MESON Chess Problem Database

Problem Display
PID: 234694 (8/8/8/2N5/7b/5p2/3Q4/5k1K w - - 0 1)

Lincoln, Robert A

Kudesnik, 2011

8/8/8/2N5/7b/5p2/3Q4/5k1K

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f2
      • 2.Qd1#
  • Tries
    • 1.Sd3?
      • 1...Be1
        • 2.Qxe1#
      • 1...Bf2
        • 2.Qxf2#
      • 1...Bg5
        • 2.Qe1#
        • 2.Qd1#
        • 2.Qf2#
      • 1...Bf6
        • 2.Qe1#
        • 2.Qd1#
        • 2.Qf2#
      • 1...Be7
        • 2.Qe1#
        • 2.Qd1#
        • 2.Qf2#
      • 1...Bd8
        • 2.Qe1#
        • 2.Qd1#
        • 2.Qf2#
      • 1...f2
        • 2.Qd1#
      • 1...Bg3!
  • Keys
    • 1.Se4!
      • 1...Be1
        • 2.Qd3#
      • 1...Bf2
        • 2.Qxf2#
      • 1...Bg3
        • 2.Sxg3#
      • 1...Bg5
        • 2.Sg3#
        • 2.Qd1#
        • 2.Qf2#
      • 1...Bf6
        • 2.Sg3#
        • 2.Qd1#
        • 2.Qf2#
      • 1...Be7
        • 2.Sg3#
        • 2.Qd1#
        • 2.Qf2#
      • 1...Bd8
        • 2.Sg3#
        • 2.Qd1#
        • 2.Qf2#
      • 1...f2
        • 2.Qd1#

There are these versions: 153151

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK,S_CUTB(c)::QAR2(B)
  • Tries
    • Try
      • S(C);
      • Vars
        • B(c);N_GUARD::QAR1(B),XB(c)
        • P(b);S_CUTB(c)::QAR2(B)
      • Refutation
        • B(c);
  • Actual
    • S(C);
    • Vars
      • B(c);SBLOCK::QAB(B)
      • B(c);N_GUARD::QAR1(B),XB(c)
      • B(c);N_GUARD::S(C),XB(c)
      • P(b);S_CUTB(c)::QAR2(B)
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