MESON Chess Problem Database

Problem Display
PID: 150279 (3r3B/rQ2n2N/1N1pkpB1/4p3/3pR3/3P1K2/8/8 w - - 0 1)

Foster, A

The Referee, 1925

(First published on Sun May 17 1925)

3r3B/rQ2n2N/1N1pkpB1/4p3/3pR3/3P1K2/8/8

#2

8 + 8

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rd7
      • 2.Sf8#
    • 1...Rf8
      • 2.Sxf8#
    • 1...Sf5
      • 2.Bf7#
    • 1...f5
      • 2.Sg5#
  • Tries
    • 1.Rxe5+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...fxe5
        • 2.Sg5#
      • 1...dxe5!
    • 1.Qd7+?
      • 1...Rdxd7
        • 2.Sf8#
      • 1...Raxd7!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Rxf6#
      • 1...e4+
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...exf4
        • 2.Qe4#
      • 1...Rf8
        • 2.Sxf8#
      • 1...Sd5
        • 2.Bf5#
        • 2.Bf7#
      • 1...Sf5
        • 2.Bxf5#
        • 2.Bf7#
      • 1...Sg8
        • 2.Bf5#
        • 2.Bf7#
      • 1...f5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(h);N_GUARD::S(G)
    • R(h);N_GUARD::S(G),XR(h)
    • S(g);SBLOCK::B(E)
    • P(e);N_GUARD::S(G)
  • Tries
    • Try
      • R(C);CHECK,XP(b)
      • Vars
        • K(d);P-FLIGHT,P_SPINP(e),XR(C)::QAR1(F)
        • P(e);XR(C)::S(G)
      • Refutation
        • P(c);XR(C)
    • Try
      • Q(F);CHECK
      • Vars
        • R(h);XQ(F)::S(G)
      • Refutation
        • R(f);XQ(F)
  • Actual
    • R(C);N_PINP(b)
    • Threat
      • R1(C),XP(e)
    • Vars
      • P(b);OGATEB,XR(C)::QAR2(F)
      • R(h);N_GUARD::S(G),XR(h)
      • P(e);N_GUARD::S(G)
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