MESON Chess Problem Database

Problem Display
PID: 21499 (8/2QR1pp1/1B1K1b2/1p2p2r/8/3k2N1/n1R2P2/1b6 w - - 0 1)

Ellerman, Arnoldo

1st HM.=, Good Companions (February), 1919

8/2QR1pp1/1B1K1b2/1p2p2r/8/3k2N1/n1R2P2/1b6

#2

7 + 9

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5
      • 2.Kxe5#
    • 1...Be7+
      • 2.Kxe7#
    • 1...Sc1
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sb4
      • 2.Qc3#
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Be3?
      • threat
        • 2.Rd2#
      • 1...Be7+
        • 2.Kxe7#
      • 1...Bxc2!
    • 1.Qc6?
      • threat
        • 2.Kc7#
        • 2.Qe4#
      • 1...Be7+
        • 2.Kxe7#
      • 1...Bxc2
        • 2.Kc7#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Bd8
        • 2.Qe4#
      • 1...Sb4
        • 2.Qe4#
        • 2.Qc3#
      • 1...e4
        • 2.Qxe4#
      • 1...Rh4!
  • Keys
    • 1.Ba5!
      • threat
        • 2.Rd2#
      • 1...Be7+
        • 2.Kxe7#
      • 1...Kd4
        • 2.Kc6#
      • 1...Bxc2
        • 2.Kc5#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Bg5
        • 2.Kxe5#
      • 1...Sb4
        • 2.Qc3#
      • 1...b4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(g);::R(G)+K(E),XP(e)
    • B(g);CHECK::R(G)+K(E),XB(g)
    • S(b);N_GUARD::QAR1(F)
    • S(b);N_GUARD::QAR1(F),XS(b)
    • P(d);N_GUARD::QAB1(F)
  • Tries
    • Try
      • B(D);
      • Threat
        • R1(A)
      • Vars
        • B(g);CHECK::R(G)+K(E),XB(g)
      • Refutation
        • B(a);XR(A)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);CHECK::R(G)+K(E),XB(g)
        • B(a);XR(A)::R(G)+K(E)
        • S(b);N_GUARD::QAR1(F),XS(b)
        • B(g);::QAB1(F)
        • P(e);::QAB1(F),XP(e)
      • Refutation
        • R(f);
  • Actual
    • B(D);
    • Threat
      • R1(A)
    • Vars
      • B(g);CHECK::R(G)+K(E),XB(g)
      • K(c);P-FLIGHT::R(G)+K(E)
      • B(a);SBLOCK,XR(A)::R(G)+K(E)
      • S(b);N_GUARD::QAR1(F),XS(b)
      • B(g);::R(G)+K(E),XP(e)
      • S(b);N_GUARD::QAR1(F)
      • P(d);N_GUARD::QAB1(F)
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