MESON Chess Problem Database

Problem Display
PID: 20940 (K5B1/4p3/5pn1/R2p1krp/6n1/8/2pN1pNb/Q7 w - - 0 1)

Ellerman, Arnoldo

Good Companions (July), 1917

K5B1/4p3/5pn1/R2p1krp/6n1/8/2pN1pNb/Q7

#2

6 + 11

3132 The Good Companion Two-Mover 1922
887 Mate in Two Moves 1931
14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Sh4#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qe4#
      • 1...S6e5
        • 2.Sh4#
      • 1...Be5
        • 2.Qd3#
      • 1...S4e5
        • 2.Se3#
      • 1...e5!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Rxd5#
      • 1...Be5
        • 2.Qxc2#
      • 1...S4e5
        • 2.Se3#
      • 1...S6e5
        • 2.Sh4#
      • 1...e5
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(j);N_GUARD,SBLOCK::S(C)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(j);N_GUARD,N_SPINP(e)::S(C)
        • B(c);N_SPINP(e),SBLOCK::QAB(A)
        • S(d);N_GUARD,N_SPINP(e)::S(C)
      • Refutation
        • P(k);N_SPINP(e)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(f);P-FLIGHT::R1(D),XP(e)
      • B(c);N_SPINP(e),SBLOCK::QAB(A),XP(a)
      • S(d);N_GUARD,N_SPINP(e),SBLOCK::S(C)
      • S(j);N_GUARD,N_SPINP(e),SBLOCK::S(C)
      • P(k);N_GUARD,N_SPINP(e),SBLOCK::QAB(A)
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