MESON Chess Problem Database

Problem Display
PID: 169971 (2Q2K2/6pk/2R3pP/8/8/8/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2017

2Q2K2/6pk/2R3pP/8/8/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Kf7?
      • 1...gxh6
        • 2.Qg8#
      • 1...g5
        • 2.Qg8#
      • 1...Kxh6!
    • 1.Qh3?
      • threat
        • 2.hxg7#
      • 1...Kh8
        • 2.hxg7#
      • 1...gxh6!
    • 1.Qb7?
      • threat
        • 2.Qxg7#
      • 1...Kh8
        • 2.Qxg7#
      • 1...Kxh6!
    • 1.Qd7?
      • threat
        • 2.Qxg7#
      • 1...Kh8
        • 2.Qxg7#
      • 1...Kxh6!
    • 1.Qc7?
      • threat
        • 2.Qxg7#
      • 1...Kh8
        • 2.Qxg7#
      • 1...Kxh6!
  • Keys
    • 1.Qe6!
      • 1...Kxh6
        • 2.Qxg6#
      • 1...Kh8
        • 2.Qg8#
      • 1...gxh6
        • 2.Qg8#
      • 1...g5
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(b);SBLOCK,XP(B)::QAB1(C)
        • P(a);::QAB1(C)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(a),XP(B)
    • Try
      • Q(C);
      • Threat
        • QAR(C)+P(B),XP(b)
      • Vars
        • K(c);P-FLIGHT::QAR(C)+P(B)DCHECK,XP(b)
      • Refutation
        • P(b);P_SPINP(b),XP(B)
    • Try
      • Q(C);P_PINP(b)
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAB1(C),XP(b)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,P_SPINP(a),XP(B)
    • Try
      • Q(C);P_PINP(b)
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAB1(C),XP(b)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,P_SPINP(a),XP(B)
    • Try
      • Q(C);P_PINP(b)
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAB1(C),XP(b)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,P_SPINP(a),XP(B)
  • Actual
    • Q(C);
    • Vars
      • K(c);P-FLIGHT,P_SPINP(a),XP(B)::QAR1(C),XP(a)
      • K(c);P-FLIGHT::QAR1(C)
      • P(b);SBLOCK,XP(B)::QAB1(C)
      • P(a);::QAB1(C)
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