MESON Chess Problem Database

Problem Display
PID: 23885 (8/2Q5/k5r1/1p6/8/K1RB4/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/2Q5/k5r1/1p6/8/K1RB4/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Rc6#
    • 1...Rg2
      • 2.Rc6#
    • 1...Rg3
      • 2.Rc6#
    • 1...Rg4
      • 2.Rc6#
    • 1...Rg5
      • 2.Rc6#
    • 1...Rc6
      • 2.Rxc6#
    • 1...Rg7
      • 2.Rc6#
    • 1...Rg8
      • 2.Rc6#
  • Tries
    • 1.Ka2?
      • threat
        • 2.Ra3#
      • 1...Rg4
        • 2.Rc6#
      • 1...Rg2+!
    • 1.Kb2?
      • threat
        • 2.Ra3#
      • 1...Rg4
        • 2.Rc6#
      • 1...Rg2+!
    • 1.Kb4?
      • threat
        • 2.Bxb5#
        • 2.Ra3#
      • 1...Rg5
        • 2.Ra3#
        • 2.Rc6#
      • 1...Rb6
        • 2.Ra3#
      • 1...Rg4+!
    • 1.Rc5?
      • threat
        • 2.Bxb5#
      • 1...Rg3
        • 2.Rc6#
      • 1...Rb6!
    • 1.Qb7+?
      • 1...Ka5
        • 2.Qxb5#
      • 1...Kxb7!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Ra4#
      • 1...b4+
        • 2.Rxb4#
      • 1...bxc4
        • 2.Bxc4#
      • 1...Rg4
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(c);N_GUARD::R(B)
    • R(c);N_GUARD::R(B),XR(c)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • R(B)
      • Vars
        • R(c);N_GUARD::R(B)
      • Refutation
        • R(c);CHECK
    • Try
      • K(A);S_FLIGHT
      • Threat
        • R(B)
      • Vars
        • R(c);N_GUARD::R(B)
      • Refutation
        • R(c);CHECK
    • Try
      • K(A);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::R(B)
      • Refutation
        • R(c);CHECK
    • Try
      • R(B);
      • Threat
        • B(C),XP(a)
      • Vars
        • R(c);N_GUARD,P_PINB(C)::R(B)
      • Refutation
        • R(c);
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(D),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XQ(D)
  • Actual
    • R(B);N_PINP(a)
    • Threat
      • R(B)
    • Vars
      • P(a);CHECK,OGATEB::B(C)+R(B),XP(a)
      • P(a);OGATE,P_SPINP(a),XR(B)::B(C),XP(a)
      • R(c);N_GUARD::R(B)
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