MESON Chess Problem Database

Problem Display
PID: 21181 (1Q4bB/6N1/3Np1P1/1R3Pp1/2K2krp/5B2/7b/5R2 w - - 0 1)

Ellerman, Arnoldo

4th HM., Good Companions (January), 1917

1Q4bB/6N1/3Np1P1/1R3Pp1/2K2krp/5B2/7b/5R2

#2

10 + 7

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Tries
    • 1.Se4+?
      • 1...Ke3
        • 2.Rb3#
      • 1...e5+!
    • 1.Sf7+?
      • 1...e5
        • 2.Qxe5#
      • 1...Ke3+!
    • 1.Be4+?
      • 1...Kg3
        • 2.Rb3#
      • 1...Ke3!
  • Keys
    • 1.Rb3!
      • threat
        • 2.Sh5#
      • 1...Kg3+
        • 2.Be4#
      • 1...Ke5+
        • 2.Se4#
      • 1...exf5+
        • 2.Sf7#
      • 1...e5+
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);P_PINS(F),S_FLIGHT::R(D)
      • Refutation
        • P(f);CHECK,P_SPINP(f)
    • Try
      • S(F);CHECK
      • Vars
        • P(f);P_PINS(F),P_SPINP(f)::QAB1(I),XP(f)
      • Refutation
        • K(b);CHECK,S_FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • K(b);P_PINB(B),S_FLIGHT::R(D)
      • Refutation
        • K(b);P_PINB(B),S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • S(H)
    • Vars
      • K(b);CHECK,S_FLIGHT::R(D)+B(B)
      • K(b);CHECK,S_FLIGHT::QAB(I)+S(F)
      • P(f);CHECK,N_GUARD,XP(E)::QAB(I)+S(F)
      • P(f);CHECK,SBLOCK::R(A)+B(B)
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