MESON Chess Problem Database

Problem Display
PID: 160612 (2K5/3n4/kbQ5/8/2P5/8/1N6/8 w - - 0 1)

Lincoln, Robert A

British Chess Magazine, 2014

2K5/3n4/kbQ5/8/2P5/8/1N6/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Qa4#
      • 2.Qb5#
    • 1...Ka7
      • 2.Qb7#
  • Tries
    • 1.Kxd7?
      • 1...Ka5
        • 2.Qa4#
        • 2.Qb5#
      • 1...Ka7!
    • 1.c5?
      • 1...Ka5
        • 2.Qa4#
      • 1...Ka7
        • 2.Qb7#
      • 1...Se5
        • 2.Qxb6#
      • 1...Sf6
        • 2.Qxb6#
      • 1...Sb8
        • 2.Qxb6#
      • 1...Sf8
        • 2.Qxb6#
      • 1...Sxc5!
  • Keys
    • 1.Sa4!
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka7
        • 2.Qb7#
      • 1...Sc5
        • 2.Qxb6#
      • 1...Se5
        • 2.Qxb6#
      • 1...Sf6
        • 2.Qxb6#
      • 1...Sb8
        • 2.Qxb6#
      • 1...Sf8
        • 2.Qxb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINB(b),P-FLIGHT::QAR1(C)
  • Tries
    • Try
      • K(D);S_FLIGHT,XS(c)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT
    • Try
      • P(B);
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAR1(C)
        • S(c);N_GUARD::QAR1(C),XB(b)
      • Refutation
        • S(c);XP(B)
  • Actual
    • S(A);
    • Vars
      • K(a);N_SPINB(b),P-FLIGHT::QAR1(C)
      • S(c);N_GUARD::QAR1(C),XB(b)
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