MESON Chess Problem Database

Problem Display
PID: 65152 (8/2n5/r2p3B/p3N2K/3pkP2/2R1nN1Q/2PPqP2/4R2B w - - 0 1)

Ellerman, Arnoldo

Good Companions (October), 1921

8/2n5/r2p3B/p3N2K/3pkP2/2R1nN1Q/2PPqP2/4R2B

#2

12 + 8

3132 The Good Companion Two-Mover 1922
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Sg1#
      • 2.Sh2#
      • 2.Sh4#
    • 1...Qxf3+
      • 2.Bxf3#
    • 1...Qc4
      • 2.Sg1#
      • 2.Sh2#
      • 2.Sh4#
    • 1...Qb5
      • 2.Sg1#
      • 2.Sh2#
      • 2.Sh4#
    • 1...Qxd2
      • 2.Sg1#
      • 2.Sxd2#
      • 2.Sh2#
      • 2.Sh4#
    • 1...Sg4
      • 2.Sh4#
    • 1...Sed5
      • 2.d3#
  • Tries
    • 1.d3+?
      • 1...Qxd3
        • 2.Sg1#
        • 2.Sd2#
        • 2.Sh2#
        • 2.Sh4#
      • 1...Kd5!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sf6#
      • 1...Qxf3+
        • 2.Bxf3#
      • 1...Qb5+
        • 2.Sfe5#
      • 1...Kd5
        • 2.Sf6#
      • 1...Sg4
        • 2.Sh4#
      • 1...Sed5
        • 2.d3#
      • 1...Scd5
        • 2.Qe6#
      • 1...Se8
        • 2.Qe6#
      • 1...d5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,OGATE,P_SPINQ(a),P_SPINS(b),XS(G)::B(B),XQ(a)
    • S(b);N_PINS(G),P_SPINQ(a)::B(B)+S(G)
    • S(b);P_SPINQ(a),SBLOCK::P(D)
  • Tries
    • Try
      • P(D);CHECK
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),P_SPINS(b),XS(G)::B(B),XQ(a)
      • Q(a);CHECK,N_PINS(G),P_SPINS(b)::B(B)+S(G)
      • K(d);S_FLIGHT::S(J)
      • S(b);N_PINS(G),P_SPINQ(a)::B(B)+S(G)
      • S(b);P_SPINQ(a),SBLOCK::P(D)
      • S(h);N_GUARD::QAR2(H)
      • P(g);N_GUARD,SBLOCK::S(J)
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