MESON Chess Problem Database

Problem Display
PID: 144425 (8/3Kn3/1p6/1B1k1p1R/1r1p1b2/B2Q4/5N2/8 w - - 0 1)

Kipping, Cyril Stanley

Magyar Sakkvilag, 1931

8/3Kn3/1p6/1B1k1p1R/1r1p1b2/B2Q4/5N2/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qc4#
    • 1...Rb1
      • 2.Qe4#
    • 1...Rb2
      • 2.Qe4#
    • 1...Rb3
      • 2.Qe4#
    • 1...Ra4
      • 2.Qe4#
    • 1...Rc4
      • 2.Qe4#
    • 1...Rxb5
      • 2.Qxb5#
  • Tries
    • 1.Bc6+?
      • 1...Kc5
        • 2.Se4#
        • 2.Qc2#
        • 2.Qb5#
      • 1...Ke5
        • 2.Sg4#
      • 1...Sxc6!
    • 1.Qc4+?
      • 1...Ke5
        • 2.Qe6#
      • 1...Rxc4!
    • 1.Qxf5+?
      • 1...Be5
        • 2.Qxe5#
      • 1...Sxf5!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Sg4#
      • 1...Kc5!
  • Keys
    • 1.Bc4+!
      • 1...Kc5
        • 2.Se4#
      • 1...Ke5
        • 2.Sg4#
      • 1...Rxc4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • K(d);N_SPINP(b),P-FLIGHT,P_SPINP(e),P_SPINR(a)::QAR1(C)
    • R(a);::QAB1(C)
    • R(a);OGATE,XB(D)::QAR2(C),XR(a)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(d);N_SPINP(b),P-FLIGHT,P_SPINP(e)::S(A)
      • Refutation
        • S(g);XB(D)
    • Try
      • Q(C);CHECK,N_PINP(b),P_PINP(e)
      • Vars
        • K(d);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • R(a);XQ(C)
    • Try
      • Q(C);CHECK,N_PINP(b),XP(e)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(C),XB(c)
      • Refutation
        • S(g);P_SPINS(g),XQ(C)
    • Try
      • Q(C);CHECK,N_PINP(b),P_PINP(e)
      • Vars
        • K(d);P-FLIGHT::S(A)
      • Refutation
        • K(d);P-FLIGHT,P_SPINR(a)
  • Actual
    • B(D);CHECK
    • Vars
      • K(d);N_SPINP(b),P-FLIGHT,P_SPINP(e),P_SPINR(a)::S(A)
      • K(d);N_SPINP(b),P-FLIGHT,P_SPINP(e)::S(A)
      • R(a);SBLOCK,XB(D)::QAB1(C)
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