MESON Chess Problem Database

Problem Display
PID: 32828 (4B3/2R3n1/3p4/3kpR2/Q1q2p2/P2P4/2r1N1PK/8 w - - 0 1)

Huggins, Colonel AZ

Source?, 0000

4B3/2R3n1/3p4/3kpR2/Q1q2p2/P2P4/2r1N1PK/8

#2

9 + 7

3500 Chess Problems by A. Z. Huggins 1872

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Sxf4#
    • 1...Qb3
      • 2.Sxf4#
    • 1...Qxd3
      • 2.Sxf4#
    • 1...Qb5
      • 2.Sxf4#
    • 1...Qa6
      • 2.Sxf4#
    • 1...Qc3
      • 2.Sxf4#
    • 1...Qc5
      • 2.Sxf4#
    • 1...Ra2
      • 2.Qxc4#
    • 1...Rb2
      • 2.Qxc4#
    • 1...Rd2
      • 2.Qxc4#
    • 1...Rxe2
      • 2.Qxc4#
    • 1...Sxf5
      • 2.Bf7#
    • 1...Sh5
      • 2.Bf7#
  • Tries
    • 1.Rxe5+?
      • 1...dxe5
        • 2.Qd7#
      • 1...Kxe5!
    • 1.dxc4+?
      • 1...Ke6
        • 2.Qd7#
      • 1...Rxc4
        • 2.Qxc4#
      • 1...Ke4!
  • Keys
    • 1.Rc5+!
      • 1...Kxc5
        • 2.Qc6#
      • 1...Ke6
        • 2.Qd7#
      • 1...Qxc5
        • 2.Sxf4#
      • 1...dxc5
        • 2.Qc6#
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • Q(b);N_GUARD::S(A),XP(c)
    • Q(b);N_GUARD,XP(E)::S(A),XP(c)
    • R(a);N_GUARD::QAB1(F),XQ(b)
    • R(a);N_GUARD,P_PINP(B),XS(A)::QAB1(F),XQ(b)
    • S(g);N_GUARD,N_SPINP(e),XR(G)::B(I)
    • S(g);N_GUARD::B(I)
  • Tries
    • Try
      • R(G);CHECK,XP(e)
      • Vars
        • P(f);SBLOCK,XR(G)::QAR2(F)
      • Refutation
        • K(d);P-FLIGHT,XR(G)
    • Try
      • P(E);CHECK,XQ(b)
      • Vars
        • K(d);N_SPINP(e),S_FLIGHT::QAB1(F)
        • R(a);OGATE,XP(E)::QAB1(F),XR(a)
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT
  • Actual
    • R(H);CHECK
    • Vars
      • K(d);P-FLIGHT,XR(H)::QAR1(F)
      • K(d);N_SPINP(e),S_FLIGHT::QAB1(F)
      • Q(b);SBLOCK,XR(H)::S(A),XP(c)
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