MESON Chess Problem Database

Problem Display
PID: 187566 (5rn1/3N4/p3R3/r2p2K1/np1k1p1N/q4Pp1/B3Q3/4B3 w - - 0 1)

Evans, TC

The Observer, 1936

(First published on Sat Feb 15 1936)

5rn1/3N4/p3R3/r2p2K1/np1k1p1N/q4Pp1/B3Q3/4B3

#2

8 + 11

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qe5#
    • 1...Qxf3
      • 2.Sxf3#
    • 1...Rf5+
      • 2.Sxf5#
    • 1...Ra8
      • 2.Sf5#
    • 1...Rb8
      • 2.Sf5#
    • 1...Rc8
      • 2.Sf5#
    • 1...Rd8
      • 2.Sf5#
    • 1...Re8
      • 2.Sf5#
    • 1...Sc3
      • 2.Qd2#
    • 1...Sf6
      • 2.Sf5#
  • Keys
    • 1.Rd6!
      • threat
        • 2.Qe4#
      • 1...Rf5+
        • 2.Sxf5#
      • 1...Qxf3
        • 2.Sxf3#
      • 1...Qd3
        • 2.Qe5#
      • 1...Qe3
        • 2.Qc4#
      • 1...Re8
        • 2.Sf5#
      • 1...Sc3
        • 2.Qd2#
      • 1...Sc5
        • 2.Rxd5#
      • 1...Sf6
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(a);SBLOCK::QAB1(C)
    • Q(a);XP(D)::S(E),XQ(a)
    • R(j);CHECK,N_GUARD::S(E),XR(j)
    • R(j);N_GUARD::S(E)
    • S(c);S_CUTQ(a)::QAR2(C)
    • S(k);S_CUTR(j)::S(E)
  • Actual
    • R(G);P_PINP(h)
    • Threat
      • QAR1(C)
    • Vars
      • R(j);CHECK,N_GUARD::S(E),XR(j)
      • Q(a);XP(D)::S(E),XQ(a)
      • Q(a);SBLOCK::QAB1(C)
      • Q(a);SBLOCK::QAR1(C)
      • R(j);N_GUARD::S(E)
      • S(c);S_CUTQ(a)::QAR2(C)
      • S(c);S_CUTR(g)::R1(G),XP(h)
      • S(k);S_CUTR(j)::S(E)
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