MESON Chess Problem Database

Problem Display
PID: 18716 (8/8/8/6B1/2B3K1/b1Q5/r3P3/3k4 w - - 0 1)

Smedley, Don A

3rd Prize, The Problemist, 1957

8/8/8/6B1/2B3K1/b1Q5/r3P3/3k4

#2

5 + 3

3310 2345 Chess Problems 1997
56 The Problemist 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qd2#
    • 1...Rb2
      • 2.Qc1#
    • 1...Rd2
      • 2.Qxd2#
    • 1...Bc1
      • 2.Qxc1#
    • 1...Bb2
      • 2.Qd2#
    • 1...Bb4
      • 2.Qc1#
    • 1...Bc5
      • 2.Qc1#
    • 1...Bd6
      • 2.Qc1#
    • 1...Be7
      • 2.Qc1#
    • 1...Bf8
      • 2.Qc1#
  • Tries
    • 1.Kf3?
      • 1...Rxe2
        • 2.Bxe2#
      • 1...Rd2
        • 2.Qxd2#
      • 1...Ra1
        • 2.Bb3#
        • 2.Qd2#
      • 1...Rb2
        • 2.Qc1#
      • 1...Bc1
        • 2.Qxc1#
      • 1...Bb2
        • 2.Bb3#
        • 2.Qd2#
      • 1...Bb4
        • 2.Qc1#
      • 1...Bc5
        • 2.Qc1#
      • 1...Bd6
        • 2.Qc1#
      • 1...Be7
        • 2.Qc1#
      • 1...Bf8
        • 2.Qc1#
      • 1...Rc2!
    • 1.Bb3+?
      • 1...Rc2
        • 2.Qd2#
      • 1...Kxe2!
    • 1.Qd4+?
      • 1...Ke1
        • 2.Qg1#
      • 1...Rd2
        • 2.Qxd2#
      • 1...Kc2!
    • 1.Qd3+?
      • 1...Rd2
        • 2.Qxd2#
      • 1...Ke1!
  • Keys
    • 1.Qe3!
      • 1...Ke1
        • 2.Qg1#
      • 1...Kc2
        • 2.Qb3#
      • 1...Rxe2
        • 2.Qxe2#
      • 1...Rd2
        • 2.Qxd2#
      • 1...Rc2
        • 2.Qg1#
      • 1...Ra1
        • 2.Qd2#
      • 1...Rb2
        • 2.Qc1#
      • 1...Bc1
        • 2.Qxc1#
      • 1...Bb2
        • 2.Qd2#
      • 1...Bb4
        • 2.Qc1#
      • 1...Bc5
        • 2.Qc1#
      • 1...Bd6
        • 2.Qc1#
      • 1...Be7
        • 2.Qc1#
      • 1...Bf8
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD::QAR1(B)
    • R(b);S_CUTB(c)::QAR1(B)
    • R(b);N_GUARD::QAR1(B),XR(b)
    • B(c);N_GUARD::QAR1(B),XB(c)
    • B(c);S_CUTR(b)::QAR1(B)
    • B(c);N_GUARD::QAR1(B)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • R(b);OGATE,XP(A)::B(C),XR(b)
        • R(b);N_GUARD::QAR1(B),XR(b)
        • R(b);S_CUTB(c)::QAR1(B)
        • B(c);N_GUARD::QAR1(B),XB(c)
        • B(c);N_GUARD::QAR1(B)
      • Refutation
        • R(b);
    • Try
      • B(C);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XP(A)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • R(b);N_GUARD,P_SPINR(b)::QAR1(B),XR(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(B),XR(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::QAR2(B)
      • K(a);S_FLIGHT::QAB1(B)
      • R(b);OGATE,XP(A)::QAB1(B),XR(b)
      • R(b);N_GUARD::QAR1(B),XR(b)
      • R(b);SBLOCK::QAR(B)
      • R(b);N_GUARD::QAR1(B)
      • R(b);S_CUTB(c)::QAR1(B)
      • B(c);N_GUARD::QAR1(B),XB(c)
      • B(c);S_CUTR(b)::QAR1(B)
      • B(c);N_GUARD::QAR1(B)
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