MESON Chess Problem Database

Problem Display
PID: 67545 (Q1b5/Pr1p4/1Pk2NKR/p1N5/P4P2/4pr2/8/2R3BB w - - 0 1)

Braithwaite, Kenneth Holmes

Holladay, Edgar Dinwiddie

Chess Life & Review, 1988

Q1b5/Pr1p4/1Pk2NKR/p1N5/P4P2/4pr2/8/2R3BB

#2

12 + 7

6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Sxb7#
    • 1...d6
      • 2.Scd7#
  • Tries
    • 1.Kf5?
      • 1...d5+
        • 2.Sfd7#
      • 1...d6+
        • 2.Scd7#
      • 1...Kxb6
        • 2.Sd5#
      • 1...e2
        • 2.Sxb7#
      • 1...Kd6!
    • 1.Kg5?
      • 1...Kxb6
        • 2.Sd5#
      • 1...e2
        • 2.Sxb7#
      • 1...d5
        • 2.Sfd7#
      • 1...d6
        • 2.Scd7#
      • 1...Kd6!
    • 1.Kh5?
      • 1...Kxb6
        • 2.Sd5#
      • 1...e2
        • 2.Sxb7#
      • 1...d5
        • 2.Sfd7#
      • 1...d6
        • 2.Scd7#
      • 1...Kd6!
    • 1.Kg7?
      • 1...d5+
        • 2.Sfd7#
      • 1...d6+
        • 2.Scd7#
      • 1...Kxb6
        • 2.Sd5#
      • 1...e2
        • 2.Sxb7#
      • 1...Kd6!
    • 1.Kh7?
      • 1...d5+
        • 2.Sfd7#
      • 1...d6+
        • 2.Scd7#
      • 1...Kxb6
        • 2.Sd5#
      • 1...e2
        • 2.Sxb7#
      • 1...Kd6!
    • 1.Qxc8+?
      • 1...Kxb6
        • 2.Qxb7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Kd6!
  • Keys
    • 1.Kf7!
      • 1...d5+
        • 2.Sfd7#
      • 1...d6+
        • 2.Scd7#
      • 1...Kxb6
        • 2.Sd5#
      • 1...Kd6
        • 2.Sce4#
      • 1...e2
        • 2.Sxb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);::R(A)+S(F),XR(e)
    • P(f);SBLOCK::R(A)+S(F)
  • Tries
    • Try
      • K(I);P_SPINP(E),S_FLIGHT
      • Vars
        • P(f);CHECK,N_SPINR(b),P_SPINR(e),SBLOCK::R(J)+S(H)
        • P(f);CHECK,SBLOCK::R(A)+S(F)
        • K(d);N_SPINR(b),P-FLIGHT,XP(G)::R(J)+S(H),DCHECK
        • P(a);::R(A)+S(F),XR(e)
      • Refutation
        • K(d);N_SPINR(b),P-FLIGHT
    • Try
      • K(I);P-FLIGHT
      • Vars
        • K(d);N_SPINR(b),P-FLIGHT,XP(G)::R(J)+S(H),DCHECK
        • P(a);::R(A)+S(F),XR(e)
        • P(f);N_SPINR(b),P_SPINR(e),SBLOCK::R(J)+S(H)
        • P(f);SBLOCK::R(A)+S(F)
      • Refutation
        • K(d);N_SPINR(b),P-FLIGHT
    • Try
      • K(I);S_FLIGHT
      • Vars
        • K(d);N_SPINR(b),P-FLIGHT,XP(G)::R(J)+S(H),DCHECK
        • P(a);::R(A)+S(F),XR(e)
        • P(f);N_SPINR(b),P_SPINR(e),SBLOCK::R(J)+S(H)
        • P(f);SBLOCK::R(A)+S(F)
      • Refutation
        • K(d);N_SPINR(b),P-FLIGHT
    • Try
      • K(I);P-FLIGHT
      • Vars
        • P(f);CHECK,N_SPINR(b),P_SPINR(e),SBLOCK::R(J)+S(H)
        • P(f);CHECK,SBLOCK::R(A)+S(F)
        • K(d);N_SPINR(b),P-FLIGHT,XP(G)::R(J)+S(H),DCHECK
        • P(a);::R(A)+S(F),XR(e)
      • Refutation
        • K(d);N_SPINR(b),P-FLIGHT
    • Try
      • K(I);S_FLIGHT
      • Vars
        • P(f);CHECK,N_SPINR(b),P_SPINR(e),SBLOCK::R(J)+S(H)
        • P(f);CHECK,SBLOCK::R(A)+S(F)
        • K(d);N_SPINR(b),P-FLIGHT,XP(G)::R(J)+S(H),DCHECK
        • P(a);::R(A)+S(F),XR(e)
      • Refutation
        • K(d);N_SPINR(b),P-FLIGHT
    • Try
      • Q(L);CHECK,XB(g)
      • Vars
        • K(d);N_SPINR(b),P-FLIGHT,XP(G)::QAR1(L),XR(e)
        • R(e);N_GUARD::QAR1(L),XR(e)
      • Refutation
        • K(d);N_SPINR(b),P-FLIGHT
  • Actual
    • K(I);S_FLIGHT
    • Vars
      • P(f);CHECK,N_SPINR(b),P_SPINR(e),SBLOCK::R(J)+S(H)
      • P(f);CHECK,SBLOCK::R(A)+S(F)
      • K(d);N_SPINR(b),P-FLIGHT,XP(G)::R(J)+S(H),DCHECK
      • K(d);N_SPINR(b),P-FLIGHT::S(F)
      • P(a);::R(A)+S(F),XR(e)
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