MESON Chess Problem Database

Problem Display
PID: 193848 (4bb2/Q2RpNp1/RP2k1p1/1p4K1/1P6/8/8/8 w - - 0 1)

Barry, John Finan

Chess News, 1916

4bb2/Q2RpNp1/RP2k1p1/1p4K1/1P6/8/8/8

#2

7 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qb7?
      • threat
        • 2.Qd5#
      • 1...Kxf7
        • 2.Qd5#
      • 1...Bxd7!
    • 1.b7+?
      • 1...Kxd7
        • 2.b8Q#
        • 2.b8R#
      • 1...Kxf7!
  • Keys
    • 1.Ra1!
      • 1...Kxf7
        • 2.Qa2#
      • 1...Bxd7
        • 2.Qa2#
      • 1...Bxf7
        • 2.Re1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(b);P_SPINP(d),S_FLIGHT,XS(G)::QAB(E)
      • Refutation
        • B(f);XR(F)
    • Try
      • P(D);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(F)::P=Q
      • Refutation
        • K(b);P_SPINP(d),S_FLIGHT,XS(G)
  • Actual
    • R(C);
    • Vars
      • K(b);P_SPINP(d),S_FLIGHT,XS(G)::QAB(E)
      • B(f);SBLOCK,XR(F)::QAB(E)
      • B(f);SBLOCK,XS(G)::R(C)
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