MESON Chess Problem Database

Problem Display
PID: 199854 (3nr3/4R3/ppPB4/kBP1Q3/1pPN4/8/PR5b/n6K w - - 0 1)

Segers, Marcel

Suomen Shakki, 1989

3nr3/4R3/ppPB4/kBP1Q3/1pPN4/8/PR5b/n6K

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Sb3#
    • 1...Sb3
      • 2.Sxb3#
    • 1...Sxc6
      • 2.Sxc6#
    • 1...b3
      • 2.Qe1#
    • 1...axb5
      • 2.Ra7#
    • 1...bxc5
      • 2.Bc7#
  • Tries
    • 1.Bc7?
      • threat
        • 2.Bxb6#
      • 1...b3
        • 2.Qe1#
      • 1...axb5!
    • 1.Qe1?
      • threat
        • 2.Qxb4#
      • 1...Sxc6
        • 2.Sxc6#
      • 1...axb5
        • 2.Ra7#
      • 1...Sc2
        • 2.Sb3#
      • 1...Sb3
        • 2.Sxb3#
      • 1...bxc5!
  • Keys
    • 1.a3!
      • threat
        • 2.axb4#
      • 1...Sxc6
        • 2.Sxc6#
      • 1...bxa3
        • 2.Qe1#
      • 1...axb5
        • 2.Ra7#
      • 1...bxc5
        • 2.Bc7#
      • 1...Sc2
        • 2.Sb3#
      • 1...Sb3
        • 2.Sxb3#
      • 1...b3
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(E)
    • S(a);N_GUARD::S(E),XS(a)
    • S(g);XP(I)::S(E),XS(g)
    • P(c);OGATEB::QAB(H)
    • P(e);OGATEB,XB(F)::R(K)
    • P(f);OGATEB,XP(G)::B(J)
  • Tries
    • Try
      • B(J);P_PINP(f)
      • Threat
        • B(J),XP(f)
      • Vars
        • P(c);OGATEB::QAB(H)
      • Refutation
        • P(e);XB(F)
    • Try
      • Q(H);P_PINP(c)
      • Threat
        • QAB1(H),XP(c)
      • Vars
        • S(g);XP(I)::S(E),XS(g)
        • P(e);OGATEB,XB(F)::R(K)
        • S(a);N_GUARD::S(E)
        • S(a);N_GUARD::S(E),XS(a)
      • Refutation
        • P(f);XP(G)
  • Actual
    • P(B);
    • Threat
      • P(B),XP(c)
    • Vars
      • S(g);XP(I)::S(E),XS(g)
      • P(c);OGATEB,XP(B)::QAB(H)
      • P(e);OGATEB,XB(F)::R(K)
      • P(f);OGATEB,XP(G)::B(J)
      • S(a);N_GUARD::S(E)
      • S(a);N_GUARD::S(E),XS(a)
      • P(c);OGATEB::QAB(H)
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