MESON Chess Problem Database

Problem Display
PID: 88763 (8/6B1/8/8/1K6/1p6/kr2p3/4Q3 w - - 0 1)

Lincoln, Robert A

The Problemist, 1992

8/6B1/8/8/1K6/1p6/kr2p3/4Q3

#2

3 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Qa1#
    • 1...Rd2
      • 2.Qa1#
  • Tries
    • 1.Ka4?
      • 1...Rc2
        • 2.Qa1#
      • 1...Rd2
        • 2.Qa1#
      • 1...Rb1!
    • 1.Kc4?
      • 1...Ka3
        • 2.Qa5#
      • 1...Rb1
        • 2.Qa5#
      • 1...Rd2
        • 2.Qa1#
      • 1...Rc2+!
    • 1.Kc5?
      • 1...Ka3
        • 2.Qa5#
      • 1...Rb1
        • 2.Qa5#
      • 1...Rd2
        • 2.Qa1#
      • 1...Rc2+!
    • 1.Bc3?
      • 1...Rc2
        • 2.Qa1#
      • 1...Rd2
        • 2.Qa1#
      • 1...Rb1!
    • 1.Bd4?
      • 1...Rc2
        • 2.Qa1#
      • 1...Rd2
        • 2.Qa1#
      • 1...Rb1!
    • 1.Be5?
      • 1...Rc2
        • 2.Qa1#
      • 1...Rd2
        • 2.Qa1#
      • 1...Rb1!
    • 1.Bf6?
      • 1...Rc2
        • 2.Qa1#
      • 1...Rd2
        • 2.Qa1#
      • 1...Rb1!
    • 1.Bh8?
      • 1...Rc2
        • 2.Qa1#
      • 1...Rd2
        • 2.Qa1#
      • 1...Rb1!
  • Keys
    • 1.Kb5!
      • 1...Ka3
        • 2.Qa5#
      • 1...Rb1
        • 2.Qa5#
      • 1...Rc2
        • 2.Qa1#
      • 1...Rd2
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);::QAR1(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • R(b);::QAR1(A)
      • Refutation
        • R(b);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • R(b);SBLOCK::QAR(A)
        • R(b);::QAR1(A)
      • Refutation
        • R(b);CHECK
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • R(b);SBLOCK::QAR(A)
        • R(b);::QAR1(A)
      • Refutation
        • R(b);CHECK
    • Try
      • B(C);
      • Vars
        • R(b);::QAR1(A)
      • Refutation
        • R(b);
    • Try
      • B(C);
      • Vars
        • R(b);::QAR1(A)
      • Refutation
        • R(b);
    • Try
      • B(C);
      • Vars
        • R(b);::QAR1(A)
      • Refutation
        • R(b);
    • Try
      • B(C);
      • Vars
        • R(b);::QAR1(A)
      • Refutation
        • R(b);
    • Try
      • B(C);
      • Vars
        • R(b);::QAR1(A)
      • Refutation
        • R(b);
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • R(b);SBLOCK::QAR(A)
      • R(b);::QAR1(A)
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