MESON Chess Problem Database

Problem Display
PID: 21705 (8/1p6/1K6/3p2N1/2pk1P2/Q7/2P1P3/3n4 w - - 0 1)

Seilberger, Johann Joseph Petrus Adrianus

2nd HM., Good Companions (February), 1920

8/1p6/1K6/3p2N1/2pk1P2/Q7/2P1P3/3n4

#2

6 + 5

3132 The Good Companion Two-Mover 1922
1577 Jaarboek 1933
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.e3#
    • 1...Sf2
      • 2.e3#
    • 1...Sc3
      • 2.Qc5#
    • 1...Se3
      • 2.c3#
    • 1...c3
      • 2.Qc5#
  • Tries
    • 1.Kxb7?
      • 1...Sc3
        • 2.Qa7#
      • 1...Sb2
        • 2.e3#
      • 1...Sf2
        • 2.e3#
      • 1...Se3
        • 2.c3#
      • 1...c3!
    • 1.Qe7?
      • threat
        • 2.Qe5#
      • 1...c3
        • 2.Qc5#
      • 1...Kc3!
    • 1.Qf3?
      • threat
        • 2.Se6#
      • 1...c3
        • 2.Qd3#
      • 1...Se3!
    • 1.Qg3?
      • 1...c3
        • 2.Qd3#
      • 1...Sb2
        • 2.c3#
      • 1...Sf2
        • 2.c3#
      • 1...Sc3
        • 2.Qf2#
        • 2.Qg1#
        • 2.e3#
      • 1...Se3!
    • 1.c3+?
      • 1...Sxc3
        • 2.Qc5#
      • 1...Ke3!
  • Keys
    • 1.Qh3!
      • 1...Se3
        • 2.Qh8#
      • 1...c3
        • 2.Qd3#
      • 1...Sb2
        • 2.c3#
      • 1...Sf2
        • 2.c3#
      • 1...Sc3
        • 2.e3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 5
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::P(B)
    • S(a);SBLOCK::QAB1(C)
    • S(a);N_GUARD,SBLOCK::P(A)
    • P(b);::QAB1(C)
  • Tries
    • Try
      • K(F);P-FLIGHT,XP(e)
      • Vars
        • S(a);SBLOCK::QAB(C)
        • S(a);N_GUARD::P(B)
        • S(a);N_GUARD,SBLOCK::P(A)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(b);::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • S(E)
      • Vars
        • P(b);N_GUARD::QAR1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Vars
        • P(b);N_GUARD::QAR1(C)
        • S(a);N_GUARD::P(A)
      • Refutation
        • S(a);
    • Try
      • P(A);CHECK
      • Vars
        • S(a);SBLOCK,XP(A)::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • S(a);SBLOCK::QAB(C)
      • P(b);N_GUARD::QAR1(C)
      • S(a);N_GUARD::P(A)
      • S(a);N_GUARD,SBLOCK::P(B)
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