MESON Chess Problem Database

Problem Display
PID: 64410 (3br1B1/pN1N1n2/2p4r/2Bn1p2/Ppk2p2/4p2p/b1PP3K/7Q w - - 0 1)

Ellerman, Arnoldo

Good Companions (December), 1918

3br1B1/pN1N1n2/2p4r/2Bn1p2/Ppk2p2/4p2p/b1PP3K/7Q

#2

9 + 14

3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Bh4
      • 2.Sa5#
    • 1...Ba5
      • 2.Sxa5#
    • 1...Bg5
      • 2.Sa5#
    • 1...Bf6
      • 2.Sa5#
    • 1...Be7
      • 2.Sa5#
    • 1...Sc3
      • 2.d3#
    • 1...Sb6
      • 2.Sa5#
    • 1...Sf6
      • 2.Sd6#
    • 1...Sc7
      • 2.Sa5#
    • 1...Se7
      • 2.Se5#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qd4#
        • 2.d3#
      • 1...exd2
        • 2.Qd4#
      • 1...Sb6
        • 2.Qd4#
      • 1...Sf6
        • 2.Qd4#
      • 1...Sc7
        • 2.Qd4#
      • 1...Se7
        • 2.Qd4#
      • 1...Re4
        • 2.d3#
      • 1...Bf6
        • 2.Sa5#
        • 2.d3#
      • 1...Se5
        • 2.Qd4#
      • 1...Sc3!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qe2#
      • 1...exd2
        • 2.Qd3#
      • 1...Sc3
        • 2.d3#
      • 1...Sb6
        • 2.Sa5#
      • 1...Sf6
        • 2.Sd6#
      • 1...Sc7
        • 2.Sa5#
      • 1...Se7
        • 2.Se5#
      • 1...Se5
        • 2.Qxf4#
      • 1...e2
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • B(m);N_GUARD::S(G)
    • B(m);N_GUARD::S(G),XB(m)
    • S(g);P_SPINS(l),SBLOCK::P(C)
    • S(g);P_SPINS(l),S_CUTB(m)::S(G)
    • S(g);P_SPINS(l),S_CUTR(j)::S(G)
    • S(g);P_SPINS(l),S_CUTR(n)::S(H)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);XP(C)::QAR1(A)
        • S(g);P_SPINS(l)::QAR1(A)
        • R(n);::P(C)
        • S(l);P_SPINS(g)::QAR1(A)
      • Refutation
        • S(g);P_SPINS(l)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • P(b);OGATE,XP(C)::QAB1(A)
      • S(g);P_SPINS(l),SBLOCK::P(C)
      • S(g);P_SPINS(l),S_CUTB(m)::S(G)
      • S(g);P_SPINS(l),S_CUTR(j)::S(G)
      • S(g);P_SPINS(l),S_CUTR(n)::S(H)
      • S(l);P_SPINS(g),S_CUTR(n)::QAR(A),XP(f)
      • P(b);OGATE::QAB1(A)
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