)::QAB1(G),XP(f)
    • P(f);SBLOCK::QAB(G)+R(E),XP(g)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(c);P-FLIGHT,S_CUTP(g)::S(F)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • R(E);CHECK
      • Vars
        • K(c);P-FLIGHT,S_CUTP(g)::S(F)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);OGATE,P_SPINP(f),XR(E)::QAB1(G),XP(f)
        • B(a);::QAR2(G)
        • B(i);::QAB(G)
        • S(e);::QAR2(G)
        • S(h);::QAB(G)
      • Refutation
        • S(e);
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • S(e);::QAR2(G)
        • S(h);::QAB1(G)
      • Refutation
        • P(f);XR(E)
  • Actual
    • Q(G);XP(d)
    • Threat
      • DUALS(3)
    • Vars
      • P(f);OGATE,XR(E)::QAB1(G),XP(f)
      • S(e);::QAR(G)
      • S(h);::QAB(G)
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