MESON Chess Problem Database

Problem Display
PID: 150873 (8/5n2/4N3/1Q6/3Pk2N/8/3P1rpK/6B1 w - - 0 1)

Evans, TC

The Referee, 1926

(First published on Sun Oct 3 1926)

8/5n2/4N3/1Q6/3Pk2N/8/3P1rpK/6B1

#2

7 + 4

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.d3#
    • 1...Rxd2
      • 2.Qf5#
    • 1...Re2
      • 2.Qf5#
      • 2.d3#
    • 1...Rf4
      • 2.d3#
    • 1...Rf5
      • 2.Qxf5#
      • 2.d3#
    • 1...Rf6
      • 2.d3#
  • Tries
    • 1.Sg5+?
      • 1...Kxd4
        • 2.Shf3#
        • 2.Sf5#
        • 2.Bxf2#
      • 1...Kf4
        • 2.Qf5#
      • 1...Sxg5!
  • Keys
    • 1.Sf4!
      • 1...Kxd4
        • 2.Qd5#
      • 1...Kxf4
        • 2.Qf5#
      • 1...Rxd2
        • 2.Qf5#
      • 1...Rxf4
        • 2.d3#
      • 1...Rf1
        • 2.Qf5#
      • 1...Re2
        • 2.Qf5#
      • 1...Rf3
        • 2.Qf5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sg5
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#
      • 1...Sh6
        • 2.Qe5#
      • 1...Sd8
        • 2.Qe5#
      • 1...Sh8
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • R(a);::P(B)
    • R(a);N_GUARD,XP(B)::QAB1(F)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(F)
      • Refutation
        • S(d);XS(G)
  • Actual
    • S(G);
    • Vars
      • K(c);P-FLIGHT,P_SPINR(a),XP(D)::QAR1(F)
      • K(c);P-FLIGHT,XS(G)::QAR1(F)
      • R(a);XP(B)::QAB1(F)
      • R(a);SBLOCK,XS(G)::P(B)
      • R(a);::QAB1(F)
      • S(d);N_GUARD::QAR1(F),XS(d)
      • S(d);N_GUARD::QAR1(F)
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