MESON Chess Problem Database

Problem Display
PID: 239098 (NQ6/pp6/k5rR/1p3p2/5K1n/3B4/3B2p1/5bR1 w - - 0 1)

Segers, Marcel

The Problemist, 1988

NQ6/pp6/k5rR/1p3p2/5K1n/3B4/3B2p1/5bR1

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Sc7#
    • 1...Be2
      • 2.Ra1#
    • 1...Bxd3
      • 2.Ra1#
    • 1...b6
      • 2.Sc7#
      • 2.Qc8#
  • Tries
    • 1.Rxg6+?
      • 1...b6
        • 2.Sc7#
        • 2.Qc8#
      • 1...Sxg6+!
    • 1.Qe5?
      • threat
        • 2.Qa1#
        • 2.Qxb5#
      • 1...Bxd3
        • 2.Ra1#
        • 2.Qa1#
      • 1...b6!
    • 1.Qc7?
      • threat
        • 2.Qa5#
      • 1...b6
        • 2.Qc8#
      • 1...Rb6!
    • 1.Qc8?
      • 1...Bxd3
        • 2.Ra1#
      • 1...Rc6
        • 2.Rxc6#
      • 1...Rb6
        • 2.Sc7#
      • 1...Rd6
        • 2.Rxd6#
      • 1...Re6
        • 2.Rxe6#
      • 1...Rf6
        • 2.Rxf6#
      • 1...Be2
        • 2.Ra1#
      • 1...Sf3
        • 2.Rxg6#
      • 1...Rxh6!
    • 1.Qe8?
      • threat
        • 2.Qxb5#
      • 1...Bxd3
        • 2.Ra1#
      • 1...b6
        • 2.Qc8#
      • 1...Rc6!
    • 1.Qf8?
      • threat
        • 2.Qa3#
      • 1...b6
        • 2.Qc8#
      • 1...Rd6!
    • 1.Qg8?
      • threat
        • 2.Qa2#
      • 1...b6
        • 2.Qc8#
      • 1...Re6!
    • 1.Qh8?
      • threat
        • 2.Qa1#
      • 1...b6
        • 2.Qc8#
      • 1...Rf6!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qa5#
      • 1...b6
        • 2.Qc8#
      • 1...Rb6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(g);::S(F)
    • B(a);OGATE::R(A)
    • B(a);N_SPINP(d),OGATE,XB(C)::R(A)
  • Tries
    • Try
      • R(E);CHECK,XR(g)
      • Refutation
        • S(c);CHECK,XR(E)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Refutation
        • P(i);N_SPINR(g)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • P(i);N_SPINR(g),OGATEB::QAB(G)
      • Refutation
        • R(g);
    • Try
      • Q(G);
      • Vars
        • B(a);N_SPINP(d),OGATE,P_SPINP(i),XB(C)::R(A)
        • R(g);OGATE::R(E),XR(g)
        • R(g);::S(F)
        • B(a);OGATE::R(A)
        • S(c);N_GUARD::R(E),XR(g)
      • Refutation
        • R(g);N_SPINR(g),XR(E)
    • Try
      • Q(G);
      • Threat
        • QAB1(G),XP(d)
      • Vars
        • B(a);N_SPINP(d),OGATE,XB(C)::R(A)
        • P(i);N_SPINR(g),OGATEB::QAB(G)
      • Refutation
        • R(g);
    • Try
      • Q(G);
      • Threat
        • QAR(G)
      • Vars
        • P(i);N_SPINR(g),OGATEB::QAB(G)
      • Refutation
        • R(g);
    • Try
      • Q(G);
      • Threat
        • QAR(G)
      • Vars
        • P(i);N_SPINR(g),OGATEB::QAB(G)
      • Refutation
        • R(g);
    • Try
      • Q(G);
      • Threat
        • QAR(G)
      • Vars
        • P(i);N_SPINR(g),OGATEB::QAB(G)
      • Refutation
        • R(g);
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • P(i);N_SPINR(g),OGATEB::QAB(G)
      • R(g);::S(F)
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