MESON Chess Problem Database

Problem Display
PID: 22712 (8/8/p7/Np1p4/k1qQ4/1RB5/2B5/K7 w - - 0 1)

Rice, John Michael

Chess Problems for Solving, 1995

8/8/p7/Np1p4/k1qQ4/1RB5/2B5/K7

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Qxb4#
  • Tries
    • 1.Ka2?
      • 1...Qxd4
        • 2.Rb1#
        • 2.Rb2#
        • 2.Ra3#
      • 1...Qb4
        • 2.Ra3#
        • 2.Qxb4#
      • 1...b4!
    • 1.Kb2?
      • threat
        • 2.Ra3#
      • 1...Qb4
        • 2.Qxb4#
      • 1...b4!
    • 1.Rb4+?
      • 1...Kxa5
        • 2.Ra4#
      • 1...Ka3!
    • 1.Rxb5+?
      • 1...Ka3
        • 2.Bb2#
      • 1...Kxb5!
  • Keys
    • 1.Bb4!
      • 1...Qf1+
        • 2.Rb1#
      • 1...Qc3+
        • 2.Rxc3#
      • 1...Qxd4+
        • 2.Rb2#
      • 1...Qxb3
        • 2.Bxb3#
      • 1...Qxc2
        • 2.Ra3#
      • 1...Qxb4
        • 2.Qxb4#
      • 1...Qe2
        • 2.Ra3#
      • 1...Qd3
        • 2.Ra3#
        • 2.Rxd3#
      • 1...Qc5
        • 2.Ra3#
        • 2.Rc3#
      • 1...Qc6
        • 2.Ra3#
        • 2.Rc3#
      • 1...Qc7
        • 2.Ra3#
        • 2.Rc3#
      • 1...Qc8
        • 2.Ra3#
        • 2.Rc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(b);OGATE::QAR1(E),XQ(b)
  • Tries
    • Try
      • K(A);P-FLIGHT,P_SPINR(C)
      • Refutation
        • P(c);N_SPINQ(b)
    • Try
      • K(A);S_FLIGHT
      • Threat
        • B(B)+R(C),DCHECK
      • Vars
        • Q(b);OGATE,P_PINR(C)::QAR1(E),XQ(b)
      • Refutation
        • P(c);N_SPINQ(b)
    • Try
      • R(C);CHECK,N_PINQ(b)
      • Vars
        • K(a);P-FLIGHT,XS(F)::B(D)+R(C),DCHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);CHECK,XP(c)
      • Vars
        • K(a);N_SPINQ(b),P-FLIGHT::B(D)
      • Refutation
        • K(a);N_SPINQ(b),S_FLIGHT,XR(C)
  • Actual
    • B(D);N_PINQ(b)
    • Vars
      • Q(b);CHECK,N_GUARD::B(B)+R(C)
      • Q(b);CHECK,N_GUARD::B(B)+R(C),XQ(b)
      • Q(b);CHECK,N_GUARD,XQ(E)::B(B)+R(C)
      • Q(b);OGATE,P_SPINQ(b),XR(C)::B(B),XQ(b)
      • Q(b);XB(B)::R1(C)
      • Q(b);OGATE,P_SPINQ(b),XB(D)::QAR1(E),XQ(b)
      • Q(b);::B(B)+R(C),DCHECK
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