MESON Chess Problem Database

Problem Display
PID: 83633 (2K1R1R1/b1p5/r1Qp1N2/3pPkPB/q7/1P3nPb/1Bn3N1/5r2 w - - 0 1)

Ellerman, Arnoldo

Western Morning News, 1934

2K1R1R1/b1p5/r1Qp1N2/3pPkPB/q7/1P3nPb/1Bn3N1/5r2

#2

12 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb3
      • 2.Qd7#
    • 1...Qa1
      • 2.Qd7#
      • 2.Qxc2#
    • 1...Qa2
      • 2.Qd7#
      • 2.Qxc2#
    • 1...Qa3
      • 2.Qd7#
      • 2.Qxc2#
    • 1...Qb4
      • 2.Qd7#
    • 1...Qc4
      • 2.Qd7#
    • 1...Qd4
      • 2.Qd7#
    • 1...Qe4
      • 2.Qd7#
    • 1...Qf4
      • 2.Qd7#
    • 1...Qg4
      • 2.Qd7#
    • 1...Qh4
      • 2.Qd7#
    • 1...Qa5
      • 2.Qd7#
      • 2.Qxc2#
    • 1...Bd4
      • 2.Qxc2#
    • 1...Scd4
      • 2.Se3#
    • 1...Sfd4
      • 2.Sh4#
    • 1...Sxg5
      • 2.Bg6#
    • 1...d4
      • 2.Qe4#
  • Tries
    • 1.Sh4+?
      • 1...Qxh4
        • 2.Qd7#
      • 1...Sxh4!
    • 1.Bg4+?
      • 1...Qxg4
        • 2.Qd7#
      • 1...Bxg4!
    • 1.g4+?
      • 1...Qxg4
        • 2.Qd7#
      • 1...Bxg4!
  • Keys
    • 1.Bf7!
      • threat
        • 2.Be6#
      • 1...Sxg5
        • 2.Bg6#
      • 1...Qd4
        • 2.Qd7#
      • 1...Bd4
        • 2.Qxc2#
      • 1...Scd4
        • 2.Se3#
      • 1...Sfd4
        • 2.Sh4#
      • 1...d4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • Q(e);N_GUARD,XP(C)::QAB(H)
    • Q(e);N_GUARD::QAB(H)
    • B(j);S_CUTQ(e)::QAB(H),XS(b)
    • S(b);N_GUARD,S_CUTB(j)::S(B)
    • S(c);N_GUARD,S_CUTQ(e)::S(B)
    • S(c);SBLOCK,XP(F)::B(G)
    • P(f);OGATE::QAB1(H)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • Q(e);XS(B)::QAB(H)
      • Refutation
        • S(c);XS(B)
    • Try
      • B(G);CHECK
      • Vars
        • Q(e);XB(G)::QAB(H)
      • Refutation
        • B(d);XB(G)
    • Try
      • P(D);CHECK
      • Vars
        • Q(e);XP(D)::QAB(H)
      • Refutation
        • B(d);XP(D)
  • Actual
    • B(G);
    • Threat
      • B(G)
    • Vars
      • S(c);SBLOCK,XP(F)::B(G)
      • Q(e);N_GUARD::QAB(H)
      • B(j);S_CUTQ(e)::QAB(H),XS(b)
      • S(b);N_GUARD,S_CUTB(j)::S(B)
      • S(c);N_GUARD,S_CUTQ(e)::S(B)
      • P(f);OGATE::QAB1(H)
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