MESON Chess Problem Database

Problem Display
PID: 18028 (8/8/8/8/R3p3/4K3/pk1N4/1b1Q4 w - - 0 1)

Harley, Brian

Time & Tide, 1952

(First published on Sat Aug 30 1952)

8/8/8/8/R3p3/4K3/pk1N4/1b1Q4

#2

4 + 4

15290 Harley Scrapbook 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Ka1
      • 2.Qxb1#
    • 1...Kc3
      • 2.Qb3#
  • Tries
    • 1.Sc4+?
      • 1...Ka1
        • 2.Qd4#
      • 1...Kc3!
    • 1.Rb4+?
      • 1...Ka3
        • 2.Qb3#
        • 2.Qa4#
      • 1...Kc3
        • 2.Rb3#
        • 2.Qb3#
      • 1...Ka1!
    • 1.Qb3+?
      • 1...Ka1
        • 2.Qxb1#
        • 2.Qc3#
      • 1...Kc1!
    • 1.Qc1+?
      • 1...Ka1
        • 2.Sb3#
        • 2.Qxb1#
        • 2.Qc3#
      • 1...Kxc1!
  • Keys
    • 1.Ra3!
      • 1...Ka1
        • 2.Qxb1#
      • 1...Kxa3
        • 2.Qb3#
      • 1...a1Q
        • 2.Sc4#
      • 1...a1S
        • 2.Sc4#
      • 1...a1B
        • 2.Sc4#
      • 1...a1R
        • 2.Sc4#
      • 1...Bc2
        • 2.Sc4#
      • 1...Bd3
        • 2.Rb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(c);P_SPINB(a),P_SPINP(b),S_FLIGHT::QAR1(A),XB(a)
    • K(c);S_FLIGHT::QAR1(A)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(c);P_SPINB(a),P_SPINP(b),S_FLIGHT::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • K(c);P_SPINB(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • R(D);
    • Vars
      • K(c);P_SPINB(a),P_SPINP(b),S_FLIGHT::QAR1(A),XB(a)
      • K(c);S_FLIGHT,XR(D)::QAR1(A)
      • P(b);::S(B)
      • B(a);::S(B)
      • B(a);::R1(D)
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