MESON Chess Problem Database

Problem Display
PID: 60830 (k5K1/3R4/3p4/8/2p5/1R4Q1/3b2r1/r2b3B w - - 0 1)

Ellerman, Arnoldo

3rd Prize, Good Companions (October Meredith Ty.), 1920

k5K1/3R4/3p4/8/2p5/1R4Q1/3b2r1/r2b3B

#2

5 + 7

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Rd8#
    • 1...d5
      • 2.Rb8#
  • Tries
    • 1.Bxg2+?
      • 1...d5
        • 2.Bxd5#
        • 2.Rb8#
        • 2.Qb8#
      • 1...Bf3!
    • 1.Qxg2+?
      • 1...d5
        • 2.Qxd5#
      • 1...Bf3!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Rd8#
      • 1...Bg4
        • 2.Qf8#
      • 1...Ba5
        • 2.Ra7#
      • 1...Bg5
        • 2.Qxa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(a);SBLOCK::R(D)
    • P(f);N_SPINR(d)::R1(B)
  • Tries
    • Try
      • B(A);CHECK,N_SPINQ(C),XR(d)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(C);CHECK,N_SPINQ(C),XR(d)
      • Vars
        • P(f);P_SPINP(f)::QAB(C),XP(f)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • Q(C);
    • Threat
      • R(D)
    • Vars
      • B(b);N_PINQ(C)::QAR(C)
      • B(c);S_CUTR(a)::R1(D)
      • B(c);N_PINQ(C)::QAB(C),XR(a)
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