MESON Chess Problem Database

Problem Display
PID: 145570 (1K2BbN1/R3p2r/4k2p/3p2R1/1p3B1n/r3N3/4b3/2n2Q2 w - - 0 1)

Ellerman, Arnoldo

2nd HM., Good Companions (October), 1917

1K2BbN1/R3p2r/4k2p/3p2R1/1p3B1n/r3N3/4b3/2n2Q2

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Ra6#
    • 1...Rf7
      • 2.Bd7#
    • 1...Bg7
      • 2.Rxe7#
    • 1...Sg2
      • 2.Rg6#
    • 1...Sf3
      • 2.Rg6#
      • 2.Qh3#
    • 1...Sf5
      • 2.Rg6#
    • 1...Sg6
      • 2.Rxg6#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Sd4#
      • 1...Sxf5
        • 2.Rg6#
      • 1...d4
        • 2.Sxd4#
      • 1...Rd3
        • 2.Ra6#
      • 1...Bg7
        • 2.Rxe7#
      • 1...Sb3
        • 2.Qxe2#
      • 1...Sf3!
    • 1.Qh3+?
      • 1...Sf5
        • 2.Rg6#
        • 2.Qxf5#
      • 1...Bg4!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Sd4#
      • 1...Rd3
        • 2.Ra6#
      • 1...Bg7
        • 2.Rxe7#
      • 1...Sb3
        • 2.Qxe2#
      • 1...Sf3
        • 2.Qh3#
      • 1...Sf5
        • 2.Rg6#
      • 1...d4
        • 2.Sxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD,S_CUTB(b)::R(E)
    • R(j);SBLOCK::B(G)
    • B(k);N_GUARD,S_CUTR(j)::R1(E),XP(i)
    • S(e);N_GUARD::R(D)
    • S(e);N_GUARD::R(D),XS(e)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • S(e);N_GUARD,SBLOCK,XS(B)::R(D)
        • P(f);::S(B),XP(f)
        • R(c);N_GUARD,S_CUTB(b)::R(E)
        • B(k);N_GUARD,S_CUTR(j)::R1(E),XP(i)
        • S(a);N_GUARD,S_CUTR(c)::QAR(A),XB(b)
      • Refutation
        • S(e);
    • Try
      • Q(A);CHECK
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • R(c);N_GUARD,S_CUTB(b)::R(E)
      • B(k);N_GUARD,S_CUTR(j)::R1(E),XP(i)
      • S(a);N_GUARD,S_CUTR(c)::QAR(A),XB(b)
      • S(e);N_GUARD,S_CUTB(b),S_CUTR(c)::QAB(A)
      • S(e);N_GUARD,SBLOCK::R(D)
      • P(f);::S(B),XP(f)
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Developed and maintained by Brian Stephenson.
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