MESON Chess Problem Database

Problem Display
PID: 132185 (8/2B1R2K/5P2/2Q1NP2/4k1p1/r1p5/5pPn/2b5 w - - 0 1)

Shaw, EH

The Field, 1956

(First published on Thu Mar 22 1956)

8/2B1R2K/5P2/2Q1NP2/4k1p1/r1p5/5pPn/2b5

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Sf3#
      • 2.Sf7#
    • 1...Kxf5
      • 2.Sd7#
  • Tries
    • 1.Qc4+?
      • 1...Ke3
        • 2.Sf3#
      • 1...Kxf5!
    • 1.Qd5+?
      • 1...Ke3
        • 2.Sf3#
        • 2.Sc4#
        • 2.Sxg4#
        • 2.Sc6#
        • 2.Sg6#
        • 2.Sd7#
        • 2.Sf7#
      • 1...Kf4
        • 2.Sf3#
        • 2.Sf7#
      • 1...Kxf5
        • 2.Sd7#
      • 1...Kxd5!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Sf3#
        • 2.Sc6#
      • 1...Ke3
        • 2.Sf3#
      • 1...Kd4
        • 2.Sc6#
      • 1...Kf4
        • 2.Sf3#
        • 2.Sf7#
      • 1...Kxf5
        • 2.Sd7#
      • 1...Ra6
        • 2.Sc6#
      • 1...Bf4
        • 2.Qd3#
      • 1...Sf3
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(f);S_FLIGHT,XP(D)::QAR(B)+S(C)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);P-FLIGHT::R(G)+S(C)
      • Refutation
        • K(f);S_FLIGHT,XP(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);S_FLIGHT,XP(D)::QAR(B)+S(C)
      • Refutation
        • K(f);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(f);P-FLIGHT::R(G)+S(C)
      • K(f);P-FLIGHT::S(C)
      • K(f);S_FLIGHT,XP(D)::QAR(B)+S(C)
      • R(d);::R(G)+S(C)
      • B(a);SBLOCK::QAB1(B)
      • S(c);::R(G)+S(C),XS(c)
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