MESON Chess Problem Database

Problem Display
PID: 160151 (8/4Rpp1/2pp4/2pk1p2/1p1pN3/n7/4Q1K1/8 w - - 0 1)

Lincoln, Robert A

Chess Life, 1990

8/4Rpp1/2pp4/2pk1p2/1p1pN3/n7/4Q1K1/8

#2

4 + 10

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qxd3#
    • 1...g5
      • 2.Sf6#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qf3#
      • 1...d3
        • 2.Qxd3#
      • 1...c4!
    • 1.Sc3+?
      • 1...dxc3
        • 2.Qd3#
      • 1...bxc3!
    • 1.Sxd6?
      • threat
        • 2.Qe5#
      • 1...Kxd6
        • 2.Qe5#
      • 1...f6
        • 2.Qe6#
      • 1...Sc4!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Sd2#
      • 1...Kc4
        • 2.Sxd6#
      • 1...fxe4
        • 2.Qxf7#
      • 1...d3
        • 2.Qxd3#
      • 1...c4
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(c);OGATEB::QAR2(A),XP(c)
    • P(j);N_GUARD::S(C)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB(A)
      • Vars
        • P(c);OGATEB::QAR2(A),XP(c)
      • Refutation
        • P(d);
    • Try
      • S(C);CHECK
      • Vars
        • P(c);S_CUTP(b),XS(C)::QAR2(A)
      • Refutation
        • P(b);XS(C)
    • Try
      • S(C);XP(h)
      • Threat
        • QAR1(A)
      • Vars
        • K(e);P-FLIGHT,XS(C)::QAB1(A)
        • P(i);N_GUARD::QAB1(A)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+S(C)
    • Vars
      • K(e);S_FLIGHT::S(C),XP(h)
      • P(f);OGATE,P_SPINP(f),XS(C)::QAB(A),XP(i)
      • P(c);OGATEB::QAR2(A),XP(c)
      • P(d);SBLOCK::QAR2(A),XP(f)
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