MESON Chess Problem Database

Problem Display
PID: 150350 (6n1/2p5/2PNk3/3NPp2/3K1P2/8/4Q3/8 w - - 0 1)

Evans, TC

The Referee, 1925

(First published on Sun Oct 4 1925)

6n1/2p5/2PNk3/3NPp2/3K1P2/8/4Q3/8

#2

7 + 4

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Se7
      • 2.Sxc7#
  • Tries
    • 1.Qh5?
      • threat
        • 2.Qf7#
        • 2.Qxf5#
      • 1...Sh6
        • 2.Qg6#
        • 2.Qe8#
        • 2.Qxh6#
      • 1...Se7
        • 2.Sxc7#
        • 2.Qf7#
      • 1...cxd6!
    • 1.Qg2?
      • threat
        • 2.Qxg8#
      • 1...Sh6
        • 2.Qg6#
      • 1...Se7
        • 2.Sxc7#
      • 1...Sf6!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxf5#
        • 2.Qxg8#
      • 1...fxg4
        • 2.f5#
      • 1...cxd6
        • 2.Qxg8#
      • 1...Sf6
        • 2.Qxf5#
      • 1...Sh6
        • 2.Qg6#
      • 1...Se7
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(d);SBLOCK::S(D),XP(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);XS(G)
    • Try
      • Q(A);
      • Threat
        • QAB(A),XS(d)
      • Vars
        • S(d);N_GUARD::QAR2(A)
        • S(d);SBLOCK::S(D),XP(c)
      • Refutation
        • S(d);
  • Actual
    • Q(A);P_PINP(a)
    • Threat
      • DUALS(2)
    • Vars
      • P(a);N_SPINP(a),OGATE,XQ(A)::P(C)
      • P(c);XS(G)::QAB(A),XS(d)
      • S(d);::QAB1(A),XP(a)
      • S(d);N_GUARD::QAR2(A)
      • S(d);SBLOCK::S(D),XP(c)
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