MESON Chess Problem Database

Problem Display
PID: 21512 (8/4QN2/Bnp2pK1/1r1k1p2/1P3P2/1pqNp3/1B6/3R4 w - - 0 1)

Ellerman, Arnoldo

Good Companions (March), 1919

8/4QN2/Bnp2pK1/1r1k1p2/1P3P2/1pqNp3/1B6/3R4

#2

9 + 9

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qc5#
    • 1...Qxb2
      • 2.Sxb2#
    • 1...Rxb4
      • 2.Sxb4#
  • Tries
    • 1.Sc5+?
      • 1...Qd2
        • 2.Qe6#
      • 1...Qd4
        • 2.Rxd4#
        • 2.Qe6#
      • 1...Qd3
        • 2.Qe6#
      • 1...Kc4!
    • 1.Qd6+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4!
    • 1.Qe6+?
      • 1...Kd4
        • 2.Sc1#
        • 2.Se1#
        • 2.Sf2#
        • 2.Sc5#
      • 1...Kxe6!
  • Keys
    • 1.Kxf5!
      • threat
        • 2.Qe4#
      • 1...Kc4+
        • 2.Qc5#
      • 1...Kd4+
        • 2.Sde5#
      • 1...Qe5+
        • 2.Sdxe5#
      • 1...Qxb4
        • 2.Qe6#
      • 1...Rxb4
        • 2.Sxb4#
        • 2.Qd6#
      • 1...Qd4
        • 2.Qe6#
      • 1...Qc4
        • 2.Qd6#
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(e);P_SPINR(d),S_FLIGHT::QAR1(H)
    • Q(b);XB(B)::R(A)+S(C),XQ(b)
    • R(d);XP(D)::R(A)+S(C),DCHECK,XR(d)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::QAB1(H)
      • Refutation
        • K(e);P_SPINR(d),S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);P_SPINR(d),S_FLIGHT::QAR1(H)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Refutation
        • K(e);S_FLIGHT,XQ(H)
  • Actual
    • K(G);S_FLIGHT,XP(f)
    • Threat
      • QAB1(H)
    • Vars
      • K(e);CHECK,P_SPINR(d),S_FLIGHT::QAR1(H)
      • K(e);CHECK,P-FLIGHT,P_SPINQ(b)::R(A)+S(C)
      • Q(b);CHECK,N_GUARD::R(A)+S(C),XQ(b)
      • Q(b);XP(D)::QAB1(H)
      • Q(b);::QAB1(H)
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