MESON Chess Problem Database

Problem Display
PID: 323 (4N3/6pb/2r2B2/P1Pk1p1R/Q1p5/3N4/1p6/1Kb1R3 w - - 0 1)

Stubbs, Arthur Goodwin

The Observer, 1923

(First published on Sun Jan 28 1923)

4N3/6pb/2r2B2/P1Pk1p1R/Q1p5/3N4/1p6/1Kb1R3

#2

9 + 8

3360 Simple Two-move Themes 1924
15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Sb4#
      • 2.Qd7#
    • 1...Ra6
      • 2.Sc7#
    • 1...Rb6
      • 2.Sc7#
    • 1...Rd6
      • 2.Sc7#
    • 1...Re6
      • 2.Sc7#
    • 1...Rc7
      • 2.Sxc7#
    • 1...Rc8
      • 2.Qd7#
    • 1...Bg8
      • 2.Rxf5#
    • 1...cxd3
      • 2.Re5#
      • 2.Qd4#
    • 1...c3
      • 2.Re5#
      • 2.Qb3#
      • 2.Qa2#
      • 2.Qd4#
      • 2.Qe4#
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxc4#
      • 1...f4+
        • 2.Sg6#
      • 1...Kd4
        • 2.Qxc4#
      • 1...Kxc5
        • 2.Qxc4#
      • 1...Ke6
        • 2.Qxc6#
        • 2.Qxc4#
      • 1...Rxc5
        • 2.Qd7#
      • 1...c3
        • 2.Qc4#

There are these versions: 140857

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(f);N_GUARD::S(I)
    • R(f);N_GUARD::S(I),XR(f)
    • R(f);OGATE::QAR2(D)
    • B(h);N_GUARD::R(G),XP(e)
  • Actual
    • S(C);N_PINP(e)
    • Threat
      • QAB1(D),XP(c)
    • Vars
      • P(e);CHECK::R(G)+S(C)
      • K(d);P-FLIGHT,P_SPINP(c)::QAR1(D),XP(c)
      • K(d);P-FLIGHT,XP(F)::QAR1(D),XP(c)
      • R(f);OGATE,SBLOCK,XP(F)::QAR2(D)
      • P(c);::QAB1(D)
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