MESON Chess Problem Database

Problem Display
PID: 139892 (8/4K3/8/3k1bnR/5Q2/8/8/2R5 w - - 0 1)

Davis, Edward

Kipping, Cyril Stanley

The Problemist, 1938

8/4K3/8/3k1bnR/5Q2/8/8/2R5

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qd6#
    • 1...Sh3
      • 2.Rxf5#
    • 1...Se6
      • 2.Rxf5#
    • 1...Sh7
      • 2.Rxf5#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Rc5#
      • 1...Se4
        • 2.Rxf5#
      • 1...Se6
        • 2.Rxf5#
      • 1...Bc2!
    • 1.Qb4?
      • threat
        • 2.Rc5#
      • 1...Ke5
        • 2.Rc5#
      • 1...Se4
        • 2.Rxf5#
      • 1...Se6
        • 2.Rxf5#
      • 1...Bc2!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qd4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf3
        • 2.Qe4#
      • 1...Se6
        • 2.Rxf5#
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(b);P_SPINS(c),SBLOCK::QAR1(B)
    • S(c);OGATE,P_SPINB(b)::R(C),XB(b)
  • Tries
    • Try
      • Q(B);
      • Threat
        • R1(A)
      • Vars
        • S(c);OGATE,P_SPINB(b)::R(C),XB(b)
      • Refutation
        • B(b);P_SPINS(c)
    • Try
      • Q(B);
      • Threat
        • R1(A)
      • Vars
        • K(a);P-FLIGHT::R(A)
        • S(c);OGATE,P_SPINB(b)::R(C),XB(b)
      • Refutation
        • B(b);P_SPINS(c)
  • Actual
    • R(A);
    • Threat
      • QAR1(B)
    • Vars
      • B(b);N_GUARD,P_SPINS(c)::QAB1(B),XB(b)
      • S(c);N_GUARD,P_SPINB(b)::QAB1(B),XS(c)
      • S(c);N_GUARD,P_SPINB(b)::QAB1(B)
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Developed and maintained by Brian Stephenson.
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