MESON Chess Problem Database

Problem Display
PID: 319 (8/3K4/8/3NpkNQ/7B/4p2b/8/8 w - - 0 1)

Evans, TC

The Observer, 1923

(First published on Sun Jan 7 1923)

8/3K4/8/3NpkNQ/7B/4p2b/8/8

#2

5 + 4

887 Mate in Two Moves 1931
3310 2345 Chess Problems 1997
14868 Pirnie Collection 2012
15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bg4
      • 2.Qf7#
      • 2.Qh7#
    • 1...e4
      • 2.Sf3#
      • 2.Sxh3#
      • 2.Se6#
      • 2.Sf7#
      • 2.Sh7#
  • Tries
    • 1.Sxe3+?
      • 1...Kf6+
        • 2.Se6#
      • 1...Kf4+!
    • 1.Sf6?
      • threat
        • 2.Sxh3#
        • 2.Se6#
      • 1...Kf4+
        • 2.Sxh3#
      • 1...Kxf6+
        • 2.Se6#
      • 1...Bf1
        • 2.Sh3#
        • 2.Se6#
      • 1...Bg2
        • 2.Sh3#
        • 2.Se6#
      • 1...Bg4!
    • 1.Se7+?
      • 1...Kf6+
        • 2.Se6#
      • 1...Kf4+!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Sxh3#
        • 2.Se6#
      • 1...Kf4+
        • 2.Sxh3#
      • 1...Kf6+
        • 2.Se6#
      • 1...Bf1
        • 2.Sh3#
        • 2.Se6#
      • 1...Bg2
        • 2.Sh3#
        • 2.Se6#
      • 1...Bg4
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK,XP(a)
      • Vars
        • K(d);CHECK,P-FLIGHT::B(A)+S(C)
      • Refutation
        • K(d);CHECK,P-FLIGHT
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);CHECK,P-FLIGHT::S(C),XB(b)
        • K(d);CHECK,P-FLIGHT,XS(B)::B(A)+S(C)
      • Refutation
        • B(b);
    • Try
      • S(B);CHECK
      • Vars
        • K(d);CHECK,P-FLIGHT::B(A)+S(C)
      • Refutation
        • K(d);CHECK,P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);CHECK,P-FLIGHT::S(C),XB(b)
      • K(d);CHECK,P-FLIGHT::B(A)+S(C)
      • B(b);SBLOCK::QAR2(D)
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