MESON Chess Problem Database

Problem Display
PID: 241006 (5n2/8/3QN3/7k/6Rp/8/4K3/8 w - - 0 1)

Lincoln, Robert A

Variantim, 2012

5n2/8/3QN3/7k/6Rp/8/4K3/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qf4?
      • threat
        • 2.Sg7#
        • 2.Qg5#
      • 1...Sh7
        • 2.Sg7#
      • 1...Sxe6!
    • 1.Qe7?
      • threat
        • 2.Qxh4#
        • 2.Qg5#
      • 1...Kh6
        • 2.Qxh4#
      • 1...Sxe6
        • 2.Qxh4#
      • 1...Sg6
        • 2.Qg5#
      • 1...Sh7
        • 2.Qxh4#
      • 1...h3
        • 2.Qh4#
        • 2.Qg5#
      • 1...Kxg4!
    • 1.Qxf8?
      • threat
        • 2.Rg5#
      • 1...Kxg4
        • 2.Qf3#
      • 1...h3!
    • 1.Qd5+?
      • 1...Kxg4
        • 2.Qf3#
      • 1...Kh6!
    • 1.Qd8?
      • threat
        • 2.Qxh4#
        • 2.Qg5#
      • 1...Kh6
        • 2.Qxh4#
      • 1...Sxe6
        • 2.Qxh4#
      • 1...Sg6
        • 2.Qg5#
      • 1...Sh7
        • 2.Qxh4#
      • 1...h3
        • 2.Qh4#
        • 2.Qg5#
      • 1...Kxg4!
  • Keys
    • 1.Qd3!
      • 1...Kxg4
        • 2.Qf3#
      • 1...Kh6
        • 2.Rxh4#
      • 1...Sxe6
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sd7
        • 2.Qg6#
      • 1...Sh7
        • 2.Qg6#
      • 1...h3
        • 2.Qxh3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::S(D)
      • Refutation
        • S(c);XS(D)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR2(C),XP(a)
        • S(c);XS(D)::QAR1(C),XP(a)
        • S(c);::QAR1(C)
        • S(c);::QAR1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
    • Try
      • Q(C);XS(c)
      • Threat
        • R1(B)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(B)::QAB1(C)
      • Refutation
        • P(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(B)::QAB1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR2(C),XP(a)
        • S(c);XS(D)::QAR1(C),XP(a)
        • S(c);::QAR1(C)
        • S(c);::QAR1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
  • Actual
    • Q(C);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(B)::QAB1(C)
      • K(b);P-FLIGHT::R(B),XP(a)
      • S(c);N_GUARD,XS(D)::QAB1(C)
      • S(c);N_GUARD::QAB1(C),XS(c)
      • S(c);N_GUARD::QAB1(C)
      • P(a);OGATEB::QAR2(C),XP(a)
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