MESON Chess Problem Database

Problem Display
PID: 129850 (3n4/3p1kB1/3P3K/2P5/8/Q2B4/8/8 w - - 0 1)

Ort, Josef

Casopis ceskoslovenskych sachistu, 1913

3n4/3p1kB1/3P3K/2P5/8/Q2B4/8/8

#2

6 + 3

6490 yacpdb 2009
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qa2#
      • 2.Qb3#
  • Tries
    • 1.Bg6+?
      • 1...Ke6
        • 2.Qa2#
        • 2.Qb3#
      • 1...Kg8!
    • 1.Qa2+?
      • 1...Ke8
        • 2.Qg8#
      • 1...Se6!
    • 1.Qb3+?
      • 1...Ke8
        • 2.Qg8#
      • 1...Se6!
  • Keys
    • 1.Qa8!
      • 1...Ke6
        • 2.Qa2#
      • 1...Ke8
        • 2.Bg6#
      • 1...Kg8
        • 2.Bc4#
      • 1...Se6
        • 2.Bg6#
      • 1...Sc6
        • 2.Bc4#
      • 1...Sb7
        • 2.Bc4#

This anticipates 76804(1945)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR2(A)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR2(A)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::QAB(A)
      • K(b);P_SPINS(c),S_FLIGHT::B(B)
      • S(c);SBLOCK::B(B)
      • S(c);N_GUARD::B(B)
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