MESON Chess Problem Database

Problem Display
PID: 166422 (8/8/p1n5/2Q5/k7/8/1KP5/8 w - - 0 1)

Lincoln, Robert A

Australian Chess Problem Magazine, 1996

8/8/p1n5/2Q5/k7/8/1KP5/8

#2

3 + 3

5454 Near Snap 2018
15148 Sadier Collection 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Kc3?
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sd4
        • 2.Qb4#
      • 1...Sa5
        • 2.Qb4#
      • 1...Se5
        • 2.Qb4#
      • 1...Sa7
        • 2.Qb4#
      • 1...Se7
        • 2.Qb4#
      • 1...Sb8
        • 2.Qb4#
      • 1...Sd8
        • 2.Qb4#
      • 1...a5!
  • Keys
    • 1.c3!
      • 1...Sd4
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sa5
        • 2.Qb4#
      • 1...Se5
        • 2.Qb4#
      • 1...Sa7
        • 2.Qb4#
      • 1...Se7
        • 2.Qb4#
      • 1...Sb8
        • 2.Qb4#
      • 1...Sd8
        • 2.Qb4#
      • 1...a5
        • 2.Qxc6#

Anticipated by 12369(1978)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • P(b);
  • Actual
    • P(B);
    • Vars
      • S(c);N_GUARD::QAR1(C)
      • S(c);N_GUARD::QAR1(C),XS(c)
      • P(b);SBLOCK::QAB(C),XS(c)
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