MESON Chess Problem Database

Problem Display
PID: 162944 (8/8/3p3p/4N2k/7p/4K3/8/7Q w - - 0 1)

Lincoln, Robert A

StrateGems, 2012

8/8/3p3p/4N2k/7p/4K3/8/7Q

#2

3 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Kf4?
      • threat
        • 2.Qf3#
        • 2.Qd1#
      • 1...h3
        • 2.Qxh3#
      • 1...dxe5+!
    • 1.Qg2?
      • threat
        • 2.Qg4#
        • 2.Qg6#
      • 1...h3
        • 2.Qg4#
      • 1...dxe5!
    • 1.Qb1?
      • threat
        • 2.Qf5#
        • 2.Qg6#
      • 1...Kg5
        • 2.Qg6#
      • 1...dxe5
        • 2.Qf5#
      • 1...h3!
    • 1.Qg1?
      • threat
        • 2.Qg4#
        • 2.Qg6#
      • 1...h3
        • 2.Qg4#
      • 1...dxe5!
    • 1.Qh3?
      • threat
        • 2.Qg4#
        • 2.Qf5#
      • 1...dxe5
        • 2.Qf5#
      • 1...Kg5!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qf5#
        • 2.Qg6#
        • 2.Qg4#
      • 1...Kg5
        • 2.Qg6#
      • 1...dxe5
        • 2.Qf5#
      • 1...h3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(a);OGATEB::QAR2(A),XP(a)
      • Refutation
        • P(c);CHECK,XS(C)
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAB1(A)
      • Refutation
        • P(c);XS(C)
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • P(c);XS(C)::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAB1(A)
      • Refutation
        • P(c);XS(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XS(C)::QAR2(A)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
  • Actual
    • Q(A);N_PINP(a)
    • Threat
      • DUALS(3)
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • P(c);XS(C)::QAR2(A)
      • P(a);::QAB1(A)
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