MESON Chess Problem Database

Problem Display
PID: 87698 (2r2n1b/3p1Q2/2p2B2/4Pk2/2R2p2/5P2/5K2/8 w - - 0 1)

Nield, Joshua

The Problemist, 1930

2r2n1b/3p1Q2/2p2B2/4Pk2/2R2p2/5P2/5K2/8

#2

6 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf6
      • 2.Qxf6#
    • 1...Se6
      • 2.Qh7#
    • 1...Sg6
      • 2.Qxd7#
  • Tries
    • 1.Bh4+?
      • 1...Bf6
        • 2.Qxf6#
      • 1...Kxe5!
    • 1.Bg5+?
      • 1...Kxe5
        • 2.Bxf4#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Kxg5!
    • 1.Bd8+?
      • 1...Bf6
        • 2.Qxf6#
      • 1...Kxe5!
  • Keys
    • 1.Be7+!
      • 1...Kxe5
        • 2.Re4#
      • 1...Bf6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(g);OGATE,P_SPINB(g),XB(E)::QAR1(F),XB(g)
    • S(f);N_GUARD,SBLOCK::QAB(F)
    • S(f);N_GUARD,SBLOCK::QAB(F),XP(d)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(F),XB(g)
      • Refutation
        • K(b);P-FLIGHT,XP(D)
    • Try
      • B(E);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(D)::B(E),XP(a)
        • B(g);N_GUARD,P_SPINB(g)::QAR1(F),XB(g)
      • Refutation
        • K(b);P-FLIGHT,XB(E)
    • Try
      • B(E);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(F),XB(g)
      • Refutation
        • K(b);P-FLIGHT,XP(D)
  • Actual
    • B(E);CHECK
    • Vars
      • K(b);P-FLIGHT,XP(D)::R1(C)
      • B(g);N_GUARD,P_SPINB(g)::QAR1(F),XB(g)
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