MESON Chess Problem Database

Problem Display
PID: 135625 (8/1R6/4B3/8/3Q4/n4p1K/8/5k2 w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

8/1R6/4B3/8/3Q4/n4p1K/8/5k2

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...f2
      • 2.Qd1#
  • Tries
    • 1.Bc4+?
      • 1...Ke1
        • 2.Re7#
      • 1...Sxc4!
    • 1.Rb2?
      • threat
        • 2.Qf2#
        • 2.Qd1#
      • 1...Ke1
        • 2.Qg1#
      • 1...f2
        • 2.Qxf2#
        • 2.Qd1#
      • 1...Sc2!
    • 1.Qe3?
      • 1...Sb1
        • 2.Bc4#
        • 2.Rxb1#
      • 1...Sc2
        • 2.Bc4#
      • 1...Sc4
        • 2.Bxc4#
        • 2.Rb1#
      • 1...Sb5
        • 2.Bc4#
      • 1...f2!
  • Keys
    • 1.Re7!
      • 1...Ke1
        • 2.Bc4#
      • 1...Ke2
        • 2.Bc4#
      • 1...f2
        • 2.Qd1#
      • 1...Sb1
        • 2.Bc4#
      • 1...Sc2
        • 2.Bc4#
      • 1...Sc4
        • 2.Bxc4#
      • 1...Sb5
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR2(B)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • S(b);XB(C)
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • S(b);
    • Try
      • Q(B);
      • Vars
        • S(b);N_GUARD::B(C)
      • Refutation
        • P(c);
  • Actual
    • R(D);
    • Vars
      • K(a);P-FLIGHT::R(D)+B(C)
      • K(a);S_FLIGHT::R(D)+B(C),DCHECK
      • P(c);SBLOCK::QAR2(B)
      • S(b);N_GUARD::B(C)
      • S(b);N_GUARD::B(C),XS(b)
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