MESON Chess Problem Database

Problem Display
PID: 187485 (6Q1/8/nr3p2/q3kn2/ppPR4/2P2P1B/7b/K7 w - - 0 1)

Evans, TC

The Observer, 1935

(First published on Sun Sep 29 1935)

6Q1/8/nr3p2/q3kn2/ppPR4/2P2P1B/7b/K7

#2

7 + 9

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Qxd5#
    • 1...Rd6
      • 2.Re4#
    • 1...Bg1
      • 2.f4#
    • 1...Sg3
      • 2.f4#
    • 1...Sd6
      • 2.Qe6#
    • 1...Sc5
      • 2.Qd5#
  • Keys
    • 1.Qd8!
      • threat
        • 2.Re4#
      • 1...Ke6
        • 2.Qe8#
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Sg3
        • 2.f4#
      • 1...Sd6
        • 2.Qe7#
      • 1...Sc5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(d);N_GUARD::QAR1(G),XQ(d)
    • R(h);SBLOCK::R1(F)
    • B(a);N_GUARD::P(C)
    • S(f);S_CUTB(a)::P(C)
    • S(f);S_CUTR(h)::QAR1(G)
    • S(g);S_CUTQ(d)::QAR1(G)
  • Actual
    • Q(G);
    • Threat
      • R1(F)
    • Vars
      • K(e);P-FLIGHT,P_SPINS(f)::QAR2(G)
      • S(f);OGATE,XR(F)::QAB1(G),XS(f)
      • Q(d);N_GUARD::QAR1(G),XQ(d)
      • S(f);S_CUTB(a)::P(C)
      • S(f);N_GUARD,S_CUTR(h)::QAR2(G)
      • S(g);S_CUTQ(d)::QAR1(G)
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