MESON Chess Problem Database

Problem Display
PID: 200828 (4b3/2B5/p1PR2P1/4k1q1/6nr/K1N1p2B/8/5Q2 w - - 0 1)

Stewart, John

Stubbs, Arthur Goodwin

The Observer, 1948

(First published on Sun Nov 28 1948)

4b3/2B5/p1PR2P1/4k1q1/6nr/K1N1p2B/8/5Q2

#2

8 + 7

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sh2
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
      • 2.Rd5#
      • 2.Rd7#
      • 2.Rd8#
    • 1...Sf6
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
      • 2.Rd5#
      • 2.Rd7#
      • 2.Rd8#
    • 1...Sh6
      • 2.Rd1#
      • 2.Rd2#
      • 2.Rd3#
      • 2.Rd5#
      • 2.Rd7#
      • 2.Rd8#
  • Tries
    • 1.Qb5+?
      • 1...Kf4
        • 2.Rf6#
      • 1...axb5!
    • 1.Qf4+?
      • 1...Kxf4
        • 2.Rf6#
      • 1...Qxf4!
    • 1.Qf6+?
      • 1...Sxf6
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd3#
        • 2.Rd5#
        • 2.Rd7#
        • 2.Rd8#
      • 1...Qxf6!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Rf6#
      • 1...Qxg6
        • 2.Rxg6#
      • 1...Bxc6
        • 2.Rxc6#
      • 1...Bxg6
        • 2.Rxg6#
      • 1...Qf4
        • 2.Qd5#
      • 1...Qf5
        • 2.Qd4#
      • 1...Sf2
        • 2.Re6#
      • 1...Sh2
        • 2.Re6#
      • 1...Sf6
        • 2.Rd4#
        • 2.Rd5#
        • 2.Re6#
        • 2.Rd7#
        • 2.Rd8#
      • 1...Sh6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);S_FLIGHT::B(H)+R(F),DCHECK
      • Refutation
        • P(f);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);S_FLIGHT,XQ(A)::B(H)+R(F),DCHECK
      • Refutation
        • Q(e);XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • Q(e);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(d);S_FLIGHT::B(H)+R(F),DCHECK
      • Q(e);OGATE,XP(G)::B(H)+R(F),XQ(e)
      • B(g);OGATE,XP(E)::B(H)+R(F),XB(g)
      • B(g);OGATE,XP(G)::B(H)+R(F),XB(g)
      • Q(e);SBLOCK::QAR1(A)
      • Q(e);SBLOCK::QAB1(A)
      • S(b);::B(H)+R(F),DCHECK
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