MESON Chess Problem Database

Problem Display
PID: 9867 (8/1BK1N3/2p5/8/n7/1Rqk1P2/1nR5/N5B1 w - - 0 1)

Lipton, Michael

Rice, John Michael

4th HM., Die Schwalbe, 1960

8/1BK1N3/2p5/8/n7/1Rqk1P2/1nR5/N5B1

#2

8 + 5

3749 FIDE Album (1959-1961) 1966
3174 The Two-move Chess Problem Tradition and Development 1966
5174 Chess Problem Spectrum 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Ba6#
    • 1...Sd1
      • 2.Ba6#
    • 1...Sc5
      • 2.Rbxc3#
    • 1...Sb6
      • 2.Rbxc3#
  • Tries
    • 1.Sg6?
      • threat
        • 2.Se5#
      • 1...Sc4
        • 2.Sf4#
      • 1...Kc4!
    • 1.Bxc6?
      • 1...Kc4
        • 2.Bb5#
      • 1...Qxb3
        • 2.Be4#
      • 1...Sc4
        • 2.Be4#
      • 1...Sc5
        • 2.Rbxc3#
      • 1...Sb6
        • 2.Rbxc3#
      • 1...Sd1!
    • 1.Bc8?
      • 1...Kc4
        • 2.Ba6#
      • 1...Qxb3
        • 2.Bf5#
      • 1...Sc4
        • 2.Bf5#
      • 1...Sd1
        • 2.Ba6#
      • 1...Sc5
        • 2.Rbxc3#
      • 1...Sb6
        • 2.Rbxc3#
      • 1...c5!
    • 1.Rd2+?
      • 1...Kc4
        • 2.Ba6#
      • 1...Kxd2!
  • Keys
    • 1.Sxc6!
      • 1...Kc4
        • 2.Se5#
      • 1...Qxb3
        • 2.Se5#
      • 1...Sc4
        • 2.Sb4#
      • 1...Sd1
        • 2.Ba6#
      • 1...Sc5
        • 2.Se5#
        • 2.Rbxc3#
      • 1...Sb6
        • 2.Rbxc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);S_FLIGHT::B(F)
    • S(a);N_GUARD::B(F)
    • S(d);N_GUARD::R1(D),XQ(b)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • S(a);SBLOCK::S(H)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(F);P_SPINB(F),XP(e)
      • Vars
        • K(c);N_PINB(F),S_FLIGHT::B(F)
        • Q(b);N_PINB(F),N_SPINQ(b),XR(D)::B(F)
        • S(a);N_PINB(F),SBLOCK::B(F)
        • S(d);N_GUARD,N_PINB(F)::R1(D),XQ(b)
        • S(d);N_GUARD::R1(D),XQ(b)
      • Refutation
        • S(a);
    • Try
      • B(F);
      • Vars
        • K(c);S_FLIGHT::B(F)
        • Q(b);N_SPINQ(b),XR(D)::B(F)
        • S(a);SBLOCK::B(F)
        • S(a);N_GUARD::B(F)
        • S(d);N_GUARD::R1(D),XQ(b)
      • Refutation
        • P(e);
    • Try
      • R(C);CHECK
      • Vars
        • K(c);N_SPINQ(b),S_FLIGHT::B(F)
      • Refutation
        • K(c);N_SPINQ(b),P-FLIGHT,XR(C)
  • Actual
    • S(H);P_SPINS(H),XP(e)
    • Vars
      • K(c);N_PINS(H),S_FLIGHT::S(H)
      • Q(b);N_PINS(H),N_SPINQ(b),XR(D)::S(H)
      • S(a);N_PINS(H),SBLOCK::S(H)
      • S(a);N_GUARD::B(F)
      • S(d);N_GUARD::R1(D),XQ(b)
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