MESON Chess Problem Database

Problem Display
PID: 21332 (1n6/B1prNr1p/4Q3/2q1b2K/2PkBP1R/2p1R3/5P2/8 w - - 0 1)

Ellerman, Arnoldo

1st HM., Good Companions (January black Bishop), 1918

1n6/B1prNr1p/4Q3/2q1b2K/2PkBP1R/2p1R3/5P2/8

#2

10 + 9

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qxd5#
    • 1...Rdxe7
      • 2.Qd5#
    • 1...Rf5+
      • 2.Sxf5#
    • 1...Rg7
      • 2.Sf5#
    • 1...Bd6+
      • 2.Qd5#
    • 1...Bf6+
      • 2.Sf5#
    • 1...Sa6
      • 2.Sc6#
    • 1...Sc6
      • 2.Sxc6#
  • Keys
    • 1.Bd3!
      • threat
        • 2.Qxe5#
      • 1...Rf5+
        • 2.Sxf5#
      • 1...Bxf4+
        • 2.Qe5#
      • 1...Bd6+
        • 2.Qd5#
      • 1...Bf6+
        • 2.Sf5#
      • 1...Bg7+
        • 2.f5#
      • 1...Bh8+
        • 2.f5#
      • 1...Rdxe7
        • 2.Qd5#
      • 1...Rfxe7
        • 2.fxe5#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Sc6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD::QAR1(H),XR(f)
    • R(f);N_GUARD,XS(J)::QAR1(H)
    • R(g);CHECK,N_GUARD::S(J),XR(g)
    • R(g);N_GUARD::S(J)
    • B(d);CHECK,S_CUTR(f)::QAR1(H)
    • B(d);CHECK,S_CUTR(g)::S(J)
    • S(i);N_GUARD::S(J)
    • S(i);N_GUARD::S(J),XS(i)
  • Actual
    • B(D);
    • Threat
      • QAB1(H),XB(d)
    • Vars
      • R(g);CHECK,N_GUARD::S(J),XR(g)
      • B(d);CHECK,P_SPINB(d),XP(E)::QAB1(H)
      • B(d);CHECK,S_CUTR(f)::QAR1(H)
      • B(d);CHECK,S_CUTR(g)::S(J)
      • B(d);CHECK,N_GUARD::R(F)+P(E)
      • R(f);N_GUARD,XS(J)::QAR1(H)
      • R(g);N_GUARD,XS(J)::R(F)+P(E),XB(d)
      • R(f);N_GUARD::QAR1(H),XR(f)
      • S(i);N_GUARD::S(J),XS(i)
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