MESON Chess Problem Database

Problem Display
PID: 267973 (2K1R3/3P4/1B2pr2/1BNp2q1/2rk1pn1/3N4/3P2Q1/8 w - - 0 1)

Evans, TC

The Referee, 1928

(First published on Sun Sep 2 1928)

2K1R3/3P4/1B2pr2/1BNp2q1/2rk1pn1/3N4/3P2Q1/8

#2

9 + 8

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Sb3#
      • 2.Sxa4#
      • 2.Se4#
      • 2.Sa6#
      • 2.Sxe6#
      • 2.Sb7#
    • 1...Rb4
      • 2.Sb3#
      • 2.Sa4#
      • 2.Se4#
      • 2.Sa6#
      • 2.Sxe6#
      • 2.Sb7#
    • 1...Rxc5+
      • 2.Bxc5#
    • 1...Sf2
      • 2.Qxf2#
    • 1...Sh2
      • 2.Qf2#
    • 1...Se5
      • 2.Qf2#
    • 1...Sh6
      • 2.Qf2#
  • Tries
    • 1.Qg1+?
      • 1...Sf2
        • 2.Qxf2#
      • 1...Se3!
    • 1.d8S?
      • threat
        • 2.Sc6#
      • 1...Se5
        • 2.Qf2#
      • 1...e5!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Sc6#
      • 1...Ke5
        • 2.Qxd5#
      • 1...Rxb4
        • 2.Sd3#
      • 1...Se5
        • 2.Qf2#
      • 1...e5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(a);CHECK,OGATE,P_SPINR(a),XS(E)::B(F),XR(a)
    • S(d);N_GUARD::QAB(B),XS(d)
    • S(d);N_GUARD::QAB(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB(B),XS(d)
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • P(G);
      • Threat
        • S(G)
      • Vars
        • S(d);N_GUARD::QAB(B)
      • Refutation
        • P(g);
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(b);P_SPINP(g),S_CUTQ(f),S_FLIGHT::QAR1(B),XP(e)
      • R(a);N_PINS(E),XS(C)::B(F)+S(E)
      • S(d);N_GUARD,SBLOCK::QAB(B)
      • P(g);N_GUARD,S_CUTQ(f)::QAR1(B),XP(e)
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