MESON Chess Problem Database

Problem Display
PID: 229661 (6rr/4QP1p/7k/5KR1/8/8/8/8 w - - 0 1)

Head, Arthur James

Southend Times, 1937

(First published on Wed Apr 7 1937)

6rr/4QP1p/7k/5KR1/8/8/8/8

#2

4 + 4

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg5+
      • 2.Qxg5#
    • 1...Ra8
      • 2.Qd6#
      • 2.Qf6#
      • 2.Qe6#
    • 1...Rb8
      • 2.Qd6#
      • 2.Qf6#
      • 2.Qe6#
    • 1...Rc8
      • 2.Qd6#
      • 2.Qf6#
      • 2.Qe6#
    • 1...Rd8
      • 2.Qf6#
      • 2.Qe6#
    • 1...Re8
      • 2.Qf6#
    • 1...Rf8
      • 2.Qd6#
      • 2.Qf6#
      • 2.Qe6#
  • Tries
    • 1.Rh5+?
      • 1...Kg7
        • 2.f8Q#
        • 2.f8S#
        • 2.f8B#
        • 2.f8R#
      • 1...Kxh5!
    • 1.Rxg8?
      • threat
        • 2.Qh4#
        • 2.Qg5#
      • 1...Kh5
        • 2.Qg5#
      • 1...Rxg8!
    • 1.Qf8+?
      • 1...Rg7
        • 2.Qxg7#
      • 1...Rxf8!
    • 1.Qe3?
      • threat
        • 2.Qh3#
      • 1...Rxg5+
        • 2.Qxg5#
      • 1...Rg6!
    • 1.f8Q+?
      • 1...Rg7
        • 2.Qd6#
        • 2.Qef6#
        • 2.Qfxg7#
        • 2.Qe6#
        • 2.Qexg7#
      • 1...Rxf8+!
    • 1.f8B+?
      • 1...Rg7
        • 2.Bxg7#
        • 2.Qd6#
        • 2.Qf6#
        • 2.Qe6#
        • 2.Qxg7#
      • 1...Rxf8+!
  • Keys
    • 1.Rg7!
      • threat
        • 2.Qg5#
      • 1...Kh5
        • 2.Qg5#
      • 1...Kxg7
        • 2.f8Q#
        • 2.f8B#
      • 1...Rxg7
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(c);CHECK,OGATE,XR(B)::QAB1(C),XR(c)
    • R(c);N_GUARD::QAR2(C)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • R(B);XR(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • R(d);XR(B)
    • Try
      • Q(C);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(C),XR(c)
      • Refutation
        • R(c);P_PINP(D),XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • R(c);CHECK,OGATE,P_SPINR(c),XR(B)::QAB1(C),XR(c)
      • Refutation
        • R(c);
    • Try
      • P(D);CHECK
      • Refutation
        • R(c);CHECK,XQ(D)
    • Try
      • P(D);CHECK
      • Refutation
        • R(c);CHECK,XB(D)
  • Actual
    • R(B);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • K(a);S_FLIGHT,XR(B)::P=Q
      • R(c);SBLOCK,XR(B)::QAR2(C)
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