MESON Chess Problem Database

Problem Display
PID: 58347 (4r3/1q6/3P2R1/2p2b2/BrP1k1p1/1p6/1B2P1N1/4K2Q w - - 0 1)

Webster, LJ

Chess, 1943

4r3/1q6/3P2R1/2p2b2/BrP1k1p1/1p6/1B2P1N1/4K2Q

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Bxc6#
    • 1...Qa7
      • 2.Bc6#
    • 1...Qe7
      • 2.Bc6#
    • 1...Qg7
      • 2.Bc6#
    • 1...Qh7
      • 2.Bc6#
    • 1...Qb8
      • 2.Bc6#
  • Tries
    • 1.Qh6?
      • threat
        • 2.Qe3#
        • 2.Qf4#
      • 1...Bxg6
        • 2.Qf4#
        • 2.Qxg6#
      • 1...Be6
        • 2.Qf4#
      • 1...Bd7
        • 2.Qf4#
      • 1...Bc8
        • 2.Qf4#
      • 1...Rxc4!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Rxg4#
      • 1...Qxh7
        • 2.Bc6#
      • 1...Rxc4
        • 2.Qxb7#
      • 1...Bxg6
        • 2.Qxg6#
      • 1...g3
        • 2.Rg4#
      • 1...Qg7
        • 2.Bc6#
      • 1...Rg8
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(g);N_GUARD::B(F),XQ(g)
    • Q(g);N_GUARD::B(F)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);::QAR1(B)
      • Refutation
        • R(b);XP(G)
  • Actual
    • Q(B);
    • Threat
      • R(I),XP(d)
    • Vars
      • Q(g);N_GUARD,XQ(B)::B(F)
      • R(b);N_GUARD,XP(G)::QAB(B),XQ(g)
      • B(f);OGATE,P_SPINB(f),XR(I)::QAB(B),XB(f)
      • P(d);::R(I)
      • Q(g);N_GUARD::B(F)
      • R(h);N_GUARD::R(I)
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