MESON Chess Problem Database

Problem Display
PID: 56144 (N7/8/Q4B2/2kP4/p7/pqnP3K/P1R5/8 w - - 0 1)

Mansfield, Comins

Complete Mansfield/III, 1999

N7/8/Q4B2/2kP4/p7/pqnP3K/P1R5/8

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Be7#
    • 1...Qxd5
      • 2.Qb6#
    • 1...Qb4
      • 2.Qc6#
  • Tries
    • 1.Be7+?
      • 1...Kxd5
        • 2.Qd6#
      • 1...Kd4!
    • 1.Qc4+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Qxc4!
    • 1.Qb6+?
      • 1...Kxd5
        • 2.Sc7#
      • 1...Qxb6!
    • 1.Qd6+?
      • 1...Kb5
        • 2.Qb6#
      • 1...Kxd6!
    • 1.d4+?
      • 1...Kb4
        • 2.Be7#
      • 1...Kxd5!
  • Keys
    • 1.Be5!
      • 1...Kb4
        • 2.Bd6#
      • 1...Kxd5
        • 2.Qd6#
      • 1...Qxa2
        • 2.Qa5#
      • 1...Qxc2
        • 2.Qc4#
      • 1...Qxd5
        • 2.Qb6#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qb1
        • 2.Qc4#
      • 1...Qb2
        • 2.Qc4#
      • 1...Qb4
        • 2.Qc6#
      • 1...Qb5
        • 2.Qd6#
      • 1...Qb6
        • 2.Qc4#
      • 1...Qb7
        • 2.Qc4#
      • 1...Qb8
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINS(c),S_FLIGHT::B(G)
    • Q(b);N_GUARD,SBLOCK,XP(E)::QAB1(F)
    • Q(b);SBLOCK::QAR1(F)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(e);N_SPINS(c),P-FLIGHT,XP(E)::QAR1(F)
      • Refutation
        • K(e);N_SPINS(c),S_FLIGHT
    • Try
      • Q(F);CHECK,N_PINS(c)
      • Vars
        • K(e);OGATE,S_FLIGHT::QAR1(F)
      • Refutation
        • Q(b);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);N_SPINS(c),P-FLIGHT,XP(E)::S(H)
      • Refutation
        • Q(b);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);N_SPINS(c),P-FLIGHT::QAR1(F)
      • Refutation
        • K(e);N_SPINS(c),S_FLIGHT,XQ(F)
    • Try
      • P(C);CHECK
      • Vars
        • K(e);N_SPINS(c),S_FLIGHT::B(G)
      • Refutation
        • K(e);N_SPINS(c),P-FLIGHT,XP(E)
  • Actual
    • B(G);
    • Vars
      • K(e);N_SPINS(c),S_FLIGHT::B(G)
      • K(e);N_SPINS(c),P-FLIGHT,XP(E)::QAR1(F)
      • Q(b);N_GUARD,XP(A)::QAR2(F)
      • Q(b);N_GUARD,N_SPINS(c),XR(B)::QAR1(F)
      • Q(b);N_GUARD,SBLOCK,XP(E)::QAB1(F)
      • Q(b);N_GUARD,N_SPINS(c)::QAR1(F),XQ(b)
      • Q(b);N_GUARD::QAR1(F)
      • Q(b);SBLOCK::QAR1(F)
      • Q(b);SBLOCK::QAB1(F)
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