MESON Chess Problem Database

Problem Display
PID: 64032 (8/b2N4/2pp4/R1n1p3/p1k1p3/PrB1K3/B1R1N3/3Q4 w - - 0 1)

Ellerman, Arnoldo

3rd HM., Good Companions (April), 1916

8/b2N4/2pp4/R1n1p3/p1k1p3/PrB1K3/B1R1N3/3Q4

#2

9 + 9

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Bb6
      • 2.Sxb6#
    • 1...Bb8
      • 2.Sb6#
    • 1...Sd3+
      • 2.Bd4#
    • 1...d5
      • 2.Sxe5#
  • Tries
    • 1.Sd4?
      • 1...exd4+
        • 2.Qxd4#
      • 1...Sxd7
        • 2.Qe2#
        • 2.Qf1#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Bb8
        • 2.Sb6#
      • 1...Sd3
        • 2.Ba1#
        • 2.Be1#
        • 2.Bb2#
        • 2.Bd2#
        • 2.Bb4#
      • 1...Sa6
        • 2.Qe2#
        • 2.Qf1#
      • 1...Se6
        • 2.Qe2#
        • 2.Qf1#
      • 1...Sb7
        • 2.Qe2#
        • 2.Qf1#
      • 1...d5
        • 2.Sxe5#
      • 1...Kd5!
    • 1.Qd3+?
      • 1...Sxd3+
        • 2.Bd4#
      • 1...exd3!
  • Keys
    • 1.Qf1!
      • 1...Sd3+
        • 2.Bd4#
      • 1...Sa6+
        • 2.Sd4#
      • 1...Se6+
        • 2.Sd4#
      • 1...Sb7+
        • 2.Sd4#
      • 1...Sxd7+
        • 2.Sd4#
      • 1...Kd5
        • 2.Qf7#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Bb8
        • 2.Sb6#
      • 1...d5
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(i);N_GUARD::S(I),XB(i)
    • B(i);N_GUARD::S(I)
    • S(e);CHECK,N_PINB(F)::R(C)+B(F)
    • P(h);N_GUARD::S(I),XP(f)
  • Tries
    • Try
      • S(D);
      • Vars
        • P(f);CHECK,OGATE,XS(D)::QAR1(A),XP(f)
        • B(i);N_GUARD::S(I),XB(i)
        • B(i);N_GUARD::S(I)
        • P(h);N_GUARD,SBLOCK::S(I),XP(f)
      • Refutation
        • K(c);P_SPINS(e),S_FLIGHT
    • Try
      • Q(A);CHECK,N_SPINB(F)
      • Vars
        • S(e);CHECK,XQ(A)::R(C)+B(F)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • S(e);CHECK,N_PINB(F)::R(C)+B(F)
      • S(e);CHECK,N_GUARD::QAB(A)+S(D)
      • S(e);CHECK,N_GUARD,XS(I)::QAB(A)+S(D)
      • K(c);P_SPINS(e),S_FLIGHT::QAB(A)
      • B(i);N_GUARD::S(I),XB(i)
      • B(i);N_GUARD::S(I)
      • P(h);N_GUARD,SBLOCK::S(I),XP(f)
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