MESON Chess Problem Database

Problem Display
PID: 139984 (1N2kr2/8/3P2P1/B4p2/4r3/2N5/2R5/4RK2 w - - 0 1)

Kipping, Cyril Stanley

Pickering, S

The Problemist, 1938

1N2kr2/8/3P2P1/B4p2/4r3/2N5/2R5/4RK2

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Rexe2#
      • 2.Rcxe2#
    • 1...Re3
      • 2.Rxe3#
    • 1...Re5
      • 2.Rxe5#
    • 1...Re6
      • 2.Rxe6#
    • 1...Re7
      • 2.Rxe7#
      • 2.d7#
    • 1...f4
      • 2.Rxe4#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Sd2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sf6#
        • 2.Rc8#
      • 1...Rf6
        • 2.Rc8#
      • 1...Rf7
        • 2.Rc8#
      • 1...Rg8
        • 2.Rc8#
      • 1...Rh8
        • 2.Rc8#
      • 1...fxe4+!
    • 1.Sd5?
      • threat
        • 2.Rc8#
        • 2.d7#
      • 1...Rf6
        • 2.Rc8#
      • 1...Rf7
        • 2.Rc8#
      • 1...Rg8
        • 2.Rc8#
      • 1...Rh8
        • 2.Rc8#
      • 1...Rxe1+!
  • Keys
    • 1.Se2!
      • threat
        • 2.Rc8#
      • 1...Rf4+
        • 2.Sxf4#
      • 1...Rc4
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(a);OGATEB::R(A),XR(a)
    • R(a);OGATE::R(A),XR(a)
    • P(b);N_GUARD::R(A),XR(a)
  • Tries
    • Try
      • S(D);XR(a)
      • Threat
        • DUALS(8)
      • Vars
        • R(d);::R(C)
      • Refutation
        • P(b);CHECK,P_SPINP(b),XS(D)
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::R(C)
      • Refutation
        • R(a);CHECK,N_SPINR(a),XR(A)
  • Actual
    • S(D);N_PINR(a)
    • Threat
      • R(C)
    • Vars
      • R(a);CHECK::R(A)+S(D),XR(a)
      • R(a);::R(A)+S(D)
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