MESON Chess Problem Database

Problem Display
PID: 83524 (2n1N3/3pp1N1/8/4k3/6R1/1Q3p1n/8/b4K2 w - - 0 1)

Ellerman, Arnoldo

Good Companions, 1919

2n1N3/3pp1N1/8/4k3/6R1/1Q3p1n/8/b4K2

#2

5 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qe3#
    • 1...d6
      • 2.Qe6#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Re4#
        • 2.Qe4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sf2
        • 2.Rg5#
      • 1...Sf4
        • 2.Rg5#
      • 1...Sg5
        • 2.Rxg5#
      • 1...Sd6
        • 2.Qc5#
      • 1...d5!
    • 1.Qb2+?
      • 1...Kd5
        • 2.Qb5#
      • 1...Bxb2!
    • 1.Qd3?
      • threat
        • 2.Re4#
        • 2.Qe4#
        • 2.Qf5#
      • 1...Bd4
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qxd4#
      • 1...Sf2
        • 2.Qf5#
      • 1...Sf4
        • 2.Rg5#
      • 1...Sg5
        • 2.Qf5#
      • 1...d5
        • 2.Qf5#
        • 2.Qe3#
      • 1...e6
        • 2.Re4#
        • 2.Qe4#
      • 1...Sd6!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qe4#
      • 1...Kd5
        • 2.Qb5#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sf2
        • 2.Rg5#
      • 1...Sf4
        • 2.Rg5#
      • 1...Sg5
        • 2.Rxg5#
      • 1...Sd6
        • 2.Qc5#
      • 1...d5
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • P(e);SBLOCK::QAR2(B)
    • P(e);N_GUARD::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD::QAB1(B),XB(a)
        • S(c);N_GUARD::R(C)
        • S(c);N_GUARD::R(C),XS(c)
        • S(g);S_CUTP(e)::QAR2(B)
      • Refutation
        • P(e);
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR2(B)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(c);::QAR1(B)
        • S(c);N_GUARD,SBLOCK::R(C)
      • Refutation
        • S(g);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(d);P-FLIGHT::QAR2(B)
      • B(a);N_GUARD::QAB1(B),XB(a)
      • S(c);N_GUARD::R(C)
      • S(c);N_GUARD::R(C),XS(c)
      • S(g);S_CUTP(e)::QAR2(B)
      • P(e);SBLOCK::QAR(B)
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