MESON Chess Problem Database

Problem Display
PID: 175770 (8/3p4/3K4/p7/6Q1/1k2nRp1/N4bR1/nBB5 w - - 0 1)

McAllister, George W

Philadelphia Times, 1898

8/3p4/3K4/p7/6Q1/1k2nRp1/N4bR1/nBB5

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...a4
      • 2.Qb4#
      • 2.Qg8#
  • Tries
    • 1.Bg6?
      • 1...Kxa2
        • 2.Qa4#
      • 1...Be1
        • 2.Bf7#
      • 1...Bg1
        • 2.Bf7#
      • 1...Sc2
        • 2.Bf7#
      • 1...a4!
  • Keys
    • 1.Bh7!
      • 1...Kxa2
        • 2.Qa4#
      • 1...Be1
        • 2.Bg8#
      • 1...Bg1
        • 2.Bg8#
      • 1...Sc2
        • 2.Bg8#
      • 1...a4
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);
      • Vars
        • K(c);N_SPINS(d),P_SPINB(b),S_FLIGHT,XS(C)::QAR2(F)
        • B(b);::B(A)
        • S(a);SBLOCK::B(A)
      • Refutation
        • P(f);
  • Actual
    • B(A);
    • Vars
      • K(c);N_SPINS(d),P_SPINB(b),S_FLIGHT,XS(C)::QAR2(F)
      • B(b);::B(A)
      • S(a);SBLOCK::B(A)
      • P(f);SBLOCK::QAB(F)
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