MESON Chess Problem Database

Problem Display
PID: 185135 (3b4/2qp4/2n5/1Q6/4k3/R6N/5B2/5K2 w - - 0 1)

Silver, BW

The Observer, 1930

(First published on Sun May 25 1930)

3b4/2qp4/2n5/1Q6/4k3/R6N/5B2/5K2

#2

5 + 5

15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qd3#
    • 1...Sd4
      • 2.Re3#
  • Keys
    • 1.Rf3!
      • threat
        • 2.Qf5#
      • 1...Kxf3
        • 2.Qe2#
      • 1...d5
        • 2.Qe2#
      • 1...Qf4
        • 2.Rxf4#
      • 1...Qa5
        • 2.Rf4#
      • 1...Qe5
        • 2.Qd3#
      • 1...Sd4
        • 2.Re3#
      • 1...Se5
        • 2.Rf4#
      • 1...Se7
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(c);SBLOCK::QAB1(E)
    • S(b);SBLOCK::R1(C)
  • Actual
    • R(C);
    • Threat
      • QAB1(E)
    • Vars
      • K(a);S_FLIGHT,XR(C)::QAB1(E)
      • P(d);SBLOCK::QAR2(E)
      • Q(c);N_GUARD::R1(C),XQ(c)
      • Q(c);N_GUARD::R1(C)
      • Q(c);SBLOCK::QAB1(E)
      • S(b);SBLOCK::R1(C)
      • S(b);S_CUTQ(c)::R1(C)
      • S(b);S_CUTB(e)::S(D)
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