MESON Chess Problem Database

Problem Display
PID: 21686 (5b1K/6n1/R6p/2N1k3/2Pp1p1r/3B3q/3RP3/6Q1 w - - 0 1)

Bettmann, Edgar

Good Companions (March), 1920

5b1K/6n1/R6p/2N1k3/2Pp1p1r/3B3q/3RP3/6Q1

#2

8 + 8

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Sd7#
    • 1...Qg2
      • 2.Sd7#
    • 1...Qd7
      • 2.Sxd7#
    • 1...Qh1
      • 2.Sd7#
    • 1...Qh2
      • 2.Sd7#
    • 1...Qe3
      • 2.Sd7#
    • 1...Qf3
      • 2.Sd7#
    • 1...Qg3
      • 2.Sd7#
    • 1...Rg4
      • 2.Sd7#
    • 1...Bxc5
      • 2.Qxg7#
    • 1...Bd6
      • 2.Qxg7#
    • 1...Sf5
      • 2.Sd7#
      • 2.Re6#
    • 1...Se6
      • 2.Sd7#
  • Tries
    • 1.Bg6?
      • threat
        • 2.Qxd4#
      • 1...Se6
        • 2.Sd7#
      • 1...f3
        • 2.Sd3#
      • 1...Qd7
        • 2.Sd3#
        • 2.Sxd7#
      • 1...Qc3
        • 2.Sd7#
      • 1...Qd3
        • 2.Sxd3#
        • 2.Sd7#
      • 1...Qe3
        • 2.Sd7#
      • 1...Sf5
        • 2.Re6#
      • 1...d3
        • 2.Qa1#
      • 1...Bxc5!
    • 1.Qg5+?
      • 1...Qf5
        • 2.Sd7#
      • 1...Sf5
        • 2.Sd7#
        • 2.Re6#
        • 2.Qf6#
      • 1...hxg5+!
  • Keys
    • 1.Bh7!
      • threat
        • 2.Qxd4#
      • 1...Bxc5
        • 2.Qxg7#
      • 1...Se6
        • 2.Sd7#
      • 1...f3
        • 2.Sd3#
      • 1...Qd7
        • 2.Sd3#
        • 2.Sxd7#
      • 1...Qc3
        • 2.Sd7#
      • 1...Qd3
        • 2.Sxd3#
        • 2.Sd7#
      • 1...Qe3
        • 2.Sd7#
      • 1...Sf5
        • 2.Re6#
      • 1...d3
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(a);N_GUARD::S(F)
    • Q(a);N_GUARD::S(F),XQ(a)
    • R(d);S_CUTQ(a)::S(F)
    • B(h);N_GUARD,XS(F)::QAB(A),XS(g)
    • B(h);N_GUARD::QAB(A),XS(g)
    • S(g);S_CUTQ(a)::S(F)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAB1(A),XP(b)
      • Vars
        • S(g);S_CUTQ(a)::S(F)
        • P(c);S_CUTQ(a)::S(F)
        • Q(a);N_GUARD::S(F)
        • S(g);N_GUARD,S_CUTQ(a)::R1(G)
        • P(b);OGATEB::QAB(A)
      • Refutation
        • B(h);XS(F)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::S(F)
      • Refutation
        • P(f);CHECK,XQ(A)
  • Actual
    • B(D);
    • Threat
      • QAB1(A),XP(b)
    • Vars
      • B(h);N_GUARD,XS(F)::QAB(A),XS(g)
      • S(g);S_CUTQ(a)::S(F)
      • P(c);S_CUTQ(a)::S(F)
      • Q(a);N_GUARD::S(F)
      • S(g);N_GUARD,S_CUTQ(a)::R1(G)
      • P(b);OGATEB::QAB(A)
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