MESON Chess Problem Database

Problem Display
PID: 65056 (3Q4/2N3p1/2r1b3/1p2p2r/R1nn1k2/7P/3pR2P/BB4NK w - - 0 1)

Ellerman, Arnoldo

2nd Prize, Good Companions (December), 1921

3Q4/2N3p1/2r1b3/1p2p2r/R1nn1k2/7P/3pR2P/BB4NK

#2

10 + 10

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

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Re4#
      • 2.Qh4#
    • 1...Bg4
      • 2.Sd5#
    • 1...Bd5+
      • 2.Sxd5#
    • 1...Bf5
      • 2.Sd5#
    • 1...Bd7
      • 2.Sd5#
    • 1...Bc8
      • 2.Sd5#
    • 1...Se3
      • 2.Rf2#
    • 1...Sd6
      • 2.Sxe6#
    • 1...Sxe2
      • 2.Qxd2#
    • 1...Sf5
      • 2.Bxe5#
      • 2.Re4#
  • Tries
    • 1.Sxe6+?
      • 1...Sxe6
        • 2.Qxd2#
      • 1...Rxe6!
    • 1.Rf2+?
      • 1...Sf3
        • 2.Rxf3#
        • 2.Qxd2#
      • 1...Ke3!
    • 1.Qh4+?
      • 1...Bg4
        • 2.Sd5#
        • 2.Qxg4#
      • 1...Rxh4!
    • 1.Qf6+?
      • 1...Rf5
        • 2.Re4#
        • 2.Qh4#
      • 1...Bf5
        • 2.Sd5#
        • 2.Re4#
      • 1...Sf5
        • 2.Bxe5#
        • 2.Re4#
      • 1...gxf6!
  • Keys
    • 1.Bg6!
      • threat
        • 2.Re4#
      • 1...Bd5+
        • 2.Sxd5#
      • 1...Sxe2
        • 2.Qxd2#
      • 1...e4
        • 2.Rxe4#
      • 1...Rf5
        • 2.Qh4#
      • 1...Bf5
        • 2.Sd5#
      • 1...Se3
        • 2.Rf2#
      • 1...Sd6
        • 2.Sxe6#
      • 1...Sf5
        • 2.Bxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(i);N_GUARD::S(I)
    • B(i);CHECK,N_GUARD::S(I),XB(i)
    • S(b);P_SPINS(c),SBLOCK::R(E)
    • S(b);P_SPINS(c),S_CUTR(h)::S(I),XB(i)
    • S(c);OGATE,P_SPINS(b),XR(E)::QAB(J),XP(a)
  • Tries
    • Try
      • S(I);CHECK,XB(i)
      • Vars
        • S(c);OGATE,P_SPINS(b),XS(I)::QAB(J),XP(a)
      • Refutation
        • R(h);XS(I)
    • Try
      • R(E);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(J);CHECK
      • Refutation
        • R(g);XQ(J)
    • Try
      • Q(J);CHECK
      • Refutation
        • P(j);XQ(J)
  • Actual
    • B(B);
    • Threat
      • R1(E)
    • Vars
      • B(i);CHECK,N_GUARD::S(I),XB(i)
      • S(c);OGATE,P_SPINS(b),XR(E)::QAB(J),XP(a)
      • P(f);::R1(E),XP(f)
      • R(g);N_GUARD,S_CUTB(i)::QAR2(J)
      • B(i);N_GUARD::S(I)
      • S(b);P_SPINS(c),SBLOCK::R(E)
      • S(b);P_SPINS(c),S_CUTR(h)::S(I),XB(i)
      • S(c);OGATE,P_SPINS(b)::B(A),XP(f)
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