MESON Chess Problem Database

Problem Display
PID: 152359 (8/8/5B2/4RB2/1p6/3p4/1kP2K2/b1NR2Q1 w - - 0 1)

Jones, JJ

Pen & Pencil, 1888

(First published on Sat Oct 20 1888)

8/8/5B2/4RB2/1p6/3p4/1kP2K2/b1NR2Q1

#2

8 + 4

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ka3
      • 2.Ra5#
    • 1...Kc3
      • 2.Rc5#
  • Tries
    • 1.Sxd3+?
      • 1...Ka2
        • 2.Rxa1#
        • 2.Ra5#
      • 1...Ka3
        • 2.Rxa1#
        • 2.Ra5#
      • 1...Kc3
        • 2.Rc5#
      • 1...Kxc2!
    • 1.Ra5+?
      • 1...Kxc2
        • 2.Bxd3#
      • 1...Kb1!
    • 1.Rb5+?
      • 1...Kxc2
        • 2.Bxd3#
      • 1...Ka3
        • 2.Ra5#
      • 1...Kb1!
    • 1.Rc5+?
      • 1...Ka3
        • 2.Ra5#
      • 1...Kb1!
    • 1.Rd5+?
      • 1...Kxc2
        • 2.Bxd3#
      • 1...Ka3
        • 2.Ra5#
      • 1...Kb1!
    • 1.Re6+?
      • 1...Kxc2
        • 2.Bxd3#
      • 1...Ka3
        • 2.Ra6#
      • 1...Kb1!
    • 1.Re7+?
      • 1...Kxc2
        • 2.Bxd3#
      • 1...Ka3
        • 2.Ra7#
      • 1...Kb1!
    • 1.Re8+?
      • 1...Kxc2
        • 2.Bxd3#
      • 1...Ka3
        • 2.Ra8#
      • 1...Kb1!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qb3#
      • 1...Kb1
        • 2.Qa2#
      • 1...Kxc2
        • 2.Qb3#
      • 1...Ka3
        • 2.Ra5#
        • 2.Qa2#
        • 2.Qb3#
      • 1...Kc3
        • 2.Re2#
        • 2.Rc5#
      • 1...b3
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(b);S_FLIGHT::R(F)
    • K(b);S_FLIGHT::B(H)+R(F),DCHECK
  • Tries
    • Try
      • S(A);CHECK,XP(c)
      • Vars
        • K(b);S_FLIGHT::B(H)+R(F),DCHECK
      • Refutation
        • K(b);P-FLIGHT,XP(D)
    • Try
      • R(F);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c),XP(D)::B(G),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);CHECK,P_PINP(d)
      • Vars
        • K(b);N_SPINP(d),P-FLIGHT,P_SPINP(c),XP(D)::B(G),XP(c)
        • K(b);N_SPINP(d),S_FLIGHT::R(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(b);S_FLIGHT::R(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c),XP(D)::B(G),XP(c)
        • K(b);S_FLIGHT::R(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c),XP(D)::B(G),XP(c)
        • K(b);S_FLIGHT::R(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c),XP(D)::B(G),XP(c)
        • K(b);S_FLIGHT::R(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c),XP(D)::B(G),XP(c)
        • K(b);S_FLIGHT::R(F)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(b);P-FLIGHT::QAB1(C)
      • K(b);P-FLIGHT,P_SPINP(c),XP(D)::QAB1(C)
      • P(d);::QAR1(C),XP(d)
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