MESON Chess Problem Database

Problem Display
PID: 10080 (bR6/1n6/p7/P7/Bk1N1B1R/1PN4K/8/1Q6 w - - 0 1)

Lipton, Michael

1st HM., Schakend Nederland, 1961

bR6/1n6/p7/P7/Bk1N1B1R/1PN4K/8/1Q6

#2

10 + 4

3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Ka3
      • 2.Sc2#
  • Tries
    • 1.Sa2+?
      • 1...Ka3
        • 2.Sc2#
        • 2.Bc1#
      • 1...Kxa5
        • 2.Bc7#
      • 1...Kc5!
    • 1.Se4?
      • 1...Ka3
        • 2.Sc2#
      • 1...Kxa5!
    • 1.Sd5+?
      • 1...Ka3
        • 2.Sc2#
        • 2.Bc1#
        • 2.Qa1#
      • 1...Kxa5
        • 2.Sc6#
        • 2.Bd2#
        • 2.Bc7#
        • 2.Qe1#
      • 1...Kc5!
    • 1.Sc2+?
      • 1...Kxa5
        • 2.Bc7#
      • 1...Kc5
        • 2.Rh5#
        • 2.Rc8#
        • 2.Qg1#
      • 1...Kxc3!
    • 1.Sde2?
      • 1...Ka3
        • 2.Bc1#
      • 1...Kxa5
        • 2.Bc7#
      • 1...Kc5!
    • 1.Sf3?
      • 1...Ka3
        • 2.Bc1#
      • 1...Kxc3
        • 2.Bd2#
        • 2.Be5#
      • 1...Kxa5
        • 2.Bc7#
      • 1...Kc5!
    • 1.Sf5?
      • 1...Ka3
        • 2.Bc1#
      • 1...Kxa5
        • 2.Bc7#
      • 1...Kc5
        • 2.Be3#
      • 1...Kxc3!
    • 1.Sc6+?
      • 1...Ka3
        • 2.Bc1#
        • 2.Qa2#
        • 2.Qa1#
        • 2.Qc1#
      • 1...Kc5
        • 2.Rh5#
        • 2.Qf5#
        • 2.Qg1#
      • 1...Kxc3!
    • 1.Se6?
      • 1...Ka3
        • 2.Bc1#
      • 1...Kxa5
        • 2.Bc7#
      • 1...Kxc3!
    • 1.Bc1?
      • 1...Kxc3
        • 2.Se2#
      • 1...Kc5
        • 2.Ba3#
      • 1...Kxa5!
    • 1.Bd2?
      • 1...Ka3
        • 2.Sc2#
      • 1...Kxa5
        • 2.Sd5#
      • 1...Kc5!
    • 1.Bg3?
      • 1...Ka3
        • 2.Sc2#
      • 1...Kxc3
        • 2.Be1#
      • 1...Kc5
        • 2.Se6#
      • 1...Kxa5!
    • 1.Be5?
      • 1...Ka3
        • 2.Sc2#
      • 1...Kxc3
        • 2.Sf3#
      • 1...Kc5
        • 2.Se6#
      • 1...Kxa5!
    • 1.Bd6+?
      • 1...Kxc3
        • 2.Qc2#
      • 1...Kxa5!
    • 1.Bc7?
      • 1...Ka3
        • 2.Sc2#
      • 1...Kc5
        • 2.Se6#
      • 1...Kxc3!
    • 1.Rh5?
      • 1...Ka3
        • 2.Sc2#
      • 1...Kxc3!
    • 1.Rxb7+?
      • 1...Ka3
        • 2.Sc2#
        • 2.Bc1#
        • 2.Bd6#
        • 2.Qa2#
        • 2.Qa1#
        • 2.Qc1#
      • 1...Kxc3
        • 2.Se2#
      • 1...Kxa5
        • 2.Sc6#
        • 2.Bc7#
        • 2.Rh5#
        • 2.Qf5#
        • 2.b4#
      • 1...Kc5
        • 2.Se6#
      • 1...Bxb7!
  • Keys
    • 1.Be3!
      • 1...Ka3
        • 2.Sc2#
      • 1...Kxc3
        • 2.Se2#
      • 1...Kxa5
        • 2.Sc6#
      • 1...Kc5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINS(c),S_FLIGHT::S(F)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)::B(G)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::S(F)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)::B(G)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT,XS(C)
    • Try
      • S(F);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::B(G)
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)::B(G)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • S(F);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::B(G)
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)::B(G)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • S(F);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::B(G)
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)::B(G)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT,XS(C)
    • Try
      • S(F);CHECK
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT,XS(C)
    • Try
      • S(F);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::B(G)
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)::B(G)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT,XS(C)
    • Try
      • B(G);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT,XS(C)::S(F)
        • K(a);N_SPINS(c),S_FLIGHT::B(G)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)
    • Try
      • B(G);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::S(F)
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)::B(G)+S(C)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • B(G);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::S(F)
        • K(a);N_SPINS(c),OGATEB,S_FLIGHT,XS(C)::B(G)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)
    • Try
      • B(G);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::S(F)
        • K(a);N_SPINS(c),S_FLIGHT,XS(C)::B(G)+S(F)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)
    • Try
      • B(G);CHECK
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT,XS(C)::QAR1(A)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT,XP(I)
    • Try
      • B(G);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::S(F)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT,XS(C)
    • Try
      • R(H);
      • Vars
        • K(a);N_SPINS(c),S_FLIGHT::S(F)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT,XS(C)
    • Try
      • R(J);CHECK,XS(c)
      • Vars
        • K(a);S_FLIGHT,XS(C)::S(F)
        • K(a);S_FLIGHT::S(F)
      • Refutation
        • B(d);XR(J)
  • Actual
    • B(G);
    • Vars
      • K(a);N_SPINS(c),S_FLIGHT::S(F)
      • K(a);N_SPINS(c),S_FLIGHT,XS(C)::S(F)
      • K(a);N_SPINS(c),S_FLIGHT,XP(I)::S(F)
      • K(a);N_SPINS(c),S_FLIGHT::B(G)+S(F)
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