MESON Chess Problem Database

Problem Display
PID: 21008 (B1N5/4p3/2n1r3/R1Bk4/4p2R/8/8/4K2Q w - - 0 1)

Ellerman, Arnoldo

1st Prize, Good Companions (January Meredith Ty.), 1916

B1N5/4p3/2n1r3/R1Bk4/4p2R/8/8/4K2Q

#2

7 + 5

3132 The Good Companion Two-Mover 1922
5501 Chess Cameos 1936
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Qxe4#
    • 1...Rf6
      • 2.Qxe4#
    • 1...Rg6
      • 2.Qxe4#
    • 1...Rh6
      • 2.Qxe4#
  • Tries
    • 1.Qg2?
      • 1...Ke5
        • 2.Qg5#
      • 1...Rd6
        • 2.Qxe4#
      • 1...Rf6
        • 2.Qxe4#
      • 1...Rg6
        • 2.Qxe4#
      • 1...Rh6
        • 2.Qxe4#
      • 1...Re5
        • 2.Qa2#
      • 1...Kc4!
  • Keys
    • 1.Qf3!
      • 1...exf3+
        • 2.Be3#
      • 1...Kc4
        • 2.Sb6#
      • 1...Ke5
        • 2.Rh5#
      • 1...Rd6
        • 2.Qxe4#
      • 1...Rf6
        • 2.Qxe4#
      • 1...Rg6
        • 2.Qxe4#
      • 1...Rh6
        • 2.Qxe4#
      • 1...Re5
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(d);N_GUARD::QAB1(B),XP(a)
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(b);N_SPINP(a),N_SPINS(c),P-FLIGHT::QAR2(B)
        • R(d);N_GUARD::QAB1(B),XP(a)
        • R(d);SBLOCK::QAB(B)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • P(a);CHECK,N_SPINP(a),XQ(B)::R(D)+B(E)
      • K(b);N_SPINS(c),S_FLIGHT::S(G)
      • K(b);N_SPINP(a),N_SPINS(c),P-FLIGHT::R(C)
      • R(d);N_GUARD::QAB1(B),XP(a)
      • R(d);SBLOCK::QAB(B)
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