MESON Chess Problem Database

Problem Display
PID: 66890 (8/8/8/B7/4N3/Qprp2N1/8/1K1k4 w - - 0 1)

Kipping, Cyril Stanley

Chess, 1947

8/8/8/B7/4N3/Qprp2N1/8/1K1k4

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ke1
      • 2.Qc1#
    • 1...Rc1+
      • 2.Qxc1#
    • 1...Rc4
      • 2.Sf2#
    • 1...Rc5
      • 2.Sf2#
    • 1...Rc6
      • 2.Sf2#
    • 1...Rc7
      • 2.Sf2#
    • 1...Rc8
      • 2.Sf2#
  • Tries
    • 1.Sf2+?
      • 1...Kd2
        • 2.Qc1#
      • 1...Ke1!
    • 1.Sxc3+?
      • 1...Kd2
        • 2.Qc1#
      • 1...Ke1!
    • 1.Bxc3?
      • threat
        • 2.Sf2#
        • 2.Qc1#
        • 2.Qxb3#
      • 1...b2
        • 2.Sf2#
        • 2.Qb3#
        • 2.Qa4#
      • 1...d2!
    • 1.Qb2?
      • threat
        • 2.Qd2#
      • 1...Rc1+
        • 2.Qxc1#
      • 1...Ke1
        • 2.Qc1#
        • 2.Qd2#
      • 1...d2
        • 2.Qxd2#
      • 1...Rc2!
    • 1.Qf8?
      • threat
        • 2.Qf1#
      • 1...Ke1
        • 2.Qf1#
      • 1...Rc1+!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qg1#
      • 1...Rc1+
        • 2.Qxc1#
      • 1...Ke1
        • 2.Qg1#
      • 1...Rxc5
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • K(a);P-FLIGHT,P_SPINR(c)::QAR2(B)
    • R(c);CHECK,N_GUARD::QAR1(B),XR(c)
    • R(c);::S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINR(c)::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINR(c)
    • Try
      • S(D);CHECK,XR(c)
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(E);XR(c)
      • Threat
        • DUALS(3)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(c);CHECK,N_GUARD::QAR1(B),XR(c)
        • P(d);::QAR1(B),XP(d)
      • Refutation
        • R(c);
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(a);P-FLIGHT,P_SPINR(c)::QAR1(B)
      • Refutation
        • R(c);CHECK
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • R(c);CHECK,OGATE::QAR1(B),XR(c)
      • K(a);P-FLIGHT,P_SPINR(c)::QAR2(B)
      • R(c);XQ(B)::S(D)
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