MESON Chess Problem Database

Problem Display
PID: 22094 (8/8/1KNp4/3k1qR1/4r1N1/3r1Q2/3R2n1/8 w - - 0 1)

Langstaff, William A

2nd Prize, Good Companions, 1924

8/8/1KNp4/3k1qR1/4r1N1/3r1Q2/3R2n1/8

#2

6 + 6

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qxd3#
    • 1...Ke6
      • 2.Qxf5#
    • 1...Qe5
      • 2.Qf7#
    • 1...Rd4
      • 2.Qb3#
  • Tries
    • 1.Se3+?
      • 1...Ke6
        • 2.Qxf5#
      • 1...Sxe3!
    • 1.Sf6+?
      • 1...Kc4
        • 2.Qxd3#
      • 1...Ke6!
    • 1.Rxd3+?
      • 1...Ke6
        • 2.Qxf5#
      • 1...Kc4!
    • 1.Rxf5+?
      • 1...Kc4
        • 2.Qxd3#
      • 1...Ke6!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Qxe4#
      • 1...Kc4
        • 2.Qxd3#
      • 1...Ke6
        • 2.Qxf5#
      • 1...Qe5
        • 2.Qf7#
      • 1...Rd4
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(d);N_SPINQ(e),N_SPINR(b),S_FLIGHT::QAB1(B),XR(b)
    • K(d);N_SPINQ(e),N_SPINR(b),S_FLIGHT::QAB1(B),XQ(e)
    • Q(e);OGATE::QAB(B)
    • R(b);OGATE::QAB(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);N_SPINQ(e),N_SPINR(b),S_FLIGHT::QAB1(B),XQ(e)
      • Refutation
        • S(a);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(d);N_SPINQ(e),N_SPINR(b),S_FLIGHT::QAB1(B),XR(b)
      • Refutation
        • K(d);N_SPINQ(e),N_SPINR(b),S_FLIGHT
    • Try
      • R(A);CHECK,P_PINR(c),XR(b)
      • Vars
        • K(d);N_SPINQ(e),N_SPINR(c),S_FLIGHT::QAB1(B),XQ(e)
      • Refutation
        • K(d);N_SPINQ(e),N_SPINR(c),S_FLIGHT
    • Try
      • R(D);CHECK,XQ(e)
      • Vars
        • K(d);N_SPINR(b),S_FLIGHT::QAB1(B),XR(b)
      • Refutation
        • K(d);N_SPINR(b),S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAB1(B),XR(c)
    • Vars
      • K(d);N_SPINQ(e),N_SPINR(b),S_FLIGHT::QAB1(B),XR(b)
      • K(d);N_SPINQ(e),N_SPINR(b),S_FLIGHT::QAB1(B),XQ(e)
      • Q(e);OGATE::QAB(B)
      • R(b);OGATE::QAB(B)
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