MESON Chess Problem Database

Problem Display
PID: 18137 (2K1Qn2/b1Pr4/ppk5/1n1R4/B3P3/8/8/8 w - - 0 1)

Caine, Walter Edmund

Time & Tide, 1953

2K1Qn2/b1Pr4/ppk5/1n1R4/B3P3/8/8/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bb8
      • 2.cxb8S#
    • 1...Se6
      • 2.Qxd7#
    • 1...Sg6
      • 2.Qxd7#
    • 1...Sh7
      • 2.Qxd7#
    • 1...a5
      • 2.Bxb5#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Qc3#
      • 1...Rxc7+
        • 2.Qxc7#
      • 1...Rd8+
        • 2.cxd8S#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Se6!
    • 1.Qe6+?
      • 1...Rd6
        • 2.Qxd6#
      • 1...Sxe6!
  • Keys
    • 1.Qd8!
      • 1...Rxc7+
        • 2.Qxc7#
      • 1...Rxd8+
        • 2.cxd8S#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Bb8
        • 2.cxb8S#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Re7
        • 2.Qd6#
      • 1...Rf7
        • 2.Qd6#
      • 1...Rg7
        • 2.Qd6#
      • 1...Rh7
        • 2.Qd6#
      • 1...Se6
        • 2.Qxd7#
      • 1...Sg6
        • 2.Qxd7#
      • 1...Sh7
        • 2.Qxd7#
      • 1...a5
        • 2.Bxb5#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(e);OGATE::PXB(e)=S
    • S(g);N_GUARD::QAB1(F),XR(f)
    • P(b);N_GUARD::B(A),XS(a)
  • Tries
    • Try
      • Q(F);N_PINR(f)
      • Threat
        • QAR(F)
      • Vars
        • R(f);CHECK,OGATE,XP(D)::QAR1(F),XR(f)
        • R(f);CHECK,OGATE::PXR(f)=S
        • R(f);OGATE,XR(C)::QAB1(F),XR(f)
      • Refutation
        • S(g);
    • Try
      • Q(F);CHECK,N_PINR(f)
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAR1(F),XR(f)
      • Refutation
        • S(g);XQ(F)
  • Actual
    • Q(F);N_PINR(f)
    • Vars
      • R(f);CHECK,OGATE,XP(D)::QAR1(F),XR(f)
      • R(f);CHECK,OGATE,XQ(F)::PXR(f)=S
      • R(f);OGATE,XR(C)::QAB1(F),XR(f)
      • B(e);OGATE::PXB(e)=S
      • R(f);OGATE::QAR1(F),XR(f)
      • R(f);OGATE::QAR1(F)
      • S(g);N_GUARD::QAB1(F),XR(f)
      • P(b);N_GUARD::B(A),XS(a)
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