MESON Chess Problem Database

Problem Display
PID: 220353 (1n1bb3/QPkpq1R1/n5P1/2r1NN2/2R1PB2/3P1K1B/8/8 w - - 0 1)

Ellerman, Arnoldo

British Chess Magazine, 1925

1n1bb3/QPkpq1R1/n5P1/2r1NN2/2R1PB2/3P1K1B/8/8

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.b8Q#
  • Tries
    • 1.Sxd7+?
      • 1...Kc6
        • 2.Sd4#
      • 1...Qd6
        • 2.Qb6#
      • 1...Qe5
        • 2.Qb6#
      • 1...Kxd7!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sb5#
      • 1...Kd6
        • 2.Sf7#
      • 1...Qxe5
        • 2.Bxe5#
      • 1...Sc6
        • 2.b8Q#
      • 1...d5
        • 2.Sec6#
      • 1...d6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(f);N_SPINR(a),OGATE::P=Q
  • Tries
    • Try
      • S(G);CHECK,XP(d)
      • Vars
        • K(c);P-FLIGHT::S(H)
        • Q(e);P_SPINQ(e)::QAB1(J)
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT,P_SPINQ(e),XS(G)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(c);N_SPINR(a),S_FLIGHT::B(F)+S(G),DCHECK
      • Q(e);OGATE,P_SPINP(d),P_SPINQ(e),XS(G)::B(F),XQ(e)
      • S(f);N_SPINR(a),OGATE::P=Q
      • P(d);N_GUARD,P_SPINQ(e)::B(F)+S(G)
      • P(d);N_GUARD,P_SPINQ(e),SBLOCK::S(H)
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