MESON Chess Problem Database

Problem Display
PID: 101317 (Q6K/6p1/1p4N1/3p4/1r1knb1R/NpR5/2P5/1rn1B2B w - - 0 1)

Beach, Lennox F

Good Companions (October), 1918

Q6K/6p1/1p4N1/3p4/1r1knb1R/NpR5/2P5/1rn1B2B

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Sb5#
      • 2.Qxa4#
    • 1...Rb5
      • 2.Sxb5#
    • 1...Sf2
      • 2.Qxd5#
    • 1...Sxc3
      • 2.Bf2#
    • 1...Sg3
      • 2.Qxd5#
    • 1...Sc5
      • 2.Qxd5#
    • 1...Sg5
      • 2.Qxd5#
    • 1...Sd6
      • 2.Qxd5#
    • 1...bxc2
      • 2.Sxc2#
  • Tries
    • 1.Rd3+?
      • 1...Kc5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Sxd3!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qxb4#
      • 1...Sxc3
        • 2.Bf2#
      • 1...bxc2
        • 2.Sxc2#
      • 1...Sd3
        • 2.Rxd3#
      • 1...Sd2
        • 2.Qxg7#
      • 1...Ra4
        • 2.Sb5#
      • 1...Rc4
        • 2.Sb5#
      • 1...Rb5
        • 2.Sxb5#
      • 1...Bd6
        • 2.Qf2#
      • 1...Sa2
        • 2.Rd3#
      • 1...Sc5
        • 2.Qxg7#
      • 1...Sd6
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(d);N_GUARD::S(D),XR(d)
    • S(f);P_SPINB(g)::QAR1(H),XP(h)
    • S(f);N_GUARD,P_SPINB(g),SBLOCK,XR(E)::B(A)
    • P(c);XP(C)::S(D),XP(c)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • S(b);XR(E)
  • Actual
    • Q(H);
    • Threat
      • QAR2(H),XR(d)
    • Vars
      • S(f);N_GUARD,P_SPINB(g),SBLOCK,XR(E)::B(A)
      • P(c);XP(C)::S(D),XP(c)
      • S(b);N_GUARD::R1(E),XS(b)
      • S(f);N_GUARD,P_SPINB(g)::QAB(H),XP(j)
      • R(d);N_GUARD::S(D)
      • R(d);N_GUARD::S(D),XR(d)
      • B(g);OGATE,P_SPINS(f)::QAB(H)
      • S(b);N_GUARD::R1(E)
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