MESON Chess Problem Database

Problem Display
PID: 96732 (Kb2b3/1n5Q/4PR2/3k1N2/3p4/1P1N1P2/2B5/8 w - - 0 1)

Stewart, John

Stubbs, Arthur Goodwin

The Chess Problem, 1944

Kb2b3/1n5Q/4PR2/3k1N2/3p4/1P1N1P2/2B5/8

#2

9 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qxb7#
    • 1...Bh5
      • 2.Qxb7#
    • 1...Bg6
      • 2.Qxb7#
    • 1...Sd6
      • 2.Se7#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Sb4#
        • 2.Sf4#
        • 2.Se7#
        • 2.Qc4#
      • 1...Bb5
        • 2.Sb4#
        • 2.Sf4#
        • 2.Se7#
      • 1...Bc6
        • 2.Se7#
      • 1...Sa5
        • 2.Sb4#
        • 2.Sf4#
        • 2.Se7#
        • 2.Qc5#
      • 1...Sc5
        • 2.Sb4#
        • 2.Sf4#
        • 2.Se7#
        • 2.Qxc5#
      • 1...Sd6
        • 2.Se7#
        • 2.Qc5#
      • 1...Bxc7!
    • 1.Qd7+?
      • 1...Bd6
        • 2.Se7#
      • 1...Sd6
        • 2.Se7#
      • 1...Bxd7!
  • Keys
    • 1.f4!
      • threat
        • 2.Qh1#
      • 1...Ke4
        • 2.Qh1#
      • 1...Kc6
        • 2.Qxb7#
      • 1...Bh5
        • 2.Qxb7#
      • 1...Sc5
        • 2.Sb4#
      • 1...Sd6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB1(H),XS(c)
    • B(e);N_GUARD::QAB(H),XS(c)
    • S(c);SBLOCK::S(E)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(4)
      • Vars
        • B(e);::S(E)
      • Refutation
        • B(d);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • B(d);P_SPINB(d)::S(E)
        • S(c);P_SPINS(c)::S(E)
      • Refutation
        • B(e);XQ(H)
  • Actual
    • P(D);
    • Threat
      • QAB(H)
    • Vars
      • K(b);S_FLIGHT::QAB(H)
      • K(b);S_FLIGHT::QAB1(H),XS(c)
      • B(e);N_GUARD::QAB(H),XS(c)
      • S(c);SBLOCK::S(C)
      • S(c);SBLOCK::S(E)
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