MESON Chess Problem Database

Problem Display
PID: 163273 (2B3Q1/kp6/N7/8/8/8/K7/1R6 w - - 0 1)

Lincoln, Robert A

StrateGems, 2013

2B3Q1/kp6/N7/8/8/8/K7/1R6

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Rxb7+?
      • 1...Ka8
        • 2.Sc7#
      • 1...Kxa6!
    • 1.Qd5?
      • threat
        • 2.Qxb7#
      • 1...Ka8
        • 2.Qxb7#
      • 1...bxa6
        • 2.Qb7#
      • 1...b6
        • 2.Qb7#
      • 1...b5
        • 2.Qb7#
      • 1...Kxa6!
    • 1.Qf7?
      • threat
        • 2.Qxb7#
      • 1...Ka8
        • 2.Qxb7#
      • 1...Kxa6!
    • 1.Qh7?
      • threat
        • 2.Qxb7#
      • 1...Ka8
        • 2.Qxb7#
      • 1...Kxa6!
    • 1.Qg1+?
      • 1...Kxa6
        • 2.Qb6#
      • 1...Ka8
        • 2.Bxb7#
      • 1...b6!
    • 1.Qg2?
      • threat
        • 2.Qxb7#
      • 1...Ka8
        • 2.Qxb7#
      • 1...bxa6
        • 2.Qb7#
      • 1...b6
        • 2.Qb7#
      • 1...b5
        • 2.Qb7#
      • 1...Kxa6!
    • 1.Qg7?
      • threat
        • 2.Qxb7#
      • 1...Ka8
        • 2.Qxb7#
      • 1...Kxa6!
  • Keys
    • 1.Qg3!
      • 1...Kxa6
        • 2.Qa3#
      • 1...Ka8
        • 2.Qb8#
      • 1...bxa6
        • 2.Qb8#
      • 1...b6
        • 2.Qb8#
      • 1...b5
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::S(C)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(b)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAB1(E),XP(b)
        • P(b);XS(C)::QAR1(E)
        • P(b);::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b),XS(C)
    • Try
      • Q(E);P_PINP(b)
      • Threat
        • QAR1(E),XP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAB1(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(E);P_PINP(b)
      • Threat
        • QAR1(E),XP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAB1(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b),XS(C)::QAR1(E)
        • K(a);P-FLIGHT::B(D),XP(b)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(b)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAB1(E),XP(b)
        • P(b);XS(C)::QAR1(E)
        • P(b);::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b),XS(C)
    • Try
      • Q(E);P_PINP(b)
      • Threat
        • QAR1(E),XP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAB1(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
  • Actual
    • Q(E);
    • Vars
      • K(a);OGATEB,P-FLIGHT,P_SPINP(b),XS(C)::QAR(E)
      • K(a);P-FLIGHT::QAR1(E)
      • P(b);XS(C)::QAB1(E)
      • P(b);::QAB1(E)
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